%0 Journal Article
%T SNR Analysis of LFM Signal with Gaussian White Noise in Fractional Fourier Transform Domain<br>高斯白噪声背景下的LFM信号的分数阶Fourier域信噪比分析
%A Liu Jian-cheng
%A Liu Zhong
%A Wang Xue-song
%A Xiao Shun-ping
%A Wang Guo-yu
%A <br>刘建成
%A 刘忠
%A 王雪松
%A 肖顺平
%A 王国玉
%J 电子与信息学报
%D 2007
%I 
%X Due to the motion of a target,radar return signals are usually LFM signals with unknown frequency and unknown frequency modulated rate.Fractional Fourier transform has recently attracted much attention in detection and parameter estimation of multi-component LFM signals.Fractional Fourier transform of LFM signal of finite duration is derived and a relation between coordinate of the peak and unknown parameters is given. Statistical characteristic of LFM signal with white noise in fractional Fourier domain is studied,a closed form expression is found for Signal-to-Noise Ratio(SNR),and it is compared with matched filter of ideal situation (i.e. parameters of LFM signal are known).
%K LFM signal
%K Parameters estimation
%K Fractional Fourier transform
%K Signal-to-Noise Ratio(SNR)<br>LFM信号
%K 参数估计
%K 分数阶Fourier变换
%K 信噪比
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=EFC0377B03BD8D0EF4BBB548AC5F739A&aid=3A3B6EBA50BEC1A21814EE5D8C4C7A35&yid=A732AF04DDA03BB3&vid=771469D9D58C34FF&iid=F3090AE9B60B7ED1&sid=207501BB55D33ABC&eid=D9E727AAB71FE4BA&journal_id=1009-5896&journal_name=电子与信息学报&referenced_num=0&reference_num=16