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VoIP multimode WLAN, Wi-Fi, GSM, EDGE, TDMA, spread spectrum, CDMA systems

  • US 20090310591A1
  • Filed: 10/25/2007
  • Published: 12/17/2009
  • Est. Priority Date: 08/03/2005
  • Status: Active Grant
First Claim
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1. A system comprising:

  • a first processor for processing a voice over Internet Protocol (VoIP) voice signal and for processing said voice signal into a first bit rate processed Orthogonal Frequency Division Multiplexed (OFDM) or Orthogonal Frequency Division Multiple Access (OFDMA) signal;

    a second processor and transmit filter for processing and filtering a signal and for providing a second bit rate processed and filtered Time Division Multiple Access (TDMA) signal, wherein said first bit rate has a different rate than said second bit rate;

    a selector or combiner for selecting or combining the first or second rate signal;

    a modulator and a transmitter for modulation and transmission of the selected or combined signal; and

    a receiver for receiving said selected or combined transmitted signal, comprising two antennas for receiving transmitted signal, a demodulator, receiver filter and receiver processor for demodulation, filtering and processing of received TDMA signal wherein the receive filter for filtering of the TDMA signal is mis-matched to the transmit filter for filtering of the first bit rate TDMA signal and receive processor for processing provides processed received baseband mis-match filtered cross-correlated in-phase and quadrature-phase TDMA signal.

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