Multi-signal, software-defined and staring cognitive communications system

US 8,233,412 B1
Filed: 06/30/2010
Issued: 07/31/2012
Est. Priority Date: 06/30/2010
Status: Active Grant

First Claim

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1. A half-duplex, staring cognitive communications system, comprising:

a) a broadband antenna system, comprising;

i. at least one broadband antenna;

ii. an antenna interface unit operatively connected to said at least one broadband antenna, said antenna interface unit comprising;

1. an isolation element operatively connected between a transmitter system and a staring receiver system for supporting short switch times between transmit and receive operations;

2. a first RF harmonic filter bank operatively connected to said isolation element for providing suppression of transmit signal set harmonics in the RF power output; and

,3. a pre-select filter bank for receiving RF signals from said isolation element and for separating and isolating frequency block sets for further signal pre-processing;

b) a staring receiver system operatively connected to said broadband antenna system for viewing and pre-processing input RF signals present in a plurality of channels at the same time, said staring receiver system comprising at least one staring receiver subsystem, said at least one staring receiver subsystem comprising;

i. at least one block translator operatively switch connected to said pre-select filter bank for providing a frequency translation (down conversion) of a pre-selected frequency block;

ii. at least one parallel channelization, automated gain control (AGC) and signal detection pre-processor system, each AGC and signal detection pre-processor system comprising;

1. a fan-out element for replicating said input RF signals into a plurality of pre-process channels along an RF spectral block;

2. a plurality of pre-process channel miniature RF filters, aligned in parallel, for continuous frequency coverage along said RF spectral block, for separating and isolating a set of comparatively narrow frequency channels on a substantially continuous basis;

3. a plurality of gain control elements for providing automatic channelized level control, under intelligent process control, of said isolated channels;

4. a plurality of RF signal detectors for receiving said isolated channels for detecting the presence of signals content, for further determining relative levels, center frequencies, and bandwidths; and

,5. a fan-in element for combining said plurality of level controlled, isolated channels to a common RF spectrum, thus providing a pre-processed receive RF output;

iii. a set point summing amplifier for combining said pre-processed receive RF outputs and providing a combined output; and

,iv. a radio frequency-analog-to-digital converter (RF-ADC) for receiving said combined output and converting it to a digital output,wherein said at least one parallel channelization, automated gain control (AGC) and signal detection pre-processor system is configured to allow viewing and conversion of said plurality of channels on a substantially continuous basis without overloading said RF-ADC;

c) a coordinated digital signal processing (DSP) array operatively connected to said staring receiver system for providing digital signal processing of the receive and transmit signal sets, on a real-time basis, as well as management of the software defined and staring cognitive communications system from the digital domain; and

,d) a transmitter system operatively connected to said DSP array and to said broadband antenna system, said transmitter system comprising at least one transmitter subsystem, said at least one transmitter subsystem comprising;

i. a radio frequency-digital-to-analog converter (RF-DAC) for receiving at least one modulated RF signal from said DSP array, said at least one modulated RF signal having independent modulation from the other modulated RF signals for simultaneous transmission;

ii. a second RF harmonic filter bank operatively connected to said RF-DAC for the suppression of sampling process artifacts, including signals harmonics;

iii. an RF pre-amp system operatively connected to said second RF harmonic filter bank for the linear amplification of the RF signals to a working level for an RF power amplifier;

iv. at least one block translator system operatively connected to said RF pre-amp system for providing a frequency translation of a pre-amplified frequency block to a final frequency band; and

,v. an RF power amplifier for linearly amplifying pre-amplified frequency blocks with transmit signal content from the pre-amp system, as well as translated frequency blocks with transmit signal content from said block translators;

wherein a set of cognitive waveforms are generated within said DSP array for transmission from said antenna system and recovery processed within said DSP array for reception from the antenna system, and whereas orthogonal frequency division multiplexed (OFDM) data packets are interleaved with short duration gaps, wherein said data packets are randomly distributed simultaneously over a subset of multiple unoccupied frequencies from an OFDM frequency set, and whereas the combination of the data packets in time and frequency provide a data message,i. said data packets being transmitted and received channels signals activity being monitored during the short duration gaps between data packets so as to maintain rapid response to the changes in the spectral environment;

ii. said data packets further containing supervisory information and error correction coding, in both time and frequency, to allow for robust message data reception and recovery by users without prior time and frequency synchronization; and

,iii. said data packets being on subsets of the OFDM frequency set wherein the number of simultaneous packets can be increased to increase the overall message throughput and decreased to respond to currently reduced numbers of unoccupied frequencies.

