×

CDMA communication system and method

  • US 6,597,676 B1
  • Filed: 04/18/2000
  • Issued: 07/22/2003
  • Est. Priority Date: 07/09/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. A communication method in a spread spectrum communication system for performing communication between a base station and terminal stations, comprising the steps of:

  • transmitting, in each terminal station, a first signal spread with a spreading code generated by a spreading code generator;

    performing, in the base station, a timing acquisition of the first signal from each terminal station and transmitting first difference information which indicates a phase difference between the first signal and a reference phase used in the timing acquisition;

    setting, in each terminal station, the phase of the spreading code generated by the spreading code generator in accordance with the first difference information and transmitting a second signal spread with the spreading code having the set phase;

    performing, in the base station, a tracking of the second signal from each terminal station and transmitting second difference information between the second signal and the reference phase;

    setting, in each terminal station, a delay amount of a delay circuit in accordance with the second difference information, wherein the delay circuit is between an antenna of each terminal station and the spreading code generator.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×