空时联合均衡水声数据检测仿真研究

Simulations on Diversity Combining for Underwater Acoustic Data Detection

水声信道的衰落特性对单传感器数据检测性能影响较大。本文采用空间分集技术,结合判决反馈均衡器,即进行空时联合均衡,实现了水声多径衰落信道的数据检测仿真,分析了检测性能,并给出了均衡算法参数的选取方法。仿真结果表明,当信道出现衰落时,单通道数据检测效果较差,而通过空时联合均衡可以使检测误码率显著降低,提高了水声传输系统的可靠性。

In order to cope with fading effect, a joint diversity combining and decision -feedback -equalization are used for acoustic signal detection in multipath fading underwater channel. Simulation performance is analyzed and the way to select equalizer parameters are given. Results show that single channel detection in fading channel gives bad performance while great improvement can be achieved through muhichannel diversity combining.