Error and throughput performance of multidecoded erasure-based direct sequence/time hopping selection diversity multiaccess systems

A new direct-sequence/time-hopping spread-spectrum system is intended to increase the multiaccess efficiency by employing time diversity and a multidecoding-erasure-error forward error correction scheme. Reed-Solomon is the basic code employed, and an algorithmic demodulation rule is used in conjunction with a modified majority vote among the outputs of many decoders finally to yield a superior error and throughput performance. It is also shown that the extra side information represented by the direct sequence preamplifier acquisition matched-filter output can be used to adjust the thresholds on the demodulation erasure generation process to reflect the instantaneous condition of multiaccess interference