Transinformation of a Binary Underwater Acoustic Communication Channel Reflected from a Random Surface

摘要

This report is concerned with an investigation of information capability of a binary coded, amplitude modulated, narrow-beam acoustic signal reflected from a wind driven surface. Experimental work is conducted in a model tank. The transinformation is measured as a function of modulation index for an input consisting of a random, non-return-to-zero binary pulse train using a simple synchronous detector at the output. Various systems are utilized to generate, reconstruct, and process the signal. The results show that the transinformation is related to the modulation index and the sea state. Also, it is demonstrated that the use of more sophisticated detectors can increase the transinformation under certain circumstances. (Author)