Design for underwater code division multiple access transceiver

Code division multiple access (CDMA) is one of the promising medium access control (MAC) schemes for underwater acoustic sensor networks because of its robustness against frequency-selective fading and high frequency-reuse efficiency. In this study, we design the forward and reverse links of a CDMA transceiver so that it can be operated in underwater acoustic channel environments, and we evaluate its performance by computer simulations. A pseudorandom noise code acquisition process is added for phase-error correction before decoding the user data by means of a Walsh code in the receiver.