Patent ID: 6324205
Filing Date: 2001-11-27
Classification: H04B,H04J

Abstract:
A method for generating a KX long code sequence for use in a CDMA communication system, where K is an integer multiple of 3, the method comprising:(i) generating a preferred pair of sequences b(d) and b'(D) each being of length N and each being a 1X long code sequence; wherein N=2.sup.n -1(ii) forming sequence [b(d)+b'(D)] by modulo 2 adding sequences b(d) and b'(D);(iii) delaying the sequence b'(D) by a predefined amount (K-3) times to thereby form (K-3) delayed sequences of sequence b'(D);(iv) modulo 2 adding the sequence b(d) to each of the (K-3) delayed sequences formed in step (iii)(v) generating a KX clock signal whose frequency is K times that of a clock signal used to generate the 1X sequences b(d) and b'(d); and(vi) recurrently for each K transitions of the KX clock setting a bit of the KX sequence to an associated one of the bits respectively of sequences b(D)--and [b(D)+b'(d)] and b'(D) and the (K-3) sequences formed in step (iv) sequentially.