Equalized modulation demodulation (modem) format selectable multi antenna system

• US 7,738,608 B2
• Filed: 05/06/2008
• Issued: 06/15/2010
• Est. Priority Date: 08/09/1999
• Status: Expired due to Fees

• Current Assignee: Kamilo Feher
• Original Assignee: Kamilo Feher
• Inventors: Feher, Kamilo
• Primary Examiner(s): Wang, Ted M
• Application Number:
  US12/115,936
• Publication Number:
  US 20080212656A1
• Time in Patent Office: 770 Days
• Field of Search: 375/347, 375/229, 375/232, 375/267, 375/299
• US Class Current: 375/347
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• CPC Class Codes: H04B 2201/70703 using multiple or variable rates
• CPC Class Codes: H04L 25/4902 Pulse width modulation; Pulse position modulation
• 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 27/2017 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 27/2637 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 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 7/0008 Synchronisation information channels, e.g. clock distribution lines

Abstract

Method and process for receiving, demodulating, equalizing and processing of Modulation Demodulation Format Selectable (MFS) received signal, received from two or more than two antennas and from diversity receivers. Baseband processing filtering and adaptively equalizing demodulated signals and providing filtered equalized burst operated Time Division Multiplexed (TDM) cross-correlated in-phase and quadrature phase signal, spread spectrum Code Division Multiple Access (CDMA) signal and Orthogonal Frequency Division Multiplexed (OFDM) signals. Demodulation of peak limited cross-correlated OFDM signals. Demodulation and adaptive equalization of receive filtered signal, wherein the received filtered signal is mis-matched to transmit filtered signal. Process for receiving and demodulating MFS signals received from modulated linearly amplified and transmit filtered modulated non-linearly amplified (NLA) signal transmitters. Demodulation and processing of cross-correlated TDM, spread, spectrum and OFDM signals.

Claims

1. A method comprising the steps of:

in a system comprising two antennas, receiver, demodulator and equalizer receiving, demodulating, and equalizing of a Modulation Demodulation Format Selectable (MFS) received signal, received from two antennas and providing a demodulated signal for baseband processing; and

in a baseband processor and filter baseband processing and filtering a demodulated signal and providing a first bit rate filtered equalized baseband signal and a second bit rate Orthogonal Frequency Division Multiplexed (OFDM) signal, wherein said first and second bit rate are distinct bit rates.

2. The method as in claim 1, wherein said filtered equalized baseband signal comprises cross-correlated in-phase and quadrature phase signals.

3. The method as in claim 1, wherein said filtered equalized baseband signal comprises filtered adaptive equalized cross-correlated in-phase and quadrature-phase signals and said Orthogonal Frequency Division Multiplexed (OFDM) signals are peak limited OFDM signals.

4. The method as in claim 1, wherein said MFS received signal comprises a transmit filtered cross-correlated in-phase and quadrature phase and a spread spectrum quadrature modulated signal and said baseband processing filtering and equalizing comprises baseband receive filtered signal, wherein said receive filtered signal is mis-matched to said transmit filtered signal and said demodulated signal comprises adaptive equalized cross-correlated in-phase and quadrature phase signals.

5. The method as in claim 1, wherein said MFS received signal comprises a transmit filtered cross-correlated in-phase and quadrature phase modulated signal and said baseband processing filtering and equalizing comprises baseband receive filtered signal, wherein said receive filtered signal is mis-matched to said transmit filtered signal and said demodulated signal comprises adaptive equalized cross-correlated in-phase and quadrature phase signals received from a two branch diversity receiver.

6. The method as in claim 1, wherein said Modulation Demodulation Format Selectable (MFS) received signal comprises signals received from modulated linearly amplified and transmit filtered modulated non-linearly amplified (NLA) signal transmitters, wherein said linearly amplified and NLA transmitters are distinct transmitters and said baseband processing filtering comprises baseband receive filtered signal, wherein said receive filtered signal is mis-matched to said transmit filtered signal and said demodulated signal comprises adaptive equalized cross-correlated in-phase and quadrature phase signals received from a two branch diversity receiver.

7. The method as in claim 1, wherein said bit rate filtered equalized baseband signal comprises spread spectrum cross-correlated in-phase and quadrature phase signal and burst operated Time Division Multiplexed (TDM) cross-correlated in-phase and quadrature phase signal wherein said spread spectrum and TDM signals are distinct signals.

8. The method as in claim 1, wherein said demodulated signal for baseband processing is obtained from two distinct demodulators and said MFS received signal comprises signals received from modulated linearly amplified and transmit filtered modulated non-linearly amplified (NLA) signal transmitters, wherein said linearly amplified and NLA transmitters are distinct transmitters and said baseband processing filtering comprises baseband receive filtered signal, wherein said receive filtered signal is mis-matched to said transmit filtered signal and said demodulated signal comprises adaptive equalized cross-correlated in-phase and quadrature phase signals received from a two branch diversity receiver.

9. The method as in claim 1, wherein said baseband processing provides and generates Pseudo-Error (PE) detector generated control signals for selection of said MFS received signal.

10. The method as in claim 1, wherein said filtered equalized baseband signal comprises adaptively equalized burst operated Time Division Multiplexed (TDM) cross-correlated in-phase and quadrature phase signals.

11. The method as in claim 1, wherein said receiving, demodulating, equalizing of Modulation Demodulation Format Selectable (MFS) received signal comprises non-redundant error detector generated control signals for control of Intermediate Frequency (IF) equalization.

12. The method as in claim 1, wherein said first bit rate filtered equalized baseband signal is a Collision Sense Multiple Access (CSMA) signal.

