EQUALIZED MODULATION DEMODULATION (MODEM) FORMAT SELECTABLE MULTI ANTENNA SYSYTEM

• US 20080212656A1
• Filed: 05/06/2008
• Published: 09/04/2008
• Est. Priority Date: 08/09/1999
• Status: Active Grant

• Current Assignee: Kamilo Feher
• Original Assignee: Kamilo Feher
• Inventors: Feher, Kamilo
• Granted Patent: US 7,738,608 B2
• Time in Patent Office: Days
• US Class Current: 375/150
• 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:

receiving, demodulating, equalizing of Modulation Demodulation Format Selectable (MFS) received signal, received from two antennas and providing demodulated signal for baseband processing; and

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

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

5. 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.

6. 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.

7. 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.

8. 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.

9. The method as in claim 1, wherein said 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.

10. 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.

11. 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.

2. A method for:

receiving, demodulating, equalizing of Modulation Demodulation Format Selectable (MFS) received signal, received from two or more than two antennas and providing demodulated equalized signal for baseband processing; and

baseband processing and filtering said demodulated equalized signal and providing cross-correlated in-phase and quadrature phase filtered baseband signals and Orthogonal Frequency Division Multiplexed (OFDM) signals, wherein said cross-correlated and OFDM signals are distinct signals.

12. The method as in claim 2, wherein said cross-correlated in-phase and quadrature phase filtered baseband signal is a spread spectrum Code Division Multiple Access (CDMA) in-phase and quadrature-phase signal and said Orthogonal Frequency Division Multiplexed (OFDM) signals are peak limited OFDM signals.

13. The method as in claim 2, wherein said cross-correlated in-phase and quadrature phase filtered baseband signal comprises cross-correlated burst operated Time Division Multiplexed (TDM) and cross-correlated Code Division Multiple Access (CDMA) signal.

14. The method as in claim 2, wherein said Orthogonal Frequency Division Multiplexed (OFDM) signals are peak limited OFDM signals.

15. The method as in claim 2, wherein said cross-correlated signals comprise cross-correlated Gaussian filtered adaptively equalized signals.

3. A process for:

receiving, demodulating, equalizing of Modulation Demodulation Format Selectable (MFS) received signal, received from multiple antennas and providing demodulated equalized signal for baseband processing; and

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

16. The process as in claim 3, wherein said spread spectrum signals comprise cross-correlated in-phase and quadrature phase signals and said OFDM signals are peak limited OFDM signals.

17. The process as in claim 3, wherein said baseband processing and filtering provides and generates Pseudo-Error (PE) detector generated control signals for selection of said MFS received signal.

18. The process as in claim 3, wherein said spread spectrum signal is a cross-correlated Code Division Multiple Access (CDMA) in-phase and quadrature-phase signal and said Orthogonal Frequency Division Multiplexed (OFDM) signals are peak limited cross-correlated OFDM signals.

19. The process as in claim 3, 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.

20. The process as in claim 3, wherein said baseband processing and filtering comprises adaptively equalized burst operated Time Division Multiplexed (TDM) cross-correlated in-phase and quadrature phase signals.