×

CDMA communication system and method

  • US 7,545,777 B2
  • Filed: 06/09/2003
  • Issued: 06/09/2009
  • Est. Priority Date: 07/09/1996
  • Status: Expired due to Fees
First Claim
Patent Images

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

  • transmitting, from each terminal station, a first signal;

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

    generating, in each terminal station, an orthogonal signal having a phase set in accordance with the first difference information and transmitting a second signal using the generated orthogonal signal;

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

    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 a generator means for generating the orthogonal signal,wherein the first difference information is input to the generator means and the second difference information is input to the delay circuit.

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