分布式互相关被动定位模型与实验

研究长基线分布式阵元的互相关被动定位问题,提出了常规双曲面交汇定位模型和双曲面迭代搜索定位模型。浅海实验证实了窄带信号的空间相关半径至少可达3 000～4 000 m,信道建模仿真表明,分布式互相关可能因冲激响应各异而发生相关峰分裂并导致相关损失,但浅海实验的测试情况较为理想。给出了目标机动与积分时间容限的理论公式。浅海低速目标实验表明,上述2种定位模型均能稳健实现航迹跟踪。

Distributed cross-correlation model and experimental study of passive positioning

In this paper,the problem of cross-correlation passive positioning with distributed array of long baseline was studied,and positioning model of conventional hyperboloid intersection and location model of hyperboloid iterative search were proposed.Experiment in shallow waters demonstrated that the spatial correlation radius of narrow-band signal reach at least up to 3 000～40 00 m eters.Simulation of channel modeling showed that distributed cross-correlation peak split and caused loss due to the impact of impulse response differences,but testing in shallow waters is an ideal case.The theoretical formula of tolerance of target motion and integration time was given.Trial in shallow waters showed that the trajectory tracking of low-speed target was sound with the two positioning models above.