Patent ID: 6256337
Filing Date: 2001-07-03
Classification: H04L

Abstract:
A method for synchronizing a receiver pseudo noise (PN) sequence of a direct sequence spread spectrum communication receiver with a received PN sequence in a received signal, wherein the received signal is a time-division duplexing (TDD) signal or a time-division multiple-access (TDMA) signal, wherein the received PN sequence has a received PN phase, and wherein the receiver PN sequence has a receiver PN phase, the method comprising:performing an acquisition of the receiver PN phase, wherein said performing an acquisition comprises:determining an initial value of the received PN phase, wherein said determining an initial value uses a maximal-likelihood (ML) detection, wherein a sequence of correlation measurements in the ML detection is repeated so that at least one complete sequence of correlation measurements is made during a time when the received signal is active; andsetting the receiver PN phase equal to the initial value of the received PN phase.