Adaptive receivers for bit rate agile (BRA) and modulation demodulation (modem) format selectable (MFS) signals

• US 7,376,180 B2
• Filed: 04/23/2004
• Issued: 05/20/2008
• Est. Priority Date: 08/10/1998
• Status: Expired due to Fees

• Current Assignee: Kamilo Feher
• Original Assignee: Kamilo Feher
• Inventors: Feher, Kamilo
• Primary Examiner(s): Wang, Ted
• Application Number:
  US10/831,562
• Publication Number:
  US 20040208243A1
• Time in Patent Office: 1,488 Days
• Field of Search: 375/232, 375/219, 375/229, 375/297, 375/316, 375/329
• US Class Current: 375/232
• CPC Class Codes: H04B 2201/70703 using multiple or variable rates
• CPC Class Codes: H04B 7/0871 using different reception schemes, at least one of them being a diversity reception scheme
• CPC Class Codes: H04L 25/4902 Pulse width modulation; Pulse position modulation
• CPC Class Codes: H04L 27/00 Modulated-carrier systems
• CPC Class Codes: H04L 27/0004 using wavelets
• CPC Class Codes: H04L 27/18 Phase-modulated carrier systems, i.e. using phase-shift keying H04L27/32 takes precedence
• CPC Class Codes: H04L 27/2637 with direct modulation of individual subcarriers
• CPC Class Codes: H04L 27/34 Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
• CPC Class Codes: H04L 7/0008 Synchronisation information channels, e.g. clock distribution lines

Abstract

Systems, apparatus, and methods for new generations of wireless systems, including multiple standard, interoperable Third-Generation (3G) and Second-Generation (2G), Spread Spectrum CDMA, WCDMA, GSM, Enhanced GSM systems and CSMA, TDMA and OFDM. Bit Rate Agile (BRA), Modulation and Code Selectable processing techniques of Gaussian Minimum Shift Keying (GMSK), Quadrature Phase Shift Keying (QPSK), Quadrature Amplitude Modulation (QAM), and of Mis-Matched demodulator filters in which the demodulator filter set is mismatched to the filter set of the signal modulator.

Claims

1. An adaptive equalizer structure comprising:

an interface receiver port to provide connection of received Bit Rate Agile (BRA) and Modulation Demodulation (Modem) Format Selectable (MFS) modulated signal to a pre-demodulation adaptive equalizer;

the pre-demodulation adaptive equalizer structure comprising BRA and MFS splitter, multiplier circuit and delay structure for delaying the modulated signal in one branch of the splifter and coupling the time delayed signal in one branch of the splifter and the said received modulated signal in the other branch of the splitter to a signal combiner;

a BRA and MFS signal combiner structure for combining the delayed modulated signal and received modulated signal;

a BRA and MFS demodulator structure for demodulating the combined delayed signal and received modulated signal; and

a BRA and MFS control signal processor for generation of and connection of said control signal to the multiplier circuit.

2. The structure as in claim 1, wherein said interface receiver port comprises two distinct radio receivers.

3. The structure as in claim 1, wherein said BRA and MFS demodulator provides demodulated cross-correlated filtered in-phase and quadrature-phase baseband signals and comprises a post demodulation adaptive equalizer for adaptive equalization of the demodulated signal.

4. The structure as in claim 1, wherein said Bit Rate Agile (BRA) and Modulation Demodulation (Modem) Format Selectable (MFS) modulated signal comprises burst operated Time Division Multiplexed (TDM) and Orthogonal Frequency Division Multiplex (OFDM) signals.

5. An adaptive equalizer and switchable delay structure comprising:

an interface receiver port to provide connection and process received modulated Bit Rate Agile (BRA) and Modulation Demodulation (Modem) Format Selectable (MFS) modulated signal to a plurality of splitters, amplifiers, delay elements, signal combiners and signal switches for signal selection of the processed received modulated signal;

a demodulator structure for demodulating the selected received BRA and MFS modulated signal; and

a control signal processor for generation of said control signal to control the BRA and MFS signal selection.

6. The structure as in claim 5, wherein said interface receiver port comprises two antennas and two radio receivers.

7. The structure as in claim 5, wherein said demodulator provides demodulated cross-correlated filtered in-phase and quadrature-phase basehand signals.

