基于OFDM的中程水声通信系统分析

正交频分复用（OFDM）技术具有抗多径、频带利用充分、传输数据率高的优点，在水声通信中具有重要的发展前景。但是目前的相关研究多集中在几百米到几千米的近程水声通信，随着传输距离的增加，信道条件恶劣，多径、多普勒频移影响加剧，需要设计相适应的OFDM系统并采取有效手段改善系统性能。综合分析了10公里距离水声通信的影响因素，设计出相应的OFDM系统和合理的系统参数，并仿真了该系统对信道、多普勒影响的校正。结果表明，该系统在10公里水声通信中性能可靠，可应用于实际环境。

Analysis of an OFDM System for Middle- range UWA Communication

OFDM(Orthogonal Frequency Division Multiplexing) is a method that can combat multipaths,fully use the frequency band and has high data rate,and has a promising future in UWA communication.At the beginning,almost all the researches are about short-range communication.While longer the transmission range,worse the underwater conditions with multipaths and Doppler effects,which needs to design the system parameters and take practical methods to improve the system.In this paper,a new communication system based on OFDM is proposed,aiming at reliable 10km shallow water communication,and revisions of multipaths and Doppler effect are simulated.The simulation results show that the method is reliable in 10km UWA communication.