Diversity wireless systems

• US 7,545,883 B2
• Filed: 10/15/2007
• Issued: 06/09/2009
• 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 M
• Application Number:
  US11/872,527
• Publication Number:
  US 20080219362A1
• Time in Patent Office: 603 Days
• Field of Search: 375/219, 375/260, 375/299, 375/297, 375/316, 375/347
• US Class Current: 375/299
• CPC Class Codes: H04B 1/69 Spread spectrum techniques
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• 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 1/0056 Systems characterized by the type of code used H04L1/08 takes precedence
• CPC Class Codes: H04L 2025/03547 Switching between time domain structures
• CPC Class Codes: H04L 2025/03681 Control of adaptation
• CPC Class Codes: H04L 2027/0087 Out-of-band signals, (e.g. pilots)
• CPC Class Codes: H04L 25/03019 adaptive, i.e. capable of adjustment during data reception
• CPC Class Codes: H04L 25/03828 Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties partial response systems H04L25/497
• 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 27/0008 arrangements for allowing a transmitter or receiver to use more than one type of modulation negotiating modulation type for two-way transmission paths H04L5/1453
• CPC Class Codes: H04L 27/18 Phase-modulated carrier systems, i.e. using phase-shift keying H04L27/32 takes precedence
• CPC Class Codes: H04L 27/2017 in which the phase changes are non-linear, e.g. generalized and Gaussian minimum shift keying, tamed frequency modulation H04L27/201 takes precedence
• CPC Class Codes: H04L 27/2053 using more than one carrier, e.g. carriers with different phases
• CPC Class Codes: H04L 27/2071 in which the data are represented by the carrier phase, e.g. systems with differential coding
• CPC Class Codes: H04L 27/22 Demodulator circuits; Receiver circuits
• CPC Class Codes: H04L 27/2626 Arrangements specific to the transmitter only
• CPC Class Codes: H04L 27/2637 : with direct modulation of individual subcarriers
• CPC Class Codes: H04L 27/2647 : Arrangements specific to the receiver only equalisation H04L27/01
• CPC Class Codes: H04L 27/34 : Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
• CPC Class Codes: H04L 27/3405 : Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power
• CPC Class Codes: H04L 27/362 : Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated H04L27/366 takes precedence
• CPC Class Codes: H04L 27/38 : Demodulator circuits; Receiver circuits
• CPC Class Codes: H04L 7/0008 : Synchronisation information channels, e.g. clock distribution lines
• CPC Class Codes: Y02D 30/70 : in wireless communication networks

Abstract

Diversity wireless system, processor, cross-correlator, transmit baseband filter and modulator for processing, cross-correlating, filtering, modulating and providing a first and a second bit rate signal to a transmission system for transmission of the processed, filtered, modulated signal. Transmission system having two transmitters for transmission of the modulated signal. Diversity receiver system with two receivers for receiving the transmitted modulated signal and for providing received signal to a demodulator. Demodulator, receive baseband filter and receive processor for demodulation, filtering and processing received signal. Receive baseband filter for filtering is mis-matched to the transmit baseband filter for filtering of the first bit rate signal and receive processor for processing first bit rate demodulated baseband filtered signal provides received baseband mis-match filtered cross-correlated in-phase and quadrature-phase signal. Processor and transmit baseband filter for processing and filtering a signal into a cross-correlated filtered and into a cross-correlated spread spectrum in-phase and quadrature-phase baseband signal. Processor, first and second modulator for processing and baseband filtering a signal into time division multiplexed (TDM) filtered signal and into Orthogonal Frequency Division Multiplexed (OFDM) signal and for providing processed TDM filtered and processed OFDM signal to two modulators for modulation, transmission and diversity reception.