8. The structure as in claim 5, wherein said control signal processor for generation of said control signal to control the BRA and MFS signal selection is obtained from a Non-Redundant Error Detection (NRFD) circuit.

9. A receiver structure for reception, demodulation, adaptive equalization and signal processing of Bit Rate Agile (BRA), Modulation Demodulation (Modem) Format Selectable (MFS) and Code Selectable (CS) modulated received signals comprising:

(a) means for two antennas for receiving BRA, MFS and CS modulated received signals and for providing said received signals to input ports for receiving input signals, wherein said two antennas are used in a diversity mode of operation;

(b) means for input ports and a receiver for connection of the received signals to a BRA, MFS and CS demodulator;

(c) means for a BRA, MFS and CS demodulator for demodulation and signal processing; and

(d) means for an adaptive equalizer and for a selector for adaptive equalization and selection of one or more of the demodulated signals, wherein, said demodulator for one of the selected signals provides cross-correlated in-phase and quadrature phase demodulated baseband signals.

10. The structure as in claim 9, wherein said two antennas for receiving BRA, MFS and CS modulated received signals receive signals in separate Radio Frequency (RF) bands.

11. The structure as in claim 9, wherein said demodulator for demodulation and signal processing comprises two distinct demodulators.

12. A Bit Rate Agile (BRA), Modulation Demodulation (Modem) Format Selectable (MFS) and Code Selectable (CS) signal receiver, demodulator and adaptive equalizer structure comprising:

(a) a two branch diversity receiver for receiving and for providing connection of received BRA, MFS and CS filtered quadrature modulated signals to a demodulator;

(b) a demodulator structure to serve for signal demodulation of the received signals, wherein said demodulator provides cross-correlated in-phase and quadrature phase demodulated baseband signals; and

(c) an adaptive equalizer and selector structure for equalization and selection of the demodulated signal.

13. The structure as in claim 12, wherein said adaptive equalizer structure comprises an adaptive equalizer which is receiving Pseudo-Error (PE) detector generated control signals.

14. The structure as in claim 12, wherein said received quadrature modulated signals are generated by two distinct quadrature modulators.

15. The structure as in claim 12, wherein said Bit Rate Agile (BRA), Modulation Demodulation (Modem) Format Selectable (MFS) and Code Selectable (CS) signal receiver, demodulator receives and demodulates Time Division Multiple Access (TDMA), Orthogonal Frequency Division Multiplex (OFDM) and spread spectrum modulated signals.

17. The structure as in claim 12, wherein said demodulator structure comprises demodulation and processing circuitry for demodulation and processing of burst operated, Orthogonal Frequency Division Multiplex (OFDM) and spread spectrum modulated signals.

16. An adaptive equalizer structure comprising:

(a) an interface receiver port to provide connection of received Bit Rate Agile (BRA), Modulation Demodulation (Modem) Format Selectable (MFS) and Code Selectable (CS) modulated signal to a pre-demodulation adaptive equalizer;

(b) a pre-demodulation BRA, MFS and CS adaptive equalizer structure comprising splitter, signal multiplier circuit and delay structure for generating a delayed signal and received modulated signal in at least two splitter branches and coupling the delayed signal in one branch of the splitter and the received modulated signal in the other branch of the splitter to a signal combiner;

(c) a signal combiner structure for combining the delayed signal and received modulated signal;

(d) a demodulator structure for demodulating the combined delayed signal and received modulated signal; and

(e) a control signal processor for generation of and connection of a BRA, MFS and CS control signal to the signal multiplier circuit.

18. The structure as in claim 16, wherein said control signal processor for generation of control signal to the signal multiplier circuit comprises a Pseudo-Error (PE) detector for processing and generating PE control signals.

19. An adaptive equalizer and switchable signal selection structure comprising:

a cross-correlator and a first filter for providing first bit rate cross-correlated filtered in-phase and quadrature-phase baseband signal to a first quadrature modulator;

a first quadrature modulator for quadrature modulation of the cross-correlated filtered in-phase and quadrature-phase baseband signal;

a first Radio Frequency (RE) amplifier, operated in a first RE band for amplification of the first quadrature modulator modulated signal and for providing the first amplifier amplified signal to a first antenna;

a first antenna for transmission of the first amplifier amplified signal;

a baseband network for providing a second bit rate processed baseband signal to a second modulator for modulation of said second hit rate baseband signal;

a second modulator for modulation of said second bit rate baseband signal and for providing said second bit rate modulated signal to a second RF amplifier for signal amplification and for providing amplified signals to a second antenna, wherein said second RF amplifier uses a different RF band than said first RF amplifier;

a two branch diversity receiver for providing connection of received modulated signals to a demodulator and selector, for signal demodulation and selection of one or more of the received modulated signals;

a demodulator structure for demodulation of one or more than one of the selected received signals, wherein said demodulator for demodulation of the first bit rate signal comprises a second filter which is mis-matched to the first filter; and

an adaptive equalizer structure for adaptive equalization of one or more of the demodulated signals.

