TDMA, spread spectrum RF agile filtered signal transmission

• US 20060146913A1
• Filed: 12/30/2005
• Published: 07/06/2006
• Est. Priority Date: 08/31/1998
• Status: Active Grant

• Current Assignee: Kamilo Feher
• Original Assignee: Kamilo Feher
• Inventors: Feher, Kamilo
• Granted Patent: US 7,440,488 B2
• Time in Patent Office: Days
• US Class Current: 375/130
• 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

Communication and broadcast system for Time Division Multiple Access (TDMA), spread spectrum, filtered signal and cross-correlated in-phase and quadrature-phase baseband signals for Radio Frequency (RF) tunable or RF agile transmitters. A selector and connection device provides selection and connection of one or more of the TDMA, spread spectrum, filtered or cross-correlated baseband signals and or modulated signals to a transmitter. A first baseband and or modulation circuit provides spread spectrum signal, a second baseband and or modulation circuit provides TDMA signal, a third circuit provides filtered and or cross-correlated baseband and or modulation signals to a selector for selecting either one or more modulated signals and providing the selected signals to the transmitter.

Claims

1. A system comprising:

a first baseband circuit for receiving a baseband signal and for providing a spread spectrum baseband signal;

a second baseband circuit for receiving a baseband signal and for providing a filtered baseband signal;

a third baseband circuit for receiving a baseband signal and for providing cross-correlated in-phase and quadrature-phase baseband signals;

baseband selector and connection device for selecting and connecting one or more of the spread spectrum, filtered or cross-correlated baseband signals to a transmitter; and

a transmitter for transmitting the baseband signal connected to the transmitter.

5. The method as in claim 1 wherein the filtered baseband signal is a Time Division Multiple Access (TDMA) signal.

6. The method as in claim 1 wherein the transmitter comprises a modulator for modulating the baseband signal to tunable radio frequencies.

7. The method as in claim 1 wherein the transmitter comprises a baseband circuitry, and modulator for modulating the baseband signal to an RF frequency agile RF modulated signal.

8. The method as in claim 1 wherein the spread spectrum signal is a Code Division Multiple Access (CDMA) signal.

9. The method as in claim 1 wherein the spread spectrum signal is a Collision Sense Multiple Access (CSMA) signal.

10. The method as in claim 1 wherein the cross-correlated signals are Gaussian filtered cross-correlated baseband signals.

2. A system comprising:

a first modulation circuit for receiving a spread spectrum baseband signal and for providing a first modulated signal;

a second modulation circuit for receiving a Time Division Multiple Access (TDMA) baseband signal and for providing a second modulated signal; and

a circuit connecting of either the first or the second modulated signal or both the first and second modulated signals to the transmitter.

11. The method as in claim 2 wherein the transmitter comprises a tunable radio frequency (RF) transmitter.

12. The method as in claim 2 wherein the transmitter is a radio frequency (RF) agile transmitter.

3. A system comprising:

a first modulation circuit for receiving a baseband signal and for providing a filtered first modulated signal;

a second modulation circuit for receiving a Time Division Multiple Access (TDMA) baseband signal and for providing a second modulated signal; and

a circuit connecting of either the first or the second modulated signal or both the first and second modulated signals to the transmitter.

13. The method as in claim 3 wherein the transmitter is a radio frequency (RF) agile transmitter.

14. The method as in claim 3 wherein the filtered modulated signal comprises a Time Constrained Signal (TCS) processor for processing baseband waveforms, a Long Response (LR) filter for filtering the processed waveforms and providing processed and filtered first modulated signal.

15. The method as in claim 3 wherein the filtered baseband signal is a Gaussian filtered baseband signal.

16. The method as in claim 3 wherein the filtered baseband signal is generated by a Time Constrained Signal (TCS) processor processed waveform connected to a Long Response (LR) filter.

17. The method as in claim 3 wherein the filtered baseband signal is generated by a Time Constrained Signal (TCS) processor processed waveform connected to a Long Response (LR) filter and a signal peak limiting device which limits the peaks of the filtered baseband signal.

4. A system comprising:

a first modulation circuit for receiving spread spectrum baseband signals and for providing a first modulated signal;

a second modulation circuit for receiving Time Division Multiple Access (TDMA) baseband signals and for providing a second modulated signal;

a third modulation circuit for receiving filtered baseband signals and for providing a third modulated signal;

a selector for selecting either one or more modulated signals and providing the selected signals to the transmitter.

18. The method as in claim 4 wherein the transmitter is a radio frequency (RF) agile transmitter.

19. The method as in claim 4 further including in the third modulation circuit or in the transmitter a non-linear amplifier for non-linearly amplified signal amplification of the filtered modulated signal.

20. The method as in claim 4 wherein the filtered baseband signal is a Gaussian filtered baseband signal.