Spectrally efficient FQPSK, FGMSK, and FQAM for enhanced performance CDMA, TDMA, GSM, OFDM, and other systems

• US 20030048834A1
• Filed: 07/24/2002
• Published: 03/13/2003
• Est. Priority Date: 08/10/1998
• Status: Active Grant

• Current Assignee: Quarterhill Inc. (f/k/a Wi-LAN Inc.)
• Original Assignee: Kamilo Feher
• Inventors: Feher, Kamilo
• Granted Patent: US 7,133,456 B2
• Time in Patent Office: Days
• US Class Current: 375/219
• CPC Class Codes: H04B 2201/70703 using multiple or variable rates
• CPC Class Codes: H04B 7/0602 using antenna switching H04B7/0686 takes precedence; antenna beam directivity switching H01Q3/24
• CPC Class Codes: H04B 7/0854 using error minimizing algorithms, e.g. minimum mean squared error [MMSE], "cross-correlation" or matrix inversion
• CPC Class Codes: H04L 1/205 jitter monitoring
• CPC Class Codes: H04L 2025/03414 Multicarrier
• CPC Class Codes: H04L 25/0305 using blind adaptation
• CPC Class Codes: H04L 25/0307 using blind adaptation
• 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 27/01 Equalisers baseband equalizers at the transmitter end H04L25/03343; in analogue transmission systems H04B3/04, H04B7/005
• CPC Class Codes: H04L 27/18 Phase-modulated carrier systems, i.e. using phase-shift keying H04L27/32 takes precedence
• CPC Class Codes: H04L 27/186 in which the information is carried by both the individual signal points and the subset to which the individual signal points belong, e.g. coset coding or related schemes
• 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 5/0008 Wavelet-division
• CPC Class Codes: H04L 5/0016 Time-frequency-code
• CPC Class Codes: H04L 5/0028 Variable division signaling therefor H04L5/0092
• 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

Spectral efficient transmitters-receivers (transceivers), modulation-demodulation (Modem) methods, architectures, structures and implementation technologies for enhanced performance and increased capacity CDMA, TDMA, GSM, OFDM, CMA, FDM and other wireless and wired communications, broadcasting and telemetry systems and integrated Modems/Transceivers suitable for operation over Non-Linearly Amplified (NLA) power efficient RF systems are described. Cross-correlated cascaded Time Constrained Signal (TCS) response processors and Long Response (LR) filtered Bit Rate Agile (BRA) in phase (I) and quadrature phase (Q) baseband signals are disclosed. These spectral efficient high performance processing, transmitting and receiving methods are designated as Feher'"'"'s Quadrature Phase Shift Keying (FQPSK) Transceivers. Integrated Modem and transceiver technologies also disclosed herein and designated as Feher'"'"'s Quadrature Amplitude Modulation (FQAM), Feher'"'"'s Gaussian Minimum Shift Keying (FGMSK) and Feher'"'"'s Minimum Shift Keying (FMSK) are subsets of 2nd generation FQPSK systems. Bit rate and RF agile embodiments are described. The 2nd generation of FQPSK systems with Adaptive Antenna Arrays (AAA) and adaptive Feher Equalizers (FE) and smart diversity systems has additional enhanced spectral/RF power efficiency and end-to-end performance advantages.

Claims

1. A bit rate agile communication system comprising:

a baseband signal processing network receiving parallel baseband signal streams and generating combined Time Constrained Signal (TCS) response and Long Response (LR) filtered in-phase and quadrature-phase baseband signals; and

a quadrature modulator receiving and quadrature modulating said Time Constrained Signal (TCS) response and Long Response (LR) filtered in-phase and quadrature-phase baseband signals to generate a quadrature modulated bit rate agile output signal.

2. The bit rate agile system in claim 1, further comprising:

a transmit amplifier receiving said quadrature modulated output signal and generating an amplified transmit signal for coupling to a transmission medium.

3. The bit rate agile system in claim 1, further comprising:

a demodulator receiving and demodulating said bit rate agile transmit signal.

4. A Bit Rate Agile (BRA) structure comprising:

a baseband signal processing network for receiving baseband signal streams and providing cascaded Bit Rate Agile (BRA) Time Constrained Signal (TCS) response and Long Response (LR) filtered in phase and quadrature phase baseband signals;

a Quadrature Modulator serving to quadrature modulate said cascaded Time Constrained Signal (TCS) response and Long Response (LR) filtered in phase and quadrature phase baseband signals;

an interface transmitter port to provide said quadrature modulated signal to the transmission medium;

an interface receiver port to provide connection of the said filtered quadrature modulated signal to the demodulator; and

a demodulator structure to serve for signal demodulation having Bit Rate Agile (BRA) demodulation filters Mis-Matched (MM) to that of the modulator filters.

5. A structure comprising:

a input port for receiving baseband signals; and

a baseband signal processing network for receiving said baseband signals and providing cross-correlated bit rate agile cascaded mis-matched (ACM) processed and filtered in-phase and quadrature-phase baseband signals.

6. A signal processing, modulation, transmission, signal reception and demodulation system, for Bit Rate Agile (BRA), Modulation Demodulation (Modem) Format Selectable (MFS) and Code Selectable (CS) systems comprising:

(a) means for input port for receiving input data;

(b) splitter means serving for BRA, MFS and CS signal splitting, having an input coupled to said input port, and serving to split said input data into baseband signal streams;

(c) means for BRA, MFS and CS baseband signal processing;

(d) means for receiving said baseband signal stream and providing for BRA, MFS and CS systems changeable amounts of cross-correlation between Time Constrained Signal (TCS) response processors combined with TCS and Long Response (LR) processors;

(e) means for cross-correlated processed in phase (I) and quadrature (Q) phase baseband signals for quadrature modulation to the I and Q input ports of the Quadrature Modulator (QM);

(f) means for an interface unit to provide said quadrature modulated data to the transmission medium;

(g) means for a receiver interface unit for connection of the received cross-correlated signal to the BRA and MFS demodulator;

(h) means for BRA, MFS and CS demodulation; and

(i) means for post-demodulation Mis-Matched (MM) filtering of the BRA MFS and CS demodulated signals in which the MM demodulator filters are mis-matched to that of the BRA and MFS filters.

7. A structure comprising:

a input port for receiving baseand signals; and

a baseband signal processing network for receiving said baseband signals and providing cross-correlated bit rate agile Peak Limited(PL) in-phase and quadrature-phase baseband signals.

8. A structure for Orthogonal Frequency Division Multiplexed (OFDM) signals comprising:

a input port for receiving OFDM baseband signals; and

a baseband signal processing network for receiving said baseband signals and providing cross-correlated filtered in-phase and quadrature-phase baseband signals.

9. A Bit Rate Agile (BRA) structure comprising:

a input port for receiving single or plurality of baseband binary input signals;

a baseband signal processing network for receiving said baseband binary signals and providing combined Time Constrained Signal(TCS) response and Long Response (LR) filtered multi-level in-phase and quadrature-phase baseband signals; and

a Quadrature Modulator serving to quadrature modulate said Time Constrained Signal (TCS) response and Long Response (LR) filtered in-phase and quadrature-phase baseband signals;

a transmit amplifier to provide said quadrature modulated signal to the transmission medium;

an interface receiver port to provide connection of the said filtered quadrature modulated signal to the demodulator; and

a demodulator structure to serve for signal demodulation.