Claims

1. A system comprising:

a processor, filter, first and second modulator for processing and filtering a first bit rate signal into time division multiplexed (TDM) filtered signal and a second bit rate signal into Orthogonal Frequency Division Multiplexed (OFDM) signal and for providing processed TDM filtered signal to first modulator and processed OFDM signal to second modulator for modulation and transmission of the modulated signal;

a transmission system comprising two distinct transmitters for transmission of the modulated signal, wherein said distinct transmitters comprise a first amplifier operated in a linear or a linearized mode and a second amplifier operated in a nonlinear or saturated mode;

a receiver system comprising two receivers for receiving a Radio Frequency (RF) signal and for providing received RF signal to a demodulator system for demodulation of received signal; and

a demodulator system comprising a demodulator, filter and processor for demodulation, filtering and processing received signal.

2. The system of claim 1, wherein said time division multiplexed (TDM) filtered signal is used in a time division multiple access (TDMA) system.

3. The system of claim 1, wherein said time division multiplexed (TDM) filtered signal comprises a cross-correlated in-phase and quadrature-phase filtered signal used in a time division multiple access (TDMA) system and a distinct.

4. The system of claim 1, wherein said demodulator comprises a demodulator filter, and wherein said filter for processing and filtering a first bit rate signal and said demodulator filter are mis-matched filters and wherein said demodulator filter and processor for demodulation, filtering and processing received signal comprises a filter and processor for filtering and processing demodulated signals into cross-correlated in-phase and quadrature-phase signals.

5. A system comprising:

a processor, filter, first and second modulator for processing and filtering a first bit rate signal into time division multiplexed (TDM) filtered signal and a second bit rate signal into Orthogonal Frequency Division Multiplexed (OFDM) signal and for providing processed TDM filtered signal to first modulator and processed OFDM signal to second modulator for modulation and transmission of the modulated signal;

a transmission system comprising two distinct transmitters for transmission of the modulated signal;

a receiver system comprising two receivers for receiving a Radio Frequency (RF) signal and for providing received RF signal to a demodulator system for demodulation of received signal, wherein the receiver comprises a diversity receiver and a non-linear Automatic Gain Control (AGC) circuit operated in a non-linear mode; and

a demodulator system comprising a demodulator, filter and processor for demodulation, filtering and processing received signal.

6. The system of claim 5, wherein said time division multiplexed (TDM) filtered signal is used in a time division multiple access (TDMA) system and wherein said demodulator comprises a demodulator filter and said filter for processing and filtering a first bit rate signal and said demodulator filter are mis-matched filters and wherein said demodulator filter and processor for demodulation, filtering and processing received signal comprises a filter and processor for filtering and processing demodulated signals into cross-correlated in-phase and quadrature-phase signals.

7. A system comprising:

a processor, filter, first and second modulator for processing and filtering a first bit rate signal into time division multiplexed (TDM) filtered signal and a second bit rate signal into Orthogonal Frequency Division Multiplexed (OFDM) signal and for providing processed TDM filtered signal to first modulator and processed OFDM signal to second modulator for modulation and transmission of the modulated signal;

a transmission system comprising two distinct transmitters for transmission of the modulated signal;

a receiver system comprising two receivers for receiving a Radio Frequency (RF) signal and for providing received RF signal to a demodulator system for demodulation of received signal, wherein the receiver comprises a Non-Redundant Error Detection (NRED) circuit for error detection of the received signal; and

a demodulator system comprising a demodulator, filter and processor for demodulation, filtering and processing received signal.

8. The system of claim 7, wherein said time division multiplexed (TDM) filtered signal is used in a time division multiple access (TDMA) system.

9. A system comprising:

a processor, filter, first and second modulator for processing and filtering a first bit rate signal into time division multiplexed (TDM) filtered signal and a second bit rate signal into Orthogonal Frequency Division Multiplexed (OFDM) signal and for providing processed TDM filtered signal to first modulator and processed OFDM signal to second modulator for modulation and transmission of the modulated signal;

a transmission system comprising two distinct transmitters for transmission of the modulated signal;

a receiver system comprising two receivers for receiving a Radio Frequency (RF) signal and for providing received RF signal to a demodulator system for demodulation of received signal, wherein said filter for processing and filtering a first bit rate signal and said demodulator filter are mis-matched filters and wherein said demodulator filter and processor for demodulation, filtering and processing received signal comprise a filter and processor for filtering and processing demodulated signals into cross-correlated in-phase and quadrature-phase signals; and

a demodulator system comprising a demodulator, demodulator filter and processor for demodulation, filtering and processing received signal.

