Adaptive equalization algorithms for high rate underwater acoustic communications

Abstract

This paper is concerned with the design of high data rate acoustic communication systems that employ adaptive equalization to overcome the effects of intersymbol interference and fading. Our treatment is focused on the use of nonlinear decision-feedback equalization that is appropriate for high-speed, phase coherent digital communications on long range, deep water horizontal paths and medium range shallow water paths. The performance characteristics, limitations, and implementation complexities of adaptive equalization algorithms are also considered.