虚源法辅助的高效波导不变量被动测距技术

High Efficiency Waveguide Invariant Passive Ranging Technology Assisted by Virtual Source Method

针对水声通信网络节点拓扑结构测量需求,本文研究了基于波导不变量的高精度被动测距算法,为解决波导不变量法计算量大的问题,提出了一种虚源法辅助的高效率节点间距离测量算法。考虑到海水中的声速受海水的温度,盐度,深度等因素影响,故采用声速补偿方法得到更合适的声速,从而提高测距精度。仿真结果表明,结合声速补偿的虚源法测距结果误差明显下降。在结合声速补偿虚源法缩小测距范围的基础下,波导不变量精确测距的计算量明显降低,同时测距结果精度也得到提高。从而得出结论,基于结合声速补偿虚源法的波导不变量被动测距技术可以在降低计算量的同时实现精确测距。

According to the measurement requirements of underwater acoustic communication network node topology structure,a high precision passive ranging algorithm based on waveguide invariant is studied in this paper. To solve the problem that waveguide invariant method requires a large amount of computation, an efficient node-to-node distance measurement algorithm assisted by virtual source method is proposed.Considering that sound velocity in seawater is affected by temperature, salinity, depth and other factors, sound velocity compensation method is adopted to obtain more appropriate sound velocity, so as to improve the accuracy of ranging. Simulation results show that the error of virtual source method combined with sound velocity compensation decreases obviously. On the basis of reducing the range with the virtual source method of sound velocity compensation, the computation of the waveguide invariant accurate ranging is obviously reduced, and the precision of the ranging result is also improved. It is concluded that the waveguide invariant passive ranging technology based on the virtual source method with sound velocity compensation can achieve accurate ranging while reducing the computation.