Cross-Correlated Quadrature Modulated Spread Spectrum, OFDM and Position Finder System

• US 20090098852A1
• Filed: 12/14/2008
• Published: 04/16/2009
• Est. Priority Date: 08/03/2005
• Status: Active Grant

• Current Assignee: Kamilo Feher
• Original Assignee: Kamilo Feher
• Inventors: Feher, Kamilo
• Granted Patent: US 7,899,491 B2
• Time in Patent Office: Days
• US Class Current: 455/404.2
• CPC Class Codes: H04M 2207/20 hybrid systems
• CPC Class Codes: H04M 2242/04 for emergency applications
• CPC Class Codes: H04M 2242/30 Determination of the location of a subscriber
• CPC Class Codes: H04M 3/382 using authorisation codes or passwords
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

A position finder and communication system processes signals received from multiple satellite and land based locations and generates processed position finder signal. A first cross-correlator and a transmit baseband filter generates cross-correlated in-phase and quadrature-phase processed filtered baseband signals from an input signal and a second cross-correlator generates cross-correlated in-phase and quadrature-phase processed spread spectrum signals. A processor processes data, voice or video signal into Orthogonal Frequency Division Multiplexed (OFDM) or into Orthogonal Frequency Division Multiple Access (OFDMA) processed data, voice or video signal. The processed position finder signal is further processed jointly with one or more of the signals generated by the first or second processed cross-correlated signal or with the processed OFDM or OFDMA signal and the jointly processed signal is provided to a quadrature modulator for quadrature modulation and transmission of the quadrature modulated signal. The transmitter for transmission of the quadrature modulated signal includes a first amplifier operated in a first radio frequency (RF) band in a linearly amplified (LINA) mode and a second amplifier operated in a second radio frequency (RF) band operated in a non-linearly amplified (NLA) mode. The cross-correlated in-phase and quadrature-phase processed filtered baseband signals and cross-correlated in-phase and quadrature-phase processed spread spectrum signals are used in a cellular communication system and the OFDM or OFDMA signal is used in a wireless local area network, wherein the cellular communication system and wireless local area network are distinct communication systems and networks.

Claims

1. A position finder and communication system comprising:

a first processor for receiving and processing multiple signals received from multiple locations and for generating from said received signals a processed position finder signal;

a second processor, comprising a first cross-correlator and a transmit baseband filter, for generating cross-correlated in-phase and quadrature-phase processed filtered baseband signals from an input signal;

a third processor, comprising a spread spectrum processor and a second cross-correlator, for generating cross-correlated in-phase and quadrature-phase processed spread spectrum signals;

a fourth processor comprising an orthogonal frequency division processor for generating a orthogonal frequency division processed signal;

a fifth processor for generating a signal from a processing of the processed position finder signal generated by the first processor, with one or more of the signals generated by the second, third and fourth processors;

a quadrature modulator for quadrature modulation of the signal generated by the fifth processor; and

a transmitter for transmission of the quadrature modulated signal.

2. The system of claim 1, further comprising a receiver and demodulator for receiving and demodulating a modulated signal.

3. The system of claim 1, wherein said multiple signals received are received from two or more satellite transmitters and from two or more land based transmitters, wherein said received signals from satellite transmitters are received in different radio frequency bands than said signals received from land based transmitters.

4. The system of claim 1, wherein said spread spectrum processor and second cross-correlator comprise a code division multiple access processor and filter for providing code division multiple access cross-correlated in-phase and quadrature-phase filtered signals having a different modulation format and different bit rate than the modulation format and the bit rate of said second processor generated cross-correlated in-phase and quadrature-phase processed filtered baseband signals.

5. The system of claim 1, wherein said orthogonal frequency division processed signal is an Orthogonal Frequency Division Multiplexed or Orthogonal Frequency Division Multiple Access processed voice or video signal.

6. The system of claim 1, wherein said transmitter for transmission of the quadrature modulated signal comprises a first amplifier operated in a first radio frequency (RF) band in a linearly amplified (LINA) mode and a second amplifier operated in a second radio frequency (RF) band, wherein the second RF band is different from the first RF band and said second amplifier is operated in a non-linearly amplified (NLA) mode.

7. The system of claim 1, wherein said cross-correlated in-phase and quadrature-phase processed filtered baseband signals and said cross-correlated in-phase and quadrature-phase processed spread spectrum signals are used in a cellular communication system and said orthogonal frequency division processed signal is used in a wireless local area network, wherein said cellular communication system and said wireless local area network are distinct communication systems and networks.

8. The system of claim 1, wherein said first cross-correlator generates cross-correlated in-phase and quadrature-phase processed baseband signals such that when the in-phase signal has its maximum amplitude, the quadrature-phase signal has zero value and when the in-phase signal has a local maximum the quadrature-phase signal has a local minimum.

9. The system of claim 1, wherein said orthogonal frequency division processor for providing a orthogonal frequency division processed signal comprises a wired multimode communication connector for receiving a processed video signal from a wire, cable, or fiber optic communication connected internet system.

10. The system of claim 1, further comprising a receiver and demodulator for receiving and demodulating a modulated signal, wherein said receiver and demodulator comprises an antenna array of four or more antennas for receiving said modulated signal and a receive baseband filter for receiving and filtering the demodulated signal and for providing cross-correlated in-phase and quadrature-phase filtered baseband signals wherein said receive baseband filter is mismatched to said transmit baseband filter.