Patent ID: 7436963
Filing Date: 2008-10-14
Classification: H04J

Abstract:
1. A process for generating scrambling codes for CDMA communications, the scrambling codes having an I branch and a Q branch, the process comprising: generating, using first and second linear-feedback-shift-registers, a first m-sequence and a second m-sequence, then modulo-2 adding the first m-sequence and the second m-sequence to form the I branch of the scrambling codes; generating a first masking word and a second masking word corresponding to respective polynomial time shifts; and modulo-2 adding intermediate taps of the first and second linear-feedback-shift-registers chosen using the first and second masking words so as to generate a third sequence and a fourth sequence, then modulo-2 adding the third sequence and fourth sequence to form the Q branch of the scrambling codes, with the Q branch being obtained by translating the I branch by τ=2