船载式水声定位系统信号处理改进算法研究

针对船载式水声定位系统的特点,在座底式等常规水声定位系统信号处理算法的基础上,对船载式系统可能出现的声脉冲叠加现象进行仿真分析,证明常规算法存在丢失数据的可能性,并且常规算法对声信号幅度变换较快的情况难以适应。提出一种并行实时数字信号处理算法,允许每块数据拥有不同的属性,并采用数据匹配方法进行后置冗余处理,获得有效数据。经过湖上跑船试验证明,该算法具有更高的检测率,并能提高跟踪轨迹的平滑性和真实性,具有较高的工程应用价值。

The improved signal processing algorithm for ship-borne acoustic positioning system

In consideration of the characteristics of ship-borne acoustic positioning system, based on the signal processing algorithms for conventional acoustic positioning systems, the simulation and analysis of sound pulses superimposition phenomena appearing in ship-borne system has been made, and the results show that the conventional algorithms could lose the data probably, and they are difficult to adapt to the situation where the acoustic signal amplitude varies too fast. A parallel real-time digital signal processing algorithms is presented on this paper, which allows each piece of data having different properties, uses the data-match method to process the rear redundant, and finally obtains the valid data. After the dynamic test of ship navigation, it is proved that the algorithm has higher detection rate and can improve the authenticity and smoothness of the tracking trajectory.