无源定位中基于小波变换的相位差去噪研究

实际工程中相位干涉仪的测量误差较大,造成相位差变化率定位算法的收敛速度较慢。利用小波阈值降噪法对相位差及其变化率信息进行平滑滤波,可以在相位差测量误差较大情况下进行快速高精度定位,而且观测间隔越短,抗噪性能越好,定位精度越高。仿真证明了算法的有效性。

Research on phase difference de-noising based on wavelet transformation in passive location

As the phase difference error measured with phase-interferometer is great in practice,the convergent speed of the passive location algorithm of phase difference change rate is lower.An algorithm is presented,which makes use of wavelet threshold de-noising algorithm to smooth the phase difference and the change rate of phase difference.Then the radiant target can be located quickly and accurately in the condition of great measuring error of phase difference.And the shorter the observation time of the phrase difference date,the better the anti-noise capability,the higher the location precision.Simulation shows the effectiveness of the algorithm.