Cross-correlated TDMA, spread spectrum, CDMA and OFDM systems

• US 7,558,313 B2
• Filed: 10/11/2007
• Issued: 07/07/2009
• 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:
  US11/871,076
• Publication Number:
  US 20080031310A1
• Time in Patent Office: 635 Days
• Field of Search: 375/232, 375/295, 375/297, 375/146, 455/114.3, 455/127.3, 455/253.2
• US Class Current: 375/146
• 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

Cross-Correlated Time Division Multiple Access (TDMA), Spread Spectrum, Code Division Multiple Access (CDMA) and Orthogonal Frequency Division Multiplexed (OFDM) modulated OFDM receiver and demodulator systems. Receiver for receiving a Time Division Multiple Access (TDMA) modulated signal having a first modulation format and a second modulated signal having a second modulation format and demodulator, filter and processor for demodulating, filtering and processing the received TDMA modulated signal and for filtered, processed cross-correlated in-phase and quadrature-phase baseband signals and demodulating the second modulated signal providing a demodulated baseband signal. A demodulator system containing two demodulators for demodulating the received signal. Receiver for receiving a Time Division Multiple Access (TDMA) and a Orthogonal Frequency Division Multiplexed (OFDM) modulated signal. A demodulator, filter and processor for demodulating, filtering and processing the received TDMA modulated signal and for providing demodulated filtered, processed TDMA cross-correlated in-phase and quadrature-phase baseband signals and demodulating the spread spectrum modulated signal and providing a demodulated filtered spread spectrum signal.

Claims

1. A receiver and demodulation system comprising:

a receiver system for receiving a Time Division Multiple Access (TDMA) or a Orthogonal Frequency Division Multiplexed (OFDM) modulated signal for providing received modulated TDMA or OFDM signal to a demodulator system for demodulation and processing of received TDMA or OFDM modulated signal; and

a demodulator system, a filter and a processor for demodulating, filtering and processing said received TDMA modulated signal or said OFDM modulated signal for providing demodulated filtered, processed TDMA or OFDM signal to a selector for selecting processed TDMA or OFDM signal, wherein said receiver system comprises a diversity receiver for diversity reception and said demodulator system and processor comprises a pseudo-error and diversity control processor and said demodulated filtered, processed TDMA signal comprises cross-correlated in-phase and quadrature-phase baseband receive filtered signals.