一种基于谱相关特性的时差估计方法  

Method for Estimation of Time Difference of Arrival Based on Spectral Correlation Characteristics

作　　者：王江[1] 丁亚非[1] 毕大庆[1] 

机构地区：[1]电子工程学院,安徽合肥230037

出　　处：《无线电通信技术》2011年第6期17-19,32,共4页Radio Communications Technology

摘　　要：在现代无线电侦查所处的环境中,信号数量多,且复杂密集,通常会有多个信号同时进入接收机带宽范围。进入接收机的很多信号是循环平稳信号,循环平稳信号的谱相关特性具有选择信号的能力。基于循环平稳信号的谱相关特性,研究了一种可以对多信号进行时差估计的方法。理论分析和仿真验证表明,在多信号环境下,该方法可以准确估计各个循环平稳信号的时差,与广义互相关方法相比,该方法具有较强的抗干扰能力。The environment of radio reconnaissance is signal-intensive, and multiple signals may come into the bandwidth range of receiver simultaneously, many of which are cyelostationary ones. The spectral correlation of cyclostationary signals has signal selection capability. Based on the spectral correlation of cyclostationary signals, the paper studies a method of time difference of arrival （TDOA）estimation. Theoretical research and computer simulation indicate that the new method can achieve exact TDOA estimation of each signal in the environment of multiple signals. Compared with general cross correlation method, it has better anti-jamming capability.

关 键 词：循环平稳 谱相关 时差估计 

分 类 号：TN957[电子电信—信号与信息处理]