摘要
针对伪码调相与线性调频复合调制定距系统的定距精度差的问题,提出一种基于自相关函数包络检测的复合调制定距方法。把微弱信号检测方法应用于复合调制定距系统,建立自相关函数包络检测方法的定距原理,推导复合调制探测系统的定距方程,建立复合调制定距系统的虚拟样机,分析其定距性能。仿真结果表明,该方法较伪码调相定距方法,定距精度有明显改善。该方法可以有效应用于无线电测距系统。
For the problem of poor ranging accuracy in complex modulation ranging system with pseudo code phase modulation (PM) and linear frequency modulation (LFM), we proposed a complex modulation ranging method which is based on autocorrelation function envelope detection. We applied the weak signal detection method to complex modulation ranging system, set up the ranging principle of autocorrelation function envelope detection method, deduced the ranging equation of complex modulation detection system, established virtual prototype of complex modulation ranging system, and analysed its ranging performance. Simulation results showed that compared with pseudo code phase modulation ranging method, its ranging accuracy was improved greatly. This method can be effectively used in radio ranging system.
出处
《计算机应用与软件》
CSCD
2015年第9期123-126,共4页
Computer Applications and Software
基金
科技部2014年度课题(2014EG113174)