Patent ID: 6134215
Filing Date: 2000-10-17
Classification: H04J

Abstract:
A method of enabling a plurality of transmitters to share a single code division multiplexed (CDM) channel in a CDM communications system, each transmitter having a plurality of communications channels for transmitting a plurality of data signals, comprising the steps of:assigning a predefined set of orthogonal channelizing codes to the plurality of transmitters in a predetermined manner;at each transmitter:channelizing each of the plurality of data signals using one of the orthogonal channelizing codes to produce a plurality of channelized data signals;spreading the plurality of channelized data signals using at least one pseudonoise (PN) code to produce a plurality of spread data signals;summing the plurality of spread data signals prior to transmission to produce a composite signal; andfrequency precorrecting the composite signal prior to transmission such that the composite signal is frequency-aligned upon reception.