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Abstract

The integrated, multiple independent, simultaneous signal software defined radio system architecture of this invention is suitable for many new very-low latency, software defined radio applications, both cognitive and conventional, including: communications networks, electronic warfare, surveillance and radar. The system supports multiple operations, locally controlled or remotely controlled, with simultaneous signals prosecutions and anti-jam system-to-system networking. New cognitive waveforms are defined that simultaneously seek to maximize data throughput in arbitrary spectral environments, while normally avoiding interference with current and new arbitrary signal occurrences. The cognitive radio system has the capability to continuously receive and process all the ongoing signals present in a wideband frequency block, including the recognition/characterization of all signals and the recovery of multiple desired signals, and then rapidly respond by transmitting as appropriate, multi-carrier, modulated signals. The present invention uses massively-parallel fixed tuned receive channelization, along with massively parallel digital signal processing and software generated, multi-modulated RF signals, to provide a system that is fast enough to cognitively manage the ongoing operation of multiple signals, multiple frequencies, and multiple operations, all simultaneously.

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21 Claims

1. A half-duplex, staring cognitive communications system, comprising:
- a) a broadband antenna system, comprising;
  
  i. at least one broadband antenna;
  
  ii. an antenna interface unit operatively connected to said at least one broadband antenna, said antenna interface unit comprising;
  
  1. an isolation element operatively connected between a transmitter system and a staring receiver system for supporting short switch times between transmit and receive operations;
  
  2. a first RF harmonic filter bank operatively connected to said isolation element for providing suppression of transmit signal set harmonics in the RF power output; and
  
  ,3. a pre-select filter bank for receiving RF signals from said isolation element and for separating and isolating frequency block sets for further signal pre-processing;
  
  b) a staring receiver system operatively connected to said broadband antenna system for viewing and pre-processing input RF signals present in a plurality of channels at the same time, said staring receiver system comprising at least one staring receiver subsystem, said at least one staring receiver subsystem comprising;
  
  i. at least one block translator operatively switch connected to said pre-select filter bank for providing a frequency translation (down conversion) of a pre-selected frequency block;
  
  ii. at least one parallel channelization, automated gain control (AGC) and signal detection pre-processor system, each AGC and signal detection pre-processor system comprising;
  
  1. a fan-out element for replicating said input RF signals into a plurality of pre-process channels along an RF spectral block;
  
  2. a plurality of pre-process channel miniature RF filters, aligned in parallel, for continuous frequency coverage along said RF spectral block, for separating and isolating a set of comparatively narrow frequency channels on a substantially continuous basis;
  
  3. a plurality of gain control elements for providing automatic channelized level control, under intelligent process control, of said isolated channels;
  
  4. a plurality of RF signal detectors for receiving said isolated channels for detecting the presence of signals content, for further determining relative levels, center frequencies, and bandwidths; and
  
  ,5. a fan-in element for combining said plurality of level controlled, isolated channels to a common RF spectrum, thus providing a pre-processed receive RF output;
  
  iii. a set point summing amplifier for combining said pre-processed receive RF outputs and providing a combined output; and
  
  ,iv. a radio frequency-analog-to-digital converter (RF-ADC) for receiving said combined output and converting it to a digital output,wherein said at least one parallel channelization, automated gain control (AGC) and signal detection pre-processor system is configured to allow viewing and conversion of said plurality of channels on a substantially continuous basis without overloading said RF-ADC;
  
  c) a coordinated digital signal processing (DSP) array operatively connected to said staring receiver system for providing digital signal processing of the receive and transmit signal sets, on a real-time basis, as well as management of the software defined and staring cognitive communications system from the digital domain; and
  
