一种实用的通信信号时差估计模型

在实际三站或多站时差定位系统中，接收转发信号和直达信号的两接收机的中频输出信号存在频差，从而影响时差估计精度。为了尽量消除这一影响，提出了一种通用的快速的时差估计模型，并进行了仿真。仿真结果显示：该模型消除了频差的影响，提高了时差测量精度和速度。

Real TDOA Estimation Model for Communication Signal

In the real three station TDOA locating system,there is frequency difference between IF output of the receiver receiving direct signal and IF ouput of the receiver recieving indirect signal ,which decreases the TDOA estimation precision.For reducing the impact from FD,this paper presents a useful and fast model to estimate TD ,then simulates the model.The simulation shows that the model reduces the effect of FD,improves the performance of TDOA estimation and decreases the computational load.