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CDMA COMMUNICATION SYSTEM AND METHOD

  • US 20090245210A1
  • Filed: 06/08/2009
  • Published: 10/01/2009
  • Est. Priority Date: 07/09/1996
  • Status: Active Grant
First Claim
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1. A base station for communicating with a plurality of terminal stations, comprising:

  • an antenna for receiving uplink signals from said plurality of terminal stations and transmitting downlink signals to said plurality of terminal stations;

    a modulator-demodulator for despreading signals received from said plurality of terminal stations, and for spreading signals to be transmitted to said plurality of terminal stations; and

    a phase synchronization controller for generating a phase control signal for controlling a phase of an uplink signal transmitted from one of said plurality of terminal stations,wherein said modulator-demodulator detects a phase difference between a phase of a spreading code of a signal received from said terminal station and a reference phase, andsaid phase synchronization controller generates, in an acquisition searching mode, a first phase control signal, and, in a phase tracking control mode, a second phase control signal, based on said detected phase difference.

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