  ,d) a transmitter system operatively connected to said DSP array and to said broadband antenna system, said transmitter system comprising at least one transmitter subsystem, said at least one transmitter subsystem comprising;
  
  i. a radio frequency-digital-to-analog converter (RF-DAC) for receiving at least one modulated RF signal from said DSP array, said at least one modulated RF signal having independent modulation from the other modulated RF signals for simultaneous transmission;
  
  ii. a second RF harmonic filter bank operatively connected to said RF-DAC for the suppression of sampling process artifacts, including signals harmonics;
  
  iii. an RF pre-amp system operatively connected to said second RF harmonic filter bank for the linear amplification of the RF signals to a working level for an RF power amplifier;
  
  iv. at least one block translator system operatively connected to said RF pre-amp system for providing a frequency translation of a pre-amplified frequency block to a final frequency band; and
  
  ,v. an RF power amplifier for linearly amplifying pre-amplified frequency blocks with transmit signal content from the pre-amp system, as well as translated frequency blocks with transmit signal content from said block translators;
  
  wherein a set of cognitive waveforms are generated within said DSP array for transmission from said antenna system and recovery processed within said DSP array for reception from the antenna system, and whereas orthogonal frequency division multiplexed (OFDM) data packets are interleaved with short duration gaps, wherein said data packets are randomly distributed simultaneously over a subset of multiple unoccupied frequencies from an OFDM frequency set, and whereas the combination of the data packets in time and frequency provide a data message,i. said data packets being transmitted and received channels signals activity being monitored during the short duration gaps between data packets so as to maintain rapid response to the changes in the spectral environment;
  
  ii. said data packets further containing supervisory information and error correction coding, in both time and frequency, to allow for robust message data reception and recovery by users without prior time and frequency synchronization; and
  
  ,iii. said data packets being on subsets of the OFDM frequency set wherein the number of simultaneous packets can be increased to increase the overall message throughput and decreased to respond to currently reduced numbers of unoccupied frequencies.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- - 2. The half-duplex, staring cognitive communications system of claim 1, wherein:
    - a) said digital signal processing (DSP) array, comprises a single DSP array subsystem;
      
      b) said staring receiver system comprises at least two of said staring receiver subsystems;
      
      c) said transmitter system comprises at least two of said transmitter subsystems; and
      
      ,d) said broadband antenna system comprises at least one of said broadband antennas, said at least one of said broadband antennas being an antenna subsystem with at least two radiation elements for simultaneous emission or reception,said software-defined and staring cognitive communications system having multiple, simultaneous directional emission or reception beams capability.
  - 3. The half-duplex, staring cognitive communications system of claim 1, including a digital signal processing, a transmit and a receive capability for multiple simultaneous, arbitrary and software defined signal waveforms, where in said digital signal processing provides virtual channelization for said arbitrary signals.
  - 4. The half-duplex, staring cognitive communications system of claim 1, wherein:
    - a) said digital signal processing (DSP) array, comprises a single DSP array subsystem;
      
      b) said staring receiver system comprises at least two of said staring receiver subsystems;
      
      c) said transmitter system comprises at least two of said transmitter subsystems; and
      
      ,d) said broadband antenna system comprises at least one of said broadband antennas, said at least one of said broadband antennas being an antenna subsystem with at least two radiation elements for simultaneous emission or reception,said software-defined and staring cognitive communications system having multiple, simultaneous directional emission or reception beams capability; and
      
      ,said software-defined and staring cognitive communications system having capability for multiple simultaneous, arbitrary and software defined signal waveforms, wherein said digital signal processing array provides virtual channelization for said arbitrary signals.
  - 5. The half-duplex, staring cognitive communications system of claim 1, wherein said broadband antenna system comprises a single radiating element antenna, said staring receiver system comprises one staring receiver subsystem, and said transmitter system comprises one transmitter subsystem.
  - 6. The half-duplex, staring cognitive communications system of claim 1, wherein said broadband antenna system comprises a four radiating element antenna, said staring receiver system comprises four staring receiver subsystems, and said transmitter system comprises four transmitter subsystems.
  - 7. The half-duplex, staring cognitive communications system of claim 1, wherein said isolation element comprises a circulator or fast T/R switch.
  - 8. The half-duplex, staring cognitive communications system of claim 1, wherein said broadband antenna system comprises a single radiating element antenna, said staring receiver system comprises more than one staring receiver subsystems, and said transmitter system comprises more than one transmitter subsystems, said multiple receiver and transmitter subsystems simultaneously providing multiple frequency block translations and/or subdivision of the required RF frequency coverage.
  - 9. The half-duplex, staring cognitive communications system of claim 1, wherein said broadband antenna system comprises a four radiating element antenna, said staring receiver system comprises four sets of more than one staring receiver subsystems, each set associated respectively with each of the four antenna radiating elements, and said transmitter system comprises four sets of more than one transmitter subsystems, each set associated respectively with each of the four antenna radiating elements, said multiple receiver and transmitter subsystems simultaneously providing multiple frequency block translations and/or subdivision of the required RF frequency coverage, and said four receiver and transmitter subsystem sets having multiple, simultaneous directional emission or reception beams capability.

