Performance of noncoherent direct-sequence spread-spectrum multiple-access communications
Abstract
The performance of noncoherent reception in direct-sequence spread-spectrum multiple-access communications systems is investigated for additive white Gaussian noise channels. Analytical and numerical results on the probability of error are presented for binary and M-ary frequency-shift-keying data modulation with noncoherent demodulation and differential-phase-shift-keying data modulation with differentially-coherent demodulation. Both synchronous and asynchronous systems are analyzed. Systems which employ deterministic as well as random signature sequences are considered. The multiple access capability of noncoherent DS/SS systems is evaluated and compared to that of coherent DS/SS systems with the same parameters. The comparison shows that the loss in the performance of DS/SSMA systems due to noncoherent reception can be considerably larger than the loss incurred to noncoherent single-user systems operating in additive Gaussian noise.
- Publication:
-
IEEE Journal on Selected Areas in Communications
- Pub Date:
- September 1985
- Bibcode:
- 1985IJSAC...3..687G
- Keywords:
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- Multiple Access;
- Random Noise;
- Spread Spectrum Transmission;
- White Noise;
- Error Signals;
- Frequency Shift Keying;
- Phase Shift Keying;
- Probability Distribution Functions;
- Communications and Radar