Patent ID: 6069915
Filing Date: 2000-05-30
Classification: H04B

Abstract:
A method for synchronizing an n-chip spreading code of a received spread spectrum radio signal to a local reference code, the method comprising the steps of:(i) correlating said n-chip local reference code with n corresponding samples of said received signal, said samples being taken at sampling intervals determined by a chip rate of said received signal and a chip timing position;(ii) comparing a result of said correlation performed in step (i) with a pre-determined correlation threshold, and providing an output signal indicative of said comparison;(iii) temporally displacing said n-samples of said received signal by a period representative of one chip period if said threshold has not been exceeded;(iv) introducing a random time offset into said chip timing position; and(v) repeating steps (i) to (iv) for each of n-1 possible chip displacements of said received signal with respect to said local reference code until said threshold has been exceeded.