10. The system of claim 9, wherein said time division multiplexed (TDM) filtered signal comprises a Gaussian filtered signal used in a time division multiple access (TDMA) system.

11. A system comprising:

a processor, filter, first and second modulator for processing and filtering a first bit rate signal into time division multiplexed (TDM) filtered signal and a second bit rate signal into Orthogonal Frequency Division Multiplexed (OFDM) signal and for providing processed TDM filtered signal to first modulator and processed OFDM signal to second modulator for modulation and transmission of the modulated signal;

a transmission system comprising two distinct transmitters for transmission of the modulated signal;

a receiver system comprising two receivers for receiving a Radio Frequency (RF) signal and for providing received RF signal to a demodulator system for demodulation of received signal; and

a demodulator system comprising a demodulator, a demodulator filter and processor for demodulation, filtering and processing received signal, wherein said demodulator, filter and processor for demodulation, filtering and processing received signal comprises a filter and processor for filtering and processing demodulated signals into cross-correlated in-phase and quadrature-phase signals and said demodulator comprises a selector or combiner for selecting or combining the demodulated signal, received from two receivers and wherein said receiver comprises a diversity receiver.

12. The system of claim 11, wherein said time division multiplexed (TDM) filtered signal is used in a time division multiple access (TDMA) system.

13. A system comprising:

a processor, filter, first and second modulator for processing and filtering a first bit rate signal into time division multiplexed (TDM) filtered signal and a second bit rate signal into Orthogonal Frequency Division Multiplexed (OFDM) signal and for providing processed TDM filtered signal to first modulator and processed OFDM signal to second modulator for modulation and transmission of the modulated signal;

a transmission system comprising two distinct transmitters for transmission of the modulated signal;

a receiver system comprising two receivers for receiving a Radio Frequency (RF) signal and for providing received RF signal to a demodulator system for demodulation of received signal; and

a demodulator system comprising a demodulator, a demodulator filter and processor for demodulation, filtering and processing received signal, wherein said TDM filtered signal is a cross-correlated in-phase and quadrature-phase signal and wherein said filter for processing and filtering a first bit rate signal and said demodulator filter are mis-matched filters and wherein said demodulator filter and processor for demodulation, filtering and processing received signal comprises a filter and processor for filtering and processing demodulated signals into cross-correlated in-phase and quadrature-phase signals.

14. The system of claim 13, wherein said time division multiplexed (TDM) filtered signal comprises cross-correlated in-phase and quadrature-phase Gaussian filtered signals.

15. A system comprising:

a processor, filter, first and second modulator for processing and filtering a first bit rate signal into time division multiplexed (TDM) filtered signal and a second bit rate signal into Orthogonal Frequency Division Multiplexed (OFDM) signal and for providing processed TDM filtered signal to first modulator and processed OFDM signal to second modulator for modulation and transmission of the modulated signal, wherein said TDM filtered signal is a spread spectrum cross-correlated in-phase and quadrature-phase signal;

a transmission system comprising two distinct transmitters for transmission of the modulated signal;

a receiver system comprising two receivers for receiving a Radio Frequency (RF) signal and for providing received RF signal to a demodulator system for demodulation of received signal; and

a demodulator system comprising a demodulator, filter and processor for demodulation, filtering and processing received signal.

16. The system of claim 15, wherein said OFDM signal is a cross-correlated peak limited in-phase and quadrature-phase signal.

17. A system comprising:

a processor, filter, first and second modulator for processing and filtering a first bit rate signal into time division multiplexed (TDM) filtered signal and a second bit rate signal into Orthogonal Frequency Division Multiplexed (OFDM) signal and for providing processed TDM filtered signal to first modulator and processed OFDM signal to second modulator for modulation and transmission of the modulated signal, wherein said OFDM signal is a peak limited cross-correlated in-phase and quadrature-phase signal and said TDM filtered signal is a cross-correlated in-phase and quadrature-phase filtered signal;

a transmission system comprising two distinct transmitters for transmission of the modulated signal;

a receiver system comprising two receivers for receiving a Radio Frequency (RF) signal and for providing received RF signal to a demodulator system for demodulation of received signal; and

a demodulator system comprising a demodulator, filter and processor for demodulation, filtering and processing received signal.

