摘要
由声波传播的多途效应所引起的码间干扰及信号衰落,使得水下数据传输的速率和可靠性都大大降低。针对多途干扰严重的水声信道,将一种基于最小均方误差算法的信道自适应均衡器应用于水声信号处理中。对该均衡器的基本理论及其结构进行了归纳,结合水声多途信道的基本特点,建立了仿真模型,重点分析了步长参数、信噪比等对算法收敛速度和稳态误差等方面性能的影响,为实现高质量的水下信息传递提供技术支持。
The ISI and signal attenuation caused by rnultipath effect could make underwater data transmission more difficult. A aiming at the underwater acoustic channel with serious interference by multipath, an adaptive channel equalization method based on the least mean square error algorithm is applied in the underwater acoustic signal processing. The basic theory and structure of the equalizer are summarized. The simulation model is established in combination with the basic characteristics of multipath acoustic channel. The influence of step parameters and SJN＇R on the algorithm is analyzed, thus providing a technical support to the underwater acoustic communication.
出处
《信息安全与通信保密》
2012年第5期61-62,65,共3页
Information Security and Communications Privacy
关键词
水声信道
自适应
均衡
最小均方误差
underwater acoustic channel
adaptive
equalization
LMS
