Performance analysis of asynchronous time-spreading phase coding and wavelength-time OCDMA systems |
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| Authors: | Xiaogang Chen Shengqin Feng Dexiu Huang |
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| Affiliation: | (1) Department of ECE, Sree Sastha Institute of Engineering and Technology, Anna University, Chennai, Tamilnadu, India;(2) Department of ECE, College of Engineering, Anna University, Chennai, 600 025, Tamilnadu, India |
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| Abstract: | We compare the theoretical bit-error-rate (BER) and throughput performance of asynchronous time-spreading (TS) phase coding
and two-dimensional (2D) wavelength-time (WT) optical code division multiple access (OCDMA) communication systems. Particular
consideration is given, however, to both beat noise (BN) and multiple access interference (MAI) effects. BER performance of
the TS OCDMA scheme is much superior to that of the WT scheme in the MAI limited case, while the WT scheme has better tolerance
to beat noise. Improvement of BER performance and throughput can be obtained by utilization of optimum threshold detection.
The two OCDMA schemes have comparable bit-error probability, and the WT scheme achieves a higher throughput for a heavy load
when the optimum threshold is employed. |
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