摘要
在时差定位(TDOA)技术中,高精度的时延测量是准确定位的关键。本文首先对伪随机序列进行了简要的介绍,然后具体阐述了最常用的一种伪随机序列——m序列以及它在时延测量中的应用。根据m序列良好的自相关特性,计算发送序列和接收序列之间的相关函数,其峰值所在的位置即为时延值。最后利用MATLAB对测量方法进行了仿真,并分情况讨论了噪声干扰和m序列的周期对时延测量的影响。
Delay measurement is the key to TDOA technology. This paper first introduces the PN sequence, and then summarizes the m sequence which is commonly used and its application in delay measurement. According to the good autocorrelation characteristic of m sequence, through computing the correlation function between the transmitting sequence and receiving sequence, the position of its peak is the delay value. Finally, through the simulation by MATLAB, the influence of noise and the period of m sequence in different situation are discussed.
出处
《国外电子测量技术》
2009年第1期30-32,共3页
Foreign Electronic Measurement Technology
