Abstract :
A performance analysis of direct-sequence systems with long pseudonoise sequences is presented. The assessment of the symbol error probability in the presence of multiple-access interference is stressed, but other types of interference are also considered for completeness. Both binary and quaternary spreading waveforms are treated. The analysis, which uses a nonstandard Gaussian approximation, makes transparent the answers to a number of technical issues. Approximate error probabilities that are relatively simple computationally are derived. The approximations are accurate to within at least one decibel and, more typically, a few tenths of a decibel
Keywords :
binary sequences; decoding; error statistics; multi-access systems; radiofrequency interference; spread spectrum communication; approximate error probabilities; binary spreading waveforms; direct-sequence systems; long pseudonoise sequences; multiple-access interference; nonstandard Gaussian approximation; quaternary spreading waveforms; spread spectrum communication; symbol error probability; Binary sequences; Data security; Error probability; Gaussian approximation; Gaussian noise; Multiple access interference; Performance analysis; Phase shift keying; Random sequences; Signal analysis;
