Methods and systems for transmission of multiple modulated signals over wireless networks
View Patent ↗Receiver network for receiving a first filtered modulated transmitted signal in a first RF band and a second modulated transmitted signal in a second RF band and for providing received signals to one or more demodulators. A demodulator and baseband filter for demodulating and filtering the first filtered modulated received signal and for providing filtered demodulated baseband signal by a baseband filter mis-matched to the filter of the first filtered modulated transmitted signal and demodulating the second modulated signal providing a demodulated baseband signal and a selector for selecting either the first or the second demodulated baseband signal. A receiver and demodulation system receiving a first TDMA modulated signal having a first bit rate and for receiving a second modulated signal having a second bit rate and for providing the received signals to a one or more demodulators and for providing cross-correlated demodulated in-phase and quadrature-phase baseband signals and demodulating the second bit rate modulated signal and providing a demodulated baseband signal.
1. A transmitter system comprising:
a first signal processor for receiving a digital binary input signal and formatting said input signal into at least two baseband signal, each including an I and a Q component;
a pair of pass-band filters for each said baseband signal for filtering said I and Q components in a respective frequency band;
a second signal processor for further processing and shaping said I and Q components;
at least two quadrature modulators for modulating said I and Q components to provide a first and a second quadrature modulated RF signal;
at least two power amplifiers for amplifying said quadrature modulated RF signals to provide amplified RF signals; and
an antenna array with at least two antenna elements for transmitting said respective amplified RF signals,
wherein said first signal processor comprises a cross-correlator for providing a selectable amount of cross-correlation between said I and Q components of any of said baseband signals.
2. A system as in claim 1 , wherein said first signal processor is a time constrained signal processor for processing and formatting said I and Q components.
3. A system as in claim 1 , wherein said first signal processor is a long response signal processor for processing and formatting said I and Q components.
4. A system as claimed in claim 1 , wherein said filters are re-configurable for filtering signals of various bit rates.
5. A system as claimed in claim 1 , wherein said second signal processor is further adapted to convert said baseband signals from the time domain into the frequency domain.
6. A system as claimed in claim 1 , wherein said second signal processor is adapted to limit the amplitude of said I and Q components.
7. A system as claimed in claim 1 , wherein said baseband signals are OFDM signals.
8. A system as claimed in claim 1 , wherein said baseband signals are CDMA signals.
9. A system as claimed in claim 1 , wherein said baseband signals have different data rates.
10. A transmitter system comprising:
a first signal processor for receiving an input signal and formatting said input signal into a plurality of baseband signals;
a second signal processor for further processing and shaping said baseband signals;
a plurality of quadrature modulators, each for modulating a respective baseband signal to provide a plurality of quadrature modulated RF signals;
a plurality of power amplifiers, each for amplifying said quadrature modulated RF signals, to provide a plurality of amplified RF signals; and
an antenna array for transmitting said amplified RF signals,
wherein said baseband signals are processed as sets of I and Q components and said first signal processor comprises a cross-correlator for providing a selectable amount of cross-correlation between said I and Q components of any of said plurality of sets of I and Q components.
11. A system as claimed in claim 10 , further comprising a plurality of pass-band filters for filtering said I and Q components of said baseband signals in a respective frequency band.
12. A system as claimed in claim 11 , wherein said filters are re-configurable for filtering baseband signals of various bit rates.
13. A system as in claim 10 , wherein said first signal processor is a time constrained signal processor for processing and formatting baseband signals.
14. A system as in claim 10 , wherein said first signal processor is a long response signal processor for processing and formatting baseband signals.
15. A system as claimed in claim 10 , wherein said second signal processor is adapted to limit the amplitude of said I and Q components.
16. A system as claimed in claim 10 , wherein said baseband signals are one of a OFDM and CDMA signals.
17. A system as claimed in claim 10 , wherein said baseband signals have different data rates.
18. A transmitter system comprising:
a first signal processor for receiving a digital binary input signal and formatting said input signal into a plurality of baseband signals;
a second signal processor for further processing and shaping said baseband signals;
a plurality of modulators, each for modulating a respective baseband signal, to provide a plurality of modulated RF signals;
a plurality of amplifiers, each for amplifying a respective modulated RF signal, to provide a plurality of amplified RF signals; and
a plurality of antenna elements, each for transmitting a respective amplified RF signals,
wherein said baseband signals are processed as sets of I and Q components and said first signal processor comprises a cross-correlator for providing a selectable amount of cross-correlation between said I and Q components of any of said plurality of sets of I and Q components.
19. The system of claim 18 , wherein said second signal processor is limiting the amplitude peaks of said basebands signals.
20. The system of claim 19 , wherein the modulators are quadrature modulators.
21. The system of claim 18 , wherein the modulators are quadrature modulators.
22. The system of claim 18 , wherein said baseband signals are one of OFDM and CDMA signals.
23. The system of claim 18 , wherein said baseband signals have different data rates.
24. The system of claim 18 , wherein the antenna elements are part of an antenna array.
25. The system of claim 18 , further comprising a plurality of filters for filtering said baseband signals.