基于OFDM的水声通信系统设计

摘要

Orthogonal Frequency Division Multiplexing(OFDM)has good characteristic of resistance to frequency selectivity attenuation and improving bandwidth efficiency. An underwater acoustic communication system based on OFDM technology is designed,which is implemented by IFFT / FFT algorithm and use cyclic prefix of guard interval to overcome intersymbol inter-ference. Through Matlab simulation,the anti-multipath interference characteristic of the OFDM system in underwater acoustic communication is proved. The OFDM technology is favored by high speed data transmission system,and it has good application prospect in underwater communication.%正交频分复用技术（OFDM）具有抗频率选择性衰减和提高频带利用率的良好特点。设计了基于OFDM技术的水声通信系统，此系统通过IFFT/FFT算法来实现，利用保护间隔的循环前缀来克服码间干扰，并通过Matlab仿真说明OFDM系统在水声通信中有抗多径干扰性能。OFDM技术受到高速率数据传输系统的青睐，在水下通信中具有很好的应用前景。