Patent ID: 7336699
Filing Date: 2008-02-26
Classification: H04B

Abstract:
1. In a communications system, a method of determining whether a chipping code from a group of codes is used in a signal, the method comprising steps of: a) receiving a signal which uses a chipping code; b) calculating, for each respective code in the group of codes, a correlation value of the received signal and the respective code; c) comparing, responsive to the step b) of calculating, a highest correlation value and a next highest correlation value; d) determining if the comparison of step c) exceeds a first threshold; e) comparing the highest correlation value and a total received power of the signal; f) determining if the comparison of step e) exceeds a second threshold; and g) selecting the code with the highest correlation value as the correct code if the determination in d) exceeds the first threshold and the determination in f) exceeds the second threshold.