Patent ID: 8565288
Filing Date: 2013-10-22
Classification: H04B

Abstract:
1. An apparatus for performing delay locked looping upon a received signal which is a spread spectrum code signal, comprising: a spread spectrum code generating circuit, for generating a plurality of replica spread spectrum signals in view of an estimated code phase delay and phase spacing, wherein the replica spread spectrum code signals have phases respectively different from the phase of the received signal; a calculating circuit, coupled to the spread spectrum code generating circuit, for receiving the replica spread spectrum code signals and the received signal, and calculating a spread spectrum code error statistics signal in view of the replica spread spectrum code signals and the received signal; and an adjusting circuit, coupled to the calculating circuit and the spread spectrum code generating circuit, for adjusting the estimated code phase delay according to the spread spectrum code error statistics signal and a plurality of phase differences between a plurality of sampled points of at least one replica spread spectrum code signal and a plurality of corresponding signal transition points.