10. A full-duplex, staring cognitive communications system, comprising:
- a) a broadband antenna system, comprising;
  
  i. at least one broadband antenna;
  
  ii. an antenna interface unit operatively connected to said at least one broadband antenna, said antenna interface unit comprising;
  
  1. an isolation element operatively connected between a transmitter system and a staring receiver system for partial suppression of transmit to receive signal leakage during simultaneous transmit and receive operations;
  
  2. a summing element operatively connected between an output port of said isolation element, an output port of a low power radio frequency-digital-to-analog converter (RF-DAC) of the transmitter system, and an input port of a pre-select filter bank element for additional suppression of transmit to receive signal leakage during simultaneous transmit and receive operations, the signal leakage suppression resulting from a controlled combining of the low power DAC signal output with a receive signal output of said isolation element;
  
  3. said pre-select filter bank element being operatively connected between the isolation element'"'"'s output port and an input port of the staring receiver, for receiving RF signals from said summing element and for separating and isolating frequency block sets for further signal pre-processing in the staring receiver system;
  
  b) a staring receiver system operatively connected to said broadband antenna system for viewing and pre-processing input RF signals present in a plurality of channels at the same time, said staring receiver system comprising at least one staring receiver subsystem, said at least one staring receiver subsystem comprising;
  
  i. at least one parallel channelization, automated gain control (AGC) and signal detection pre-processor system, each AGC and signal detection pre-processor system comprising;
  
  1. a fan-out element for replicating said input RF signals into a plurality of pre-process channels along an RF spectral block;
  
  2. a plurality of pre-process channel miniature RF filters, aligned in parallel, for continuous frequency coverage along said RF spectral block, for separating and isolating a set of comparatively narrow frequency channels on a substantially continuous basis;
  
  3. a plurality of gain control elements for providing automatic channelized level control, under intelligent process control, of said isolated channels;
  
  4. a plurality of RF signal detectors for receiving said isolated channels for detecting the presence of signals content, for further determining relative levels, center frequencies, and bandwidths; and
  
  ,5. a fan-in element for combining said plurality of level controlled, isolated channels to a common RF spectrum, thus providing a pre-processed receive RF output;
  
  ii. a set point summing amplifier for combining said pre-processed receive RF outputs and providing a combined output; and
  
  ,iii. a radio frequency-analog-to-digital converter (RF-ADC) for receiving said combined output and converting it to a digital output,wherein said at least one parallel channelization, automated gain control (AGC) and signal detection pre-processor system is configured to allow viewing and conversion of said plurality of channels on a substantially continuous basis without overloading said RF-ADC;
  
  c) a coordinated digital signal processing (DSP) array operatively connected to said staring receiver system for providing digital signal processing of the receive and transmit signal sets, on a real-time basis, as well as management of the software defined and staring cognitive communications system from the digital domain; and
  
  ,d) a transmitter system operatively connected to said DSP array and to said broadband antenna system, said transmitter system comprising at least one transmitter subsystem, said at least one transmitter subsystem comprising;
  
  i. a radio frequency-power output-digital-to-analog converter (RF-Power-DAC) for receiving at least one modulated RF signal from said DSP array, said at least one modulated RF signal having independent modulation from the other modulated RF signals for simultaneous transmission, said RF-Power-DAC having output analog filtering to adequately suppress sampling signal artifacts from above the first Nyquist band; and
  