20. The structure as in claim 19, wherein said adaptive equalizer structure for adaptive equalization of one or more of the demodulated signals receives control signals generated by a Now-Redundant Error Detection (NRED) circuitry for control of the adaptive equalizer.

21. The structure as in claim 19, wherein said baseband network for receiving, processing and for providing a second bit rate processed and shaped baseband signal to a second modulator comprises a processor and cross-correlator for processing and for providing cross-correlated spread spectrum in-phase and quadrature-phase baseband signals.

22. The structure as in claim 19, wherein said first Radio Frequency (RF) amplifier, is operated in a non-linearly amplified (NLA) mode and said second RF amplifier is operated in a linearly amplified mode.

23. A communication and adaptive equalizer system comprising:

a first cross-correlator, a first processor and a first filter for providing a first bit rate processed cross-correlated filtered in-phase and quadrature-phase baseband signal;

a second cross-correlator and a second processor for providing a second bit rate cross-correlated spread spectrum in-phase and quadrature-phase baseband signal, wherein said second bit rate is ditTerent from said first bit rate;

a selector for selecting and for providing said first bit rate cross-correlated filtered or said second bit rate cross-correlated spread spectrum in-phase and quadrature-phase baseband signal to a quadrature modulator system;

a quadrature modulator system for quadrature modulation of the selected first bit rate or second bit rate signal;

a signal transmitter for transmission of the selected quadrature modulated signal; and

a receiver and a demodulator for reception and demodulation of the transmitted first and second bit rate signal, wherein said demodulator for demodulation of the first bit rate signal comprises an adaptive equalizer for adaptive equalization of the received first bit rate signal and a filter which is mis-matched to said first filter.

24. The system as in claim 23, wherein said first cross-correlator, first processor and first filter provide in a burst operated Time Division Multiple Access (TDMA) system a Gaussian shaped and filtered cross-correlated in-phase and quadrature-phase baseband signal for Gaussian Minimum Sluft Keying (GMSK) modulated systems.

25. The system as in claim 23, wherein said second cross-correlator and second processor provide cross-correlated spread spectrum signals which are cross-correlated digital Code Division Multiple Access (CDMA) in-phase and quadrature-phase baseband signals.

26. The system as in claim 23, wherein said first cross-correlator provides burst operated Time Division Multiple Access (TDMA) in-phase and quadrature-phase baseband signals.

27. A communication and adaptive equalizer system comprising:

a first cross-correlator, a first processor and a first filter for providing a first bit rate processed cross-correlated filtered in-phase and quadrature-phase baseband signal;

a second processor and second filter for providing a second bit rate and a third bit rate processed filtered baseband signal wherein said first bit rate is different from said second bit rate and said third bit rate is different from said first and from said second bit rate;

a first modulator for quadrature modulation of the first bit rate processed cross-correlated signal and for providing the quadrature modulated signal to a first transmitter;

a first trausmifter for transmission of the first modulator provided quadrature modulated signal;

a second modulator for modulation and transmission of the second bit rate and third bit rate processed filtered baseband signal and for providing the filtered modulated signal to a second transmitter;

a second transmitter for transmission of the second modulator provided filtered modulated signal; and

a receiver and a demodulator for reception and demodulation of the transmitted first, second and third bit rate signal, wherein said demodulator for demodulation of the first bit rate signal provides cross-correlated in-phase and quadrature-phase signals and comprises an adaptive equalizer for adaptive equalization of the received first bit rate signal and a filter which is mis-matched to said first filter.

28. The system as in claim 27, wherein said first bit rate signal is a burst operated Time Division Multiple Access (TDMA) signal, said second bit rate signal is a spread spectrum signal and said third bit rate signal is an Orthogonal Frequency Division Multiplexed (OFDM) signal.

