Abstract
To analyze the impact of source beam divergence angle on the performance of underwater wireless optical code division multiple access system, an analytical approach is employed. In this paper, the system bit error rate (BER) performance is the primary concern of the analysis. As the user address sequence optical orthogonal codes are used. LED is used as the optical source having the wavelength of 532nm and Si avalanche photodiode is used as the optical detector. The BER performance is analyzed with respect to different system parameters for different water types (i.e., pure sea water, clear ocean water, and coastal ocean water). For each water type, this analysis indicates that the BER performance is better for narrower beam divergence angle. However, the mobility of the target receiver and the user coverage area becomes limited as a consequence.
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