Patent ID: 7126981
Filing Date: 2006-10-24
Classification: H04B

Abstract:
1. A cell search method for a CDMA system for a three-stage cell search procedure, comprising the steps of: matching incoming signals; over-sampling the incoming signals N times against a chip rate; down-sampling the incoming signals and outputting N over-samples (Y choosing randomly a sample of the N over-samples; transmitting the sample chosen randomly from the N over-samples into a first stage process, a second stage process and a third stage process to accomplish a trial; achieving a slot synchronization of the incoming signal in the first stage process; achieving a code group and frame synchronization of the incoming signal in the second stage process; selecting a scrambling code of the incoming signal in the third stage process; and testing the scrambling code against a threshold η wherein if the threshold is not exceeded, then the trial is considered to be failure and a new trial will be restarted without penalty; or the selected scrambling code goes for a second verification unit; wherein if the scrambling code passes the second verification, then the trial succeeds, otherwise the a new trial will be restarted with a penalty time T