TDOA参数估计算法

Research on TDOA Estimating Algorithms

对基于广义互相关法(GCC)的波束到达时间差(TDOA)估计算法的捕获概率进行了分析,推导了计算捕获概率的数值算法,并在此基础上,对2种常用TDOA估计方法的算法效率进行了比较.这2种方法分别为:直接对2个接收信号做互相关运算估计TDOA的方法;将2个接收信号分别与1个无噪声的m-序列做互相关运算来估计TDOA的方法.仿真结果表明,后者有较高的算法效率.

The acquisition probability of two popular algorithms are investigated, which are based on general cross correlation （GCC） algorithm and widely used to evaluate time difference of arrival （TDOA） coefficients. A numerical algorithm is proposed to calculate the acquisition probability of GCC, which lays a basis for the comparison between these two algorithms. In order to evaluate the TDOA, one of these algorithms is correlating the input signals directly while the other correlates the two input signals with a noiseless m-sequence separately. The simulation result proves that the later has higher algorithm efficiency.