  ,ii. a low power radio frequency-digital-to-analog converter (RF-DAC) for receiving at least one modulated RF signal from said DSP array, said at least one modulated RF signal being negatively matched to the transmit leakage signal at the broadband antenna system'"'"'s summing element, for the purpose of further suppressing the transmit leakage in the receiver system'"'"'s RF signal input;
  
  wherein a set of cognitive waveforms are generated within said DSP array for transmission from said antenna system and recovery processed within said DSP array for reception from the antenna system, and whereas orthogonal frequency division multiplexed (OFDM) data packets are interleaved with short duration gaps, wherein said data packets are randomly distributed simultaneously over a subset of multiple unoccupied frequencies from an OFDM frequency set, and whereas the combination of the data packets in time and frequency provide a data message,i. said data packets being transmitted and received channels signals activity being monitored simultaneously and continuously so as to maintain rapid response to the changes in the spectral environment;
  
  ii. said data packets further containing supervisory information and error correction coding, in both time and frequency, to allow for robust message data reception and recovery by users without prior time and frequency synchronization; and
  
  ,iii. said data packets being on subsets of the OFDM frequency set wherein the number of simultaneous packets can be increased to increase the overall message throughput and decreased to respond to currently reduced numbers of unoccupied frequencies.
- View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
- - 11. The full-duplex, staring cognitive communications system of claim 10, wherein:
    - a) said broadband antenna system comprises at least one broadband receive antenna and at least one broadband transmit antenna, wherein said broadband receive antenna connects to the staring receiver system and said broadband transmit antenna connects to the transmitter system.
  - 12. The full-duplex, staring cognitive communications system of claim 10, wherein:
    - a) said digital signal processing (DSP) array, comprises a single DSP array subsystem;
      
      b) said staring receiver system comprises at least two of said staring receiver subsystems;
      
      c) said transmitter system comprises at least two of said transmitter subsystems; and
      
      ,d) said broadband antenna system comprises at least one of said broadband antennas, said at least one of said broadband antennas being an antenna subsystem with at least two radiation elements for simultaneous emission and reception,said software-defined and staring cognitive communications system having multiple, simultaneous directional emission and/or reception beams capability.
  - 13. The full-duplex, staring cognitive communications system of claim 10, including a digital signal processing, a transmit and a receive capability for multiple simultaneous, arbitrary and software defined signal waveforms, wherein said digital signal processing provides virtual channelization for said arbitrary signals.
  - 14. The full-duplex, staring cognitive communications system of claim 10, wherein:
    - a) said digital signal processing (DSP) array, comprises a single DSP array subsystem;
      
      b) said staring receiver system comprises at least two of said staring receiver subsystems;
      
      c) said transmitter system comprises at least two of said transmitter subsystems; and
      
      ,d) said broadband antenna system comprises at least one of said broadband antennas, said at least one of said broadband antennas being an antenna subsystem with at least two radiation elements for simultaneous emission and/or reception,said software-defined and staring cognitive communications system having multiple, simultaneous directional emission and/or reception beams capability; and
      
      ,said software-defined and staring cognitive communications system having capability for multiple simultaneous, arbitrary and software defined signal waveforms, wherein said digital signal processing array provides virtual channelization for said arbitrary signals.
  - 15. The full-duplex, staring cognitive communications system of claim 10, wherein said broadband antenna system comprises a single radiating element antenna, said staring receiver system comprises one staring receiver subsystem, and said transmitter system comprises one transmitter subsystem.
  - 16. The full-duplex, staring cognitive communications system of claim 10, wherein said broadband antenna system comprises a four radiating element antenna, said staring receiver system comprises four staring receiver subsystems, and said transmitter system comprises four transmitter subsystems.
  - 17. The full-duplex, staring cognitive communications system of claim 10, wherein switched-in frequency up-conversion elements of at least one frequency block are inserted between the transmitter'"'"'s RF-Power-DAC output port and the isolation element, and between the transmitter'"'"'s RF-DAC output port and the summing element, and wherein a switched-in frequency down-conversion element of at least one frequency block is inserted between the summing element'"'"'s output port and the pre-select filter bank element'"'"'s input port, said frequency conversion blocks allowing higher frequency spectrum, beyond the direct sampled conversion frequency range of the transmitter system and the staring receiver system, to be selectively translated respectively from and to the direct sampled conversion frequency range.
  - 18. The full-duplex, staring cognitive communications system of claim 17, wherein said broadband antenna system comprises a single radiating element antenna, said frequency block frequency translations comprise more than one pair of switched-in frequency up-conversion elements and more than one down-conversion elements, said staring receiver system comprises more than one staring receiver subsystems, and said transmitter system comprises more than one transmitter subsystems, said multiple receiver and transmitter subsystems simultaneously providing multiple frequency block translations and/or subdivision of the required RF frequency coverage.
  - 19. The full-duplex, staring cognitive communications system of claim 17, wherein said broadband antenna system comprises a four radiating element antenna, said frequency block frequency translations comprise four sets of more than one pair of switched-in frequency up-conversion elements and more than one down-conversion elements, said staring receiver system comprises four sets of more than one staring receiver subsystems, and said transmitter system comprises four sets of more than one transmitter subsystems, each set associated respectively with each of the four antenna radiating elements, said multiple receiver and transmitter subsystems simultaneously providing multiple frequency block translations and/or subdivision of the required RF frequency coverage, and said four receiver and transmitter subsystem sets having multiple, simultaneous directional emission and/or reception beams capability.

