Implementation and Design of Underwater Acoustic Speech Communication System Based on OFDM Technology

摘要

Due to severe signal degradation caused by multipath propagation and the limited bandwidth and the time-varying and space-variant nature of the underwater acoustic channel, underwater acoustic communication is difficult. A suitable for underwater acoustic channel communication mode must be employed. Implementation and design of the real-time speech communication system based on orthogonal frequency division multiplexing (OFDM) technology, AMBE-2000 was used to compress the speech coding. The main hardware circuit and software design of speech communication system were analyzed, speech signal was inset comfortable noise, eliminated echo, controlled volume, finally through the system debugging and channel pool test. It proved that the underwater acoustic speech communication system was feasible, speech was clear.