GMSK and OFDM nonlinearly and linearly amplified cellular and wireless networks

• US 20080056399A1
• Filed: 10/31/2007
• Published: 03/06/2008
• Est. Priority Date: 08/10/1998
• Status: Active Grant

• Current Assignee: Kamilo Feher
• Original Assignee: Kamilo Feher
• Inventors: Feher, Kamilo
• Granted Patent: US 7,483,492 B2
• Time in Patent Office: Days
• US Class Current: 375/260
• 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

Processor, transmit filter and modulator for processing, filtering a signal into time division multiplexed (TDM) Gaussian filtered signal and into Orthogonal Frequency Division Multiplexed (OFDM) signal and for modulating Gaussian filtered signal into Gaussian Minimum Shift Keying (GMSK) modulated signal and processed OFDM signal into OFDM modulated signal. Processor for processing a signal into processed cross-correlated in-phase and quadrature-phase filtered signal and into cross-correlated in-phase and quadrature-phase spread spectrum signal. GMSK modulated signal provided to a cellular network and OFDM modulated signal provided to a different wireless network. A first amplifier and transmitter for nonlinearly amplifying and a second amplifier for linearly amplifying modulated signal and for providing signals to a transmitter. Receiver and demodulator system for receiving and demodulating transmitted GMSK modulated and OFDM modulated signal. Receiver and demodulator having two or more than two antennas and incorporating diversity reception. Receiver and demodulator system for receiving and demodulating transmitted GMSK modulated signal has a receive filter and receive processor for filtering, processing and providing demodulated cross-correlated in-phase and quadrature-phase filtered signal, Receive filter is mismatched to transmit filter.

Claims

1. A system comprising:

a first processor, transmit filter and first modulator for processing and filtering a signal into time division multiplexed (TDM) Gaussian filtered signal and for modulating said Gaussian signal into Gaussian Minimum Shift Keying (GMSK) modulated signal;

a second processor and second modulator for processing a signal into Orthogonal Frequency Division Multiplexed (OFDM) signal and for modulating said OFDM signal into OFDM modulated signal;

a first amplifier and first transmitter for nonlinearly amplifying and for providing amplified signal to a first transmitter for transmission of the nonlinearly amplified GMSK modulated signal;

a second amplifier and second transmitter for linearly amplifying and for providing amplified signal to a second transmitter for transmission of the linearly amplified OFDM modulated signal; and

a receiver and demodulator system for receiving and demodulating transmitted GMSK modulated and OFDM modulated signal.

4. The system of claim 1 wherein said receiver and demodulator system for receiving and demodulating transmitted GMSK modulated signal comprises a receive filter and receive processor for filtering, processing and providing demodulated cross-correlated in-phase and quadrature-phase filtered signal, wherein said receive filter is mismatched to said transmit filter.

5. The system of claim 1 wherein said time division multiplexed (TDM) Gaussian filtered signal comprises a cross-correlated in-phase and quadrature-phase filtered signal.

6. The system of claim 1 wherein said time division multiplexed (TDM) Gaussian filtered signal comprises a cross-correlated in-phase and quadrature-phase processed Time Constrained Signal (TCS) response waveform and Long Response (LR) filtered signal.

7. The system of claim 1 wherein said receiver and demodulator comprises two antennas.

8. The system of claim 1 wherein said receiver and demodulator comprises a diversity receiver.

9. The system of claim 1 wherein said first transmitter and second transmitter transmit in different radio frequency (RF) bands.

10. The system of claim 1 wherein said GMSK modulated signal is used in a cellular network and said OFDM modulated signal is used in a wireless network, wherein said cellular and said wireless networks are different networks.

2. A system comprising:

a first processor, transmit filter and first modulator for processing and filtering a signal into processed cross-correlated in-phase and quadrature-phase Gaussian filtered signal and for modulating said Gaussian filtered signal into Gaussian Minimum Shift Keying (GMSK) modulated signal;

a second processor and second modulator for processing a signal into Orthogonal Frequency Division Multiplexed (OFDM) signal and for modulating said OFDM signal into OFDM modulated signal;

a first amplifier and first transmitter for nonlinearly amplifying and for providing amplified signal to a first transmitter for transmission of the nonlinearly amplified GMSK modulated signal;

a second amplifier and second transmitter for linearly amplifying and for providing amplified signal to a second transmitter for transmission of the linearly amplified OFDM modulated signal; and

a receiver and demodulator system for receiving and demodulating transmitted GMSK modulated and OFDM modulated signal.

11. The system of claim 2 wherein said receiver and demodulator system for receiving and demodulating transmitted GMSK modulated signal comprises a receive filter and receive processor for filtering, processing and providing demodulated cross-correlated in-phase and quadrature-phase filtered signal, wherein said receive filter is mismatched to said transmit filter.

12. The system of claim 2 wherein said receiver comprises three or more than three antennas.

13. The system of claim 2 wherein said receiver comprises a diversity receiver.

14. The system of claim 2 wherein said GMSK signal is provided to a cellular network and said OFDM signal is provided to a wireless network, wherein said cellular network and said wireless network are different networks.

15. The system of claim 2 wherein said Orthogonal Frequency Division Multiplexed (OFDM) signal is a cross-correlated in-phase and quadrature-phase filtered signal.

3. A system comprising:

a first processor and first modulator for processing a signal into spread spectrum signal and for modulating said spread spectrum signal into spread spectrum modulated signal;

a second processor and second modulator for processing a signal into Orthogonal Frequency Division Multiplexed (OFDM) signal and for modulating said OFDM signal into OFDM modulated signal;

a first amplifier and first transmitter for amplifying and for providing amplified signal to a first transmitter for transmission of the amplified spread spectrum modulated signal;

a second amplifier and second transmitter amplifying and providing amplified signal to a second transmitter for transmission of the amplified OFDM modulated signal; and

a receiver and demodulator system for receiving and demodulating transmitted spread spectrum and OFDM modulated signal.

16. The system of claim 3 wherein said wherein said spread spectrum signal for modulating spread spectrum signal comprises cross-correlated in-phase and quadrature-phase filtered signal.

17. The system of claim 3 wherein said receiver and demodulator system for receiving and demodulating transmitted spread spectrum signal comprises a receive filter and receive processor for filtering, processing and providing demodulated cross-correlated in-phase and quadrature-phase filtered signal.

18. The system of claim 3 wherein said_wherein said spread spectrum signal for modulating spread spectrum signal comprises cross-correlated in-phase and quadrature-phase filtered signal and said receiver and demodulator system for receiving and demodulating transmitted spread spectrum signal comprises a receive filter and receive processor for filtering, processing and providing demodulated cross-correlated in-phase and quadrature-phase filtered signal.

19. The system of claim 3 wherein said receiver and demodulator system for receiving and demodulating transmitted spread spectrum and OFDM modulated signal comprises three or more than three antennas.

20. The system of claim 3 wherein said spread spectrum signal is a first bit rate cross-correlated in-phase and quadrature-phase filtered signal and said OFDM signal is a second bit rate cross-correlated in-phase and quadrature-phase filtered signal, wherein said first bit rate is distinct from second bit rate.