Time alignment in a CDMA system

摘要

A coherent reverse channel (120) a per-chip spreading function, orthogonal spreading functions and a time alignment of all traffic channels are implemented such that the main signal of each channel arrives at a base station within a fraction of a chip of one another in accordance with the invention. With this, the orthogonality among all channels is maintained, and, when demodulated, all channels except the channel of interest provides a cross correlation of substantially zero with respect to the remaining signals.