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CDMA receiver

  • US 7,327,775 B1
  • Filed: 12/23/1999
  • Issued: 02/05/2008
  • Est. Priority Date: 12/23/1999
  • Status: Expired due to Fees
First Claim
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1. A method comprising:

  • receiving an RF signal, said received RF signal comprising a plurality of information channel signals each comprising different code division multiple access data spread using a different spreading code, wherein each of said plurality of information channel signals are transmitted in one of a plurality of transmission bands, and each of said plurality of information channel signals is carried on one of a plurality of carrier frequencies;

    down-converting said received RF signal by a single down-converter to form an intermediate signal, wherein said single down-converter is arranged to receive said received RF signal and simultaneously multiply said RF signal by a plurality of oscillator signals when operating in a first mode and multiply said RF signal by a single oscillator signal when operating in a second mode, wherein said intermediate signal comprises down-converted versions formed by the single down-converter of each of said plurality of information channel signals, and said down-converted versions of each of said plurality of information channel signals are generated from a plurality of frequencies, said down-converted versions of each of said plurality of information channel signals are within a common frequency spectrum;

    processing the intermediate signal in a baseband stage to generate a baseband signal; and

    decoding said baseband signal to extract data from said down-converted versions of each of said plurality of information channel signals.

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