13. The method as in claim 1, wherein said first bit rate filtered equalized baseband signal is a cross-correlated in-phase and quadrature phase Code Division Multiple Access (CDMA) signal.

14. A process for:

receiving in a receiver, demodulating in a demodulator, equalizing in an equalizer a Modulation Demodulation Format Selectable (MFS) received signal, received from multiple antennas and providing demodulated equalized signal for baseband processing; and

baseband processing in a processor and filtering in a filter a demodulated equalized signal and providing a first bit rate spread spectrum signal and a second bit rate Orthogonal Frequency Division Multiplexed (OFDM) signal, wherein said first and second bit rate are distinct bit rates.

15. The process as in claim 14, wherein said spread spectrum signals comprise cross-correlated in-phase and quadrature phase signals and said OFDM signals are peak limited OFDM signals.

16. The process as in claim 14, wherein said baseband processing and filtering provides and generates Pseudo-Error (PE) detector generated control signals for selection of said MFS received signal.

17. The process as in claim 14, wherein said spread spectrum signal is a cross-correlated Code Division Multiple Access (eDMA) in-phase and quadrature-phase signal and said Orthogonal Frequency Division Multiplexed (OFDM) signals are peak limited cross-correlated OFDM signals.

18. The process as in claim 14, wherein said Modulation Demodulation Format Selectable (MFS) received signal comprises signals received from modulated linearly amplified and transmit filtered modulated non-linearly amplified (NLA) signal transmitters, wherein said linearly amplified and NLA transmitters are distinct transmitters and said baseband processing filtering comprises baseband receive filtered signal, wherein said receive filtered signal is mis-matched to said transmit filtered signal and said demodulated signal comprises adaptive equalized cross-correlated in-phase and quadrature phase signals received from a two branch diversity receiver.

19. The process as in claim 14, wherein said baseband processing and filtering comprises adaptively equalized burst operated Time Division Multiplexed (TDM) cross-correlated in-phase and quadrature phase signals.

20. The process as in claim 14, wherein said providing first bit rate spread spectrum signals comprises processing and providing burst operated Time Division Multiplexed (TDM) cross-correlated in-phase and quadrature phase signals.

21. The process as in claim 14, wherein said providing first bit rate spread spectrum signals comprises processing and providing a Collision Sense Multiple Access (CSMA) signal.

22. The process as in claim 14, wherein said equalizing of Modulation Demodulation Format Selectable (MFS) received signal comprises in-service monitor generated control signals for control of Intermediate Frequency (IF) equalization.

23. The process as in claim 14, wherein said receiving, demodulating, equalizing of Modulation Demodulation Format Selectable (MFS) received signal comprises signal reception in separate Radio Frequency (RF) bands from distinct signal transmitters.

24. The process as in claim 14, wherein said spread spectrum signals comprise MFS and Bit Rate Agile (BRA) Quadrature Amplitude Modulation (QAM) demodulated signals and said receiving, demodulating of MFS received signals is received and demodulated in distinct spread spectrum and OFDM demodulation processes.

25. The process as in claim 14, wherein said spread spectrum signals comprise MFS and Bit Rate Agile (BRA) Quadrature Amplitude Modulation (QAM) demodulated signals wherein said QAM demodulated signals are cross-correlated in-phase and quadrature phase spread spectrum signals.

26. The process as in claim 14, wherein said receiving, demodulating, equalizing of Modulation Demodulation Format Selectable (MFS) received, signal comprises signals processed in rake branches.

27. The process as in claim 14, wherein said wherein said spread spectrum signals comprise Time Constrained Signal (TCS) response and Long Response (LR) filtered cross-correlated in-phase and quadrature phase spread spectrum signals.

28. A communication system comprising:

a first, receiver, a demodulator a filter and a equalizer for receiving, demodulating filtering and equalizing a Modulation and Demodulation Format Selectable (MFS) modulated received signal, and providing a demodulated equalized baseband processed signal;

a second receiver, a demodulator and filter for receiving, demodulating and filtering a modulated received Orthogonal Frequency Division Multiplexed (OFDM) signal and providing a demodulated OFDM baseband processed OFDM signal, wherein said first or second receiver has multiple antennas and said first receiver is a different receiver than said second receiver; and

a control unit for selection and connection of the equalized baseband processed or baseband processed OFDM signal to an output port.

29. The system of claim 28, wherein said demodulated equalized baseband processed signal is an in-phase and quadrature-phase cross-correlated signal.

30. The system of claim 28, wherein said demodulated equalized baseband processed signal is a TDMA signal and a spread spectrum signal.

31. The system of claim 28, wherein said demodulated equalized baseband processed signal is obtained from two distinct demodulators and said MFS modulated received signal comprises signals received from modulated linearly amplified and transmit filtered modulated non-linearly amplified (NLA) signal transmitters, wherein said linearly amplified and NLA transmitters are distinct transmitters and said equalized baseband processed signal comprises baseband receive filtered signal, wherein said receive filtered signal is mis-matched to said transmit filtered signal and said demodulated signal comprises adaptive equalized cross-correlated in-phase and quadrature phase signals received from a two branch diversity receiver.

32. The system of claim 28, wherein said demodulated equalized baseband processed signal comprise in-phase and quadrature-phase cross-correlated spread spectrum signal and in-phase and quadrature-phase cross-correlated time division multiplex signal.

33. The system of claim 28, wherein said demodulated equalized baseband processed signal comprise Time Constrained Signal (TCS) response and Long Response (LR) filtered cross-correlated in-phase and quadrature phase spread spectrum signals.

34. The system of claim 28, wherein said demodulated equalized baseband processed signal is an adaptively equalized in-phase and quadrature-phase cross-correlated signal.