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Multi-carrier CDMA communications systems

  • US 6,097,712 A
  • Filed: 06/20/1997
  • Issued: 08/01/2000
  • Est. Priority Date: 06/20/1997
  • Status: Expired due to Term
First Claim
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1. A method of combining signals in a receiver of a CDMA (code division multiple access) communications system in which signals for each of a plurality of carriers of the system are combined, comprising the steps of:

  • combining signals representing data received for the plurality of carriers to produce a combined data signal;

    combining signals representing a reference signal received for the plurality of carriers to produce a composite reference signal representing characteristics of the plurality of carriers; and

    deriving a received data signal from the combined data signal and the composite reference signal;

    wherein the steps of combining signals representing data and combining signals representing a reference signal for the plurality of carriers are carried out commonly before subsequent steps of despreading using a common code for the plurality of carriers and separating the data and reference signals using respective orthogonal code sequences.

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