20. A half-duplex, software-defined and staring cognitive communications system, comprising:
- a) a broadband antenna system, comprising;
  
  i. at least one broadband antenna;
  
  ii. an antenna interface unit operatively connected to said at least one broadband antenna, said antenna interface unit comprising;
  
  1. an isolation element operatively connected between a transmitter system and a staring receiver system for supporting short switch times between transmit and receive operations;
  
  2. a first RF harmonic filter bank operatively connected to said isolation element for providing suppression of transmit signal set harmonics in the RF power output;
  
  3. a pre-select filter bank for receiving RF signals from said isolation element and for separating and isolating frequency block sets for further signal pre-processing;
  
  b) a staring receiver system operatively connected to said broadband antenna system for viewing and pre-processing input RF signals present in a plurality of channels at the same time, said staring receiver system comprising at least one staring receiver subsystem, said at least one staring receiver subsystem comprising;
  
  i. at least one block translator operatively switch connected to said pre-select filter bank for providing a frequency translation of a pre-selected frequency block;
  
  ii. at least one parallel channelization, automated gain control (AGC) and signal detection pre-processor system, each AGC and signal detection pre-processor system comprising;
  
  1. a fan-out element for replicating said input RF signals into a plurality of pre-process channels along an RF spectral block;
  
  2. a plurality of pre-process channel miniature RF filters, aligned in parallel, for continuous frequency coverage along said RF spectral block, for separating and isolating a set of comparatively narrow frequency channels on a continuous basis;
  
  3. a plurality of gain control elements for providing automatic channelized level control, under intelligent process control, of said isolated channels;
  
  4. a plurality of RF signal detectors for receiving said isolated channels for detecting the presence of signals content, for further determining relative levels, center frequencies, and bandwidths; and
  
  ,5. a fan-in element for combining said plurality of level controlled, isolated channels to a common RF spectrum, thus providing a pre-processed receive RF output;
  
  iii. a set point summing amplifier for combining said pre-processed receive RF outputs and providing a combined output; and
  
  ,iv. a radio frequency-analog-to-digital converter (RF-ADC) for receiving said combined output and converting it to a digital output,wherein said at least one parallel channelization, automated gain control (AGC) and signal detection pre-processor system is configured to allow viewing and conversion of said plurality of channels on a substantially continuous basis without overloading said RF-ADC;
  
  c) a coordinated digital signal processing (DSP) array operatively connected to said staring receiver system for providing digital signal processing of the receive and transmit signal sets, on a real-time basis, as well as management of the software defined and staring cognitive communications system from the digital domain; and
  
  ,d) a transmitter system operatively connected to said DSP array and to said broadband antenna system, said transmitter system comprising at least one transmitter subsystem, said at least one transmitter subsystem comprising;
  
  i. a radio frequency-digital-to-analog converter (RF-DAC) for receiving at least one modulated RF signal from said DSP array, said at least one modulated RF signal having independent modulation from the other modulated RF signals for simultaneous transmission;
  
  ii. a second RF harmonic filter bank operatively connected to said RF-DAC for the suppression of sampling process artifacts, including signals harmonics;
  
  iii. an RF pre-amp system operatively connected to said second RF harmonic filter bank for the linear amplification of the RF signals to a working level for an RF power amplifier;
  
  iv. at least one block translator system operatively connected to said RF pre-amp system for providing a frequency translation of a pre-amplified frequency block to a final frequency band; and
  
  ,v. an RF power amplifier for linearly amplifying pre-amplified frequency blocks with transmit signal content from the pre-amp system, as well as translated frequency blocks with transmit signal content from said block translators.

