Patent ID: 6993065

Claim:
A multi-channel spread-spectrum modulator subsystem, comprising: a demultiplexer for demultiplexing a representation of an input data stream into first and second sub-channel data-sequence signals; a first mapping circuit coupled to receive the first sub-channel data-sequence signal, responsive to each segment of the first sub-channel data-sequence for selecting a spreading-code for the first sub-channel from among a plurality of spreading-codes based on a first set of bits of the segment of the first sub-channel data-sequence, and for setting a phase for the selected spreading-code for the first sub-channel to a phase selected from among a plurality of phases based on a second set of bits of the segment of the first sub-channel data-sequence, to produce a first spread-spectrum sub-channel signal; a second mapping circuit coupled to receive the second sub-channel data-sequence signal, responsive to each segment of the second sub-channel data-sequence signal for selecting a spreading-code for the second sub-channel from among a plurality of spreading-codes based on a first set of bits of the segment of the second sub-channel data-sequence, and for setting a phase for the selected spreading-code for the second sub-channel to a phase selected from among a plurality of phases based on a second set of bits of the segment of the second sub-channel data-sequence, to produce a second spread-spectrum sub-channel signal; a signal combiner for receiving and combining the first and second spread-spectrum sub-channel signals for transmission.