18. The system of claim 17, wherein said time division multiplexed (TDM) filtered signal comprises a cross-correlated in-phase and quadrature-phase Gaussian filtered signal used in a time division multiple access (TDMA) system.

19. A system comprising:

a processor, filter, first and second modulator for processing and filtering a first bit rate signal into time division multiplexed (TDM) filtered signal and a second bit rate signal into Orthogonal Frequency Division Multiplexed (OFDM) signal and for providing processed TDM filtered signal to first modulator and processed OFDM signal to second modulator for modulation and transmission of the modulated signal;

a transmission system comprising two distinct transmitters for transmission of the modulated signal, wherein said transmission system comprising two distinct transmitters for transmission of the modulated signal comprises a non-linearly amplified transmitter for transmission of modulated TDM signal and a distinct linearly amplified transmitter for transmission of the OFDM signal;

a receiver system comprising two receivers for receiving a Radio Frequency (RF) signal and for providing received RF signal to a demodulator system for demodulation of received signal; and

a demodulator system comprising a demodulator, filter and processor for demodulation, filtering and processing received signal.

20. The system of claim 19, wherein said time division multiplexed (TDM) filtered signal comprises a cross-correlated in-phase and quadrature-phase Gaussian filtered signal used in a time division multiple access (TDMA) system and said OFDM signal is a cross-correlated in-phase and quadrature-phase filtered, peak limited signal.

21. A system comprising:

a processor, filter, first and second modulator for processing and filtering a first bit rate signal into time division multiplexed (TDM) filtered signal and a second bit rate signal into Orthogonal Frequency Division Multiplexed (OFDM) signal and for providing processed TDM filtered signal to first modulator and processed OFDM signal to second modulator for modulation and transmission of the modulated signal;

a transmission system comprising two distinct transmitters for transmission of the modulated signal;

a receiver system comprising two receivers for receiving a Radio Frequency (RF) signal and for providing received RF signal to a demodulator system for demodulation of received signal, wherein said demodulator comprises a pseudo-error detector; and

a demodulator system comprising a demodulator, filter and processor for demodulation, filtering and processing received signal.

22. The system of claim 21, wherein said time division multiplexed (TDM) filtered signal comprises a cross-correlated in-phase and quadrature-phase Gaussian filtered signal and said OFDM signal comprises a in-phase and quadrature-phase filtered signal.

23. A system comprising:

a processor, filter, first and second modulator for processing and filtering a first bit rate signal into time division multiplexed (TDM) filtered signal and a second bit rate signal into Orthogonal Frequency Division Multiplexed (OFDM) signal and for providing processed TDM filtered signal to first modulator and processed OFDM signal to second modulator for modulation and transmission of the modulated signal, wherein said filter for filtering a first bit rate signal into time division multiplexed (TDM) filtered signal comprises Bit Rate Agile (BRA) Time Constrained Signal (TCS) response processor and Long Response (LR) filters and provides filtered cross-correlated in-phase and quadrature-phase signal;

a transmission system comprising two distinct transmitters for transmission of the modulated signal;

a receiver system comprising two receivers for receiving a Radio Frequency (RF) signal and for providing received RF signal to demodulator system for demodulation of received signal; and

a demodulator system comprising a demodulator, filter and processor for demodulation, filtering and processing received signal.

24. The system of claim 23, wherein said time division multiplexed (TDM) filtered signal is used in a time division multiple access (TDMA) system and wherein said demodulator comprises a demodulator filter and said filter for processing and filtering a first bit rate signal and said demodulator filter are mis-matched filters and wherein said demodulator filter and processor for demodulation, filtering and processing received signal comprises a filter and processor for filtering and processing demodulated signals into cross-correlated in-phase and quadrature-phase signals.