29. The system as in claim 27, wherein said tirst cross-correlator provides a burst operated Gaussian shaped and filtered cross-correlated in-phase and quadrature-phase baseband signal for Gaussian Minimum Shift Keying (GMSK) modulated systems.

30. The system as in claim 27, wherein said second processor and second filter provide processed spread spectrum cross-correlated filtered in-phase and quadrature-phase baseband signal.

31. A communication and adaptive equalizer system comprising:

a processor and a first filter for processing and providing processed and filtered baseband signal to a first modulator;

a first modulator for modulation of the processed and filtered baseband signal;

a first amplifier, operated in a non-linearly amplified (NLA) mode, for non-linear amplification of said first modulator modulated signal and for providing the NLA signal to a first antenna;

a first antenna for transmission of the NLA modulated signal;

a bit rate agile (BRA) baseband processor for processing and for providing processed BRA baseband signals to a second modulator for quadrature amplitude modulation (QAM), wherein said second modulator is a quadrature modulator;

the second quadrature modulator for QAM of BRA baseband signals and for providing said QAM modulated signals to a second amplifier for signal amplification and for providing amplified signals to a second and to a third antenna for signal transmission, wherein said QAM modulated signal amplifier is operated in a linearly amplified mode; and

a receiver, demodulator and adaptive equalizer for reception, demodulation and adaptive equalization of the selected transmitted non-linearly amplified (NLA) signal and of the QAM linearly amplified signal, wherein said demodulator for demodulation of the NLA signal comprises a filter which is mis-matched to said first filter.

32. The system as in claim 31, wherein said processor for processing and providing processed baseband signal to a first modulator comprises a cross-correlator for providing in-phase and quadrature-phase cross-correlated baseband signals to said first modulator and said first modulator is a quadrature modulator.

33. The system as in claim 31, wherein said processor for processing and providing processed baseband signal to a first modulator comprises an in-phase and quadrature-phase baseband processor for providing in-phase and quadrature-phase spread spectrum baseband signals to said first modulator and said first modulator is a quadrature modulator.

34. The system as in claim 31, wherein said first antenna, second and third antenna transmit signals in separate Radio Frequency (RF) bands.

35. The system as in claim 31, wherein said second and third antenna transmit signals in the same Radio Frequency (RF) band.

36. The system as in claim 31, wherein said demodulator and mis-matched filter provide demodulated cross-correlated filtered in-phase and quadrature-phase baseband signals.

37. A communication and adaptive equalizer system comprising:

a first baseband processor, cross-correlator and first filter for processing and providing a first bit rate cross-correlated filtered in-phase and quadrature-phase baseband signals to a first quadrature modulator;

a first quadrature modulator for quadrature modulation of the cross-correlated filtered in-phase and quadrature-phase baseband signals;

a first Radio Frequency (RE) amplifier, operated in a non-linearly amplified (NLA) mode, for NLA amplification of said cross-correlated filtered, first quadrature modulator modulated signal and for providing the NLA signal to an antenna;

a first antenna for transmission of the NLA modulated signal;

a second baseband processor for processing and for providing a second bit rate baseband signal to a second modulator for modulation of said second bit rate baseband signal;

a second modulator for modulation of said second bit rate baseband signal and for providing said second bit rate modulated signal to a second RF amplifier for signal amplification and for providing amplified signals to a second antenna, wherein said second bit rate modulated signal and said second RF amplifier use different RE bands than said first quadrature modulated signal and said first RF amplifier;

a receiver and a demodulator for reception and demodulation of the transmitted first and second bit rate signal, wherein said demodulator for demodulation of the first bit rate signal comprises an adaptive equalizer for adaptive equalization of the first bit rate signal and provides demodulated cross-correlated in-phase and quadrature-phase baseband signals.

38. The system as in claim 37, wherein said second baseband processor comprises a cross-correlator and provides cross-correlated spread spectrum signals which are cross-correlated digital Code Division Multiple Access (CDMA) in-phase and quadrature-phase baseband signals.

39. The system as in claim 37, wherein said demodulator comprises a filter which is mis-matched to said first filter.

40. The system as in claim 37, wherein said receiver and demodulator for reception and demodulation of the transmitted first and second bit rate signal comprises two or more distinct receivers and two or more distinct demodulators.