卫星干扰源定位系统中到达时差检测方法研究  

TDOA detection algorithm in interference location for satellite systems

作　　者：刘颖[1] 张继旺[1] 黄道超[1] 

机构地区：[1]北京交通大学电子信息工程学院,北京100044

出　　处：《合肥工业大学学报（自然科学版）》2009年第9期1304-1307,1324,共5页Journal of Hefei University of Technology：Natural Science

基　　金：北京交通大学基金资助项目(2007RC031);北京市自然科学基金资助项目(4073038)

摘　　要：为了进一步提高卫星干扰源测时差定位的性能,文章提出了一种基于小波变换和奈曼-皮尔逊准则的到达时间差参数估计方法。该方法利用小波去噪特性,在低信噪比环境下,能够准确估计接收信号的TDOA参数,为提高卫星干扰源定位性能提供了有效方法;通过选择最佳小波基函数对接收信号直接进行加权处理,减小了传统小波变换过程中的运算量,仿真结果验证了算法的可靠性和有效性。In order to enhance the performance of interference location for satellite systems based on TDOA measurement, a new TDOA parameter estimation method is presented based on wavelet trans- form and the Naiman-Pearson principle. By the use of the characteristic of the wavelet de-noising, TDOA estimation is convergent to the true value with a high probability in the low signal-to-noise ratio（SNR） environment and the performance of interference location for satellite systems is improved. By choosing an appropriate wavelet function to process the wavelet transform as weighted calculation, the processing burden can be reduced greatly during wavelet transform. The simulation results illustrate the reliability and effectiveness of this new TDOA estimation method.

关 键 词：无线通信技术 参数估计 干扰源定位 到达时间差 小波变换 

分 类 号：TN97[电子电信—信号与信息处理]