Spread spectrum, cross-correlated and filtered modulated systems

• US 20050185699A1
• Filed: 04/18/2005
• Published: 08/25/2005
• 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 7,110,433 B2
• Time in Patent Office: Days
• US Class Current: 375/146
• 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

Spread Spectrum baseband signals, in-phase and quadrature-phase cross-correlated baseband signals and other filtered baseband signals connected to modulators for providing modulated signals. Modulator selection for modulated signal selection or for multiple modulated signals provided to one or more antennas for signal transmission.

Claims

1. A system comprising:

a first modulator for receiving spread spectrum in-phase and quadrature-phase baseband signals and modulating the spread spectrum signals;

a second modulator for receiving cross-correlated in-phase and quadrature-phase baseband signals and modulating the cross-correlated signals; and

a connection circuit for providing either the modulated spread spectrum signal or the modulated cross-correlated signal or both the modulated spread spectrum signal and the modulated cross-correlated signals to one or more antennas for signal transmission.

2. A system comprising:

a first quadrature modulator for modulation of in-phase and quadrature-phase baseband spread spectrum signals;

a second modulator for modulation of a filtered baseband signal connected to the input baseband port of the second modulator; and

a connection circuit for providing either the spread spectrum modulated signal or the filtered modulated signal or both the modulated spread spectrum signal and the modulated filtered signals to the transmitter.

3. A system comprising:

a first modulator for modulation of a spread spectrum processed signal connected to the input baseband port of the first modulator;

a second modulator for modulation of a filtered baseband signal connected to the input baseband port of the second modulator; and

a connection circuit for providing either the spread spectrum modulated signal or the filtered modulated signal or both the modulated spread spectrum signal and the modulated filtered signals to one or more antennas for signal transmission.

4. A system comprising:

a modulator for modulation of a spread spectrum processed signal connected to an input baseband port of a modulator and for modulation of a filtered baseband signal connected to an input baseband port of said modulator; and

a connection circuit for providing either the spread spectrum modulated signal or the filtered modulated signal or both the modulated spread spectrum signal and the modulated filtered signals to the transmitter.