Design and Analysis of Low Frequency Transmitter and Receiver for an Insecure Shallow Water Acoustic Channel of the Persian Gulf
Underwater acoustic communications presents unique challenges that are being overcome with advances in signal processing algorithms and related hardware technologies. The accurate simulation and performance comparison of various algorithms is essential for building an optimized and robust communications system. This paper describes part of a project designed, based on the results obtained from practical measurements in The Persian Gulf, to examine an underwater acoustic communication system in The Persian Gulf. Transmitted data are acoustic signals to which for more safety in transmission and low frequency bandwidth, a cryptography algorithm and speech coding are applied. In transmitter, Quadrature Phase Shift Keying (QPSK) signaling is employed to make efficient use of the available channel bandwidth.