Patent ID: 6307890
Filing Date: 2001-10-23
Classification: H04L

Abstract:
A method of transmitting, comprising:adding two bits to a block from a Data Radio Channel-encoded source having 190 bits to form a 24 byte modified block;encoding the modified block using a systematic block encoder to produce parity bytes and data bytes;encoding the parity bytes using a first trellis code modulator to produce a first set of complex signals;encoding the data bytes using a second trellis code modulator to produce a second set of complex signals;modulating a first set of orthogonal signals using the first set of complex signals; andmodulating a second set of orthogonal signals using the second set of complex signals, wherein the first and second set of orthogonal signals are selected from a set of mutually orthogonal spread spectrum signals, and wherein a transmitted parity bit has a lower bit error probability than a bit error probability of a transmitted data bit.