21. A full-duplex, staring cognitive communications system, comprising:
- a) a broadband antenna system, comprising;
  
  i. at least one broadband antenna;
  
  ii. an antenna interface unit operatively connected to said at least one broadband antenna, said antenna interface unit comprising;
  
  1. an isolation element operatively connected between a transmitter system and a staring receiver system for partial suppression of transmit to receive signal leakage during simultaneous transmit and receive operations;
  
  2. a summing element operatively connected between an output port of said isolation element, an output port of a low power radio frequency-digital-to-analog converter (RF-DAC) of the transmitter system, and an input port of a pre-select filter bank element for additional suppression of transmit to receive signal leakage during simultaneous transmit and receive operations, said signal leakage suppression resulting from a controlled combining of the low power DAC signal output with a receive signal output of said isolation element;
  
  3. said pre-select filter bank element being operatively connected between the isolation element'"'"'s output port and an input port of the staring receiver, for receiving RF signals from said summing element and for separating and isolating frequency block sets for further signal pre-processing in the staring receiver system;
  
  b) a staring receiver system operatively connected to said broadband antenna system for viewing and pre-processing input RF signals present in a plurality of channels at the same time, said staring receiver system comprising at least one staring receiver subsystem, said at least one staring receiver subsystem comprising;
  
  i. at least one parallel channelization, automated gain control (AGC) and signal detection pre-processor system, each AGC and signal detection pre-processor system comprising;
  
  1. a fan-out element for replicating said input RF signals into a plurality of pre-process channels along an RF spectral block;
  
  2. a plurality of pre-process channel miniature RF filters, aligned in parallel, for continuous frequency coverage along said RF spectral block, for separating and isolating a set of comparatively narrow frequency channels on a continuous basis;
  
  3. a plurality of gain control elements for providing automatic channelized level control, under intelligent process control, of said isolated channels;
  
  4. a plurality of RF signal detectors for receiving said isolated channels for detecting the presence of signals content, for further determining relative levels, center frequencies, and bandwidths; and
  
  ,5. a fan-in element for combining said plurality of level controlled, isolated channels to a common RF spectrum, thus providing a pre-processed receive RF output;
  
  ii. a set point summing amplifier for combining said pre-processed receive RF outputs and providing a combined output; and
  
  ,iii. a radio frequency-analog-to-digital converter (RF-ADC) for receiving said combined output and converting it to a digital output,wherein said at least one parallel channelization, automated gain control (AGC) and signal detection pre-processor system is configured to allow viewing and conversion of said plurality of channels on a substantially continuous basis without overloading said RF-ADC;
  
  c) a coordinated digital signal processing (DSP) array operatively connected to said staring receiver system for providing digital signal processing of the receive and transmit signal sets, on a real-time basis, as well as management of the software defined and staring cognitive communications system from the digital domain; and
  
  ,d) a transmitter system operatively connected to said DSP array and to said broadband antenna system, said transmitter system comprising at least one transmitter subsystem, said at least one transmitter subsystem comprising;
  
  i. a radio frequency-power output-digital-to-analog converter (RF-Power-DAC) for receiving at least one modulated RF signal from said DSP array, said at least one modulated RF signal having independent modulation from the other modulated RF signals for simultaneous transmission, said RF-Power-DAC having output analog filtering to adequately suppress sampling signal artifacts from above the first Nyquist band;
  
  ii. a low power radio frequency-digital-to-analog converter (RF-DAC) for receiving at least one modulated RF signal from said DSP array, said at least one modulated RF signal being negatively matched to the transmit leakage signal at the broadband antenna system'"'"'s summing element, for the purpose of further suppressing the transmit leakage in the receiver system'"'"'s RF signal input.

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Current Assignee
Rockwell Collins, Inc. (Rtx Corporation)
Original Assignee
Rockwell Collins, Inc. (Rtx Corporation)
Inventors
Abbey, Duane L., Yu, Mark K., Sasmazer, Haluk
Primary Examiner(s)
HO, DUC CHI

Application Number

US12/826,908
Time in Patent Office

762 Days
Field of Search

None
US Class Current

370/276
CPC Class Codes

H04B 1/001 Channel filtering, i.e. sel...

Multi-signal, software-defined and staring cognitive communications system

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Multi-signal, software-defined and staring cognitive communications system

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