Performance Analysis of Underwater Wireless Optical CDMA System

In this paper, the study on the bit error rate performance of underwater wireless optical code division multiple access (UWOCDMA) system is presented with analytical approach. Optical orthogonal codes are used for the decoding purpose in the optical correlator receiver. LED with an operating wavelength of $532\mathrm{n}\mathrm{m}$ is used as the optical source and Silicon APD is used as the optical detector. The BER performance of this system is analyzed with respect to different system parameters. It is found that the system BER performance significantly depends on underwater channel qualities i.e., water types and other system parameters. However, the overall system BER performance achieved in pure sea water is the best among all the water types.