Patent ID: 6301288
Filing Date: 2001-10-09
Classification: H04B,H04J,H04L

Abstract:
An improved method for transmitting a number M of data bits from a transmitter to a receiver, the method being of the type in which a plurality of chip frames are formed by multiplying each of the data bits by N of the chips of a pseudorandom binary interleaving code sequence, thereby producing a set of N product chips corresponding to each bit, and interleaving the product chips so that each chip frame includes a unique one of the product chips from each bit, the improvement comprising the steps of:(a) selecting an integer Q;(b) selecting N to be one less than a power of two;(c) selecting M to be equal to an integer selected from the group of integers consisting of QN+1, QN-1 and QN+S, wherein S is an integer greater than 1, less than N and lacking a common factor with N;(d) providing, at the transmitter and at the receiver, the pseudorandom binary interleaving code sequence, of N chips, selected from the group of sequences consisting of self-orthogonal sequences and approximately self-orthogonal sequences; and(e) sequentially multiplying, at the transmitter, each of the M data bits by each of the N chips of the pseudorandom binary interleaving code sequence, thereby producing a packet of N chip frames, said packet including NM product chips.