Spread spectrum, cross-correlated and filtered modulated systems
View Patent ↗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.
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. The system as in claim 1 wherein the spread spectrum signals are comprised of Code Division Multiple Access (CDMA) signals.
3. The system as in claim 1 wherein the spread spectrum signals are comprised of Collision Sense Multiple Access (CSMA) signals.
4. The system as in claim 1 wherein the cross-correlated signals are comprised of Gaussian filtered cross-correlated baseband signals.
5. The system as in claim 1 wherein the cross-correlated signals are comprised of baseband signals used in a GSM system.
6. A system comprising:
a first quadrature modulator for modulation of in-phase and quadrature-phase baseband spread spectrum cross-correlated signals received by the input baseband port of the first modulator;
a second modulator for modulation of a filtered baseband signal received by 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 a transmitter.
7. The system as in claim 6 wherein the spread spectrum signals are comprised of Code Division Multiple Access (CDMA) signals.
8. The system as in claim 6 wherein the spread spectrum signals are comprised of Collision Sense Multiple Access (CSMA) signals.
9. The system as in claim 6 wherein the cross-correlated signals are baseband signals in accordance with GSM system requirements.
10. The system as in claim 6 wherein the filtered baseband signal is generated by a Time Constrained Signal (TCS) waveform processor connected to a Long Response (LR) filter.
11. A system comprising:
a first modulator for modulation of spread spectrum cross-correlated in-phase and quadrature-phase baseband signals received by an input baseband port of the first modulator;
a second modulator for modulation of a spread spectrum filtered baseband signal received by an input baseband port of the second modulator; and
a connection circuit for providing either the first modulated signal or the second modulated signal or both modulated signals to a transmitter.
12. The system as in claim 11 further including one or more amplifiers for amplifying one or both modulated spread spectrum signals.
13. The system as in claim 11 further including in the first, second, or both modulation circuits one or two non-linear-amplifiers (NLA) for non-linear amplification of the filtered modulated signals.
14. The system as in claim 11 wherein the spread spectrum filtered baseband signal is generated by a Time Constrained Signal (TCS) processor connected to a Long Response (LR) filter.