判决反馈自适应均衡技术在水声数据传输系统中的应用

在海洋石油的开发生产中，可以用水声数据传输系统对水下生产装置和设备进行遥测遥控。影响浅海、中距离水声数据传输系统可靠性的主要因素之一，是水声信号传播中的多径效应干扰。文章针对计算机模拟实现的多径传播的水声接收信号，采用判决反馈自适应均衡(DEF)技术，消除多径效应引起的码间串扰，提高了水声数据传输系统的可靠性。文中给出了DFE的结构，采用FTF算法实现了DFE，并分析了算法实施后的抗干扰性能。计算机模拟实验表明，采用DFE后，传输系统的误码率降低了1．4倍。

Application of decision feedback equalization in underwater acoustic data transmissin

Underwater acoustic data transmission systems are used to monitor and control the sub-sea oil production units in offshore petroleum industry. An important factor affecting the reliability of medium-range and shallow-water data transmission is multi-path propagation. By computer simulation, a decision feedback equalization (DFE) algorithm is developed in this paper to process the received signal and eliminate inter-symbol interference caused by multi-path propagation, and thus reduce error probability in detection. The structure of DFE is presented, the algorithm for implementation studied, and the performance discussed. Computer simulation results show that the error probability in detection can be reduced by a factor of 1.4 after using DFE.