[특허]Methods and systems for transmission of multiple modulated signals over wireless networks

Wi LAN, Inc.

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특허 상세정보

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Methods and systems for transmission of multiple modulated signals over wireless networks

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04L-001/02 H04L-027/28 H04L-027/26
미국특허분류(USC)	375/267; 375/260
출원번호	UP-0125741 (2008-05-22)
등록번호	US-7555054 (2009-07-09)
발명자 / 주소	Feher, Kamilo
출원인 / 주소	Wi LAN, Inc.
대리인 / 주소	Procopio, Cory Hargreaves & Savitch LLP
인용정보	피인용 횟수 : 48 인용 특허 : 187

초록
▼

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.

대표
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The invention claimed is: 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.

이 특허에 인용된 특허 (187)

이 특허를 인용한 특허 피인용횟수: 48

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Methods and systems for transmission of multiple modulated signals over wireless networks

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이 특허에 인용된 특허 (187)

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Methods and systems for transmission of multiple modulated signals over wireless networks

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이 특허에 인용된 특허 (187)

이 특허를 인용한 특허 피인용횟수: 48

IPC 상위 출원인

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IPC 상세정보(version : 201201)

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