Patent ID: 6985509

Claim:
A method for generating a modulation sequence from a data value in a direct sequence spread spectrum transmitter, said method comprising: generating a first and second code sequences by interleaving groups of M chips from a pseudo-noise sequence C=(C 1 , C 2 , C 3 , . . . , C N ) of length N with elements C i =±1, said first code sequence C a being C a (2 jM+i )= C ( jM+i ) C a ((2 j +1) M+i )= C ( jM+i ) and said second code sequence C b being C b (2 jM+i )= C ( jM+i ) C b ((2 j +1) M+i )=− C ( jM+i ) wherein j=0, . . . , N/M−1 and i=1, . . . , M, and M and N are integers; and selecting said modulation sequence as said first or second sequence according to the data value.