Fiber optic communication systems using CDMA have been proposed. While coherent detection is a reasonable assumption in many RF systems, semiconductor lasers for fiber applications have been shown to suffer from more serious phase variation that precludes fully coherent detection, the focus of previous CDMA research. The authors examine the effect of phase drift on several multiuser detectors for BPSK, as well as two detectors for BFSK. They show that when the desired user's phase can be tracked, BPSK match filtering offers better bit error rates than BFSK, and the authors derive closed form solutions for the error probabilities in the limit of infinitely long spreading codes modeled as a random sequence of plus and minus ones. When there is no phase tracking, they show that the probability of error of the multiuser detectors approaches one half.
|Title of host publication
|1994 IEEE GLOBECOM - Communications
|Subtitle of host publication
|Communications Theory Mini-Conference Record
|Institute of Electrical and Electronics Engineers Inc.
|Number of pages
|Published - 1994
|3rd Communications Theory Mini-Conference, CTMC 1994, held in conjunction with IEEE GLOBECOM 1994 - San Francisco, United States
Duration: Nov 27 1994 → Dec 1 1994
|1994 IEEE GLOBECOM - Communications: Communications Theory Mini-Conference Record
|3rd Communications Theory Mini-Conference, CTMC 1994, held in conjunction with IEEE GLOBECOM 1994
|11/27/94 → 12/1/94
All Science Journal Classification (ASJC) codes
- Computer Networks and Communications
- Signal Processing