%0 Journal Article
%T Spread-Spectrum Code Acquisition Based on Pilot Symbols in the Presence of Large Doppler Shift<br>大Doppler频移条件下基于导频信号的扩频码捕获
%A Wu Tuan-feng
%A Zhu Ai-min
%A <br>吴团锋
%A 朱爱民
%J 电子与信息学报
%D 2005
%I 
%X The influence of Doppler shifts on traditional acquisition algorithms is analyzed. A new method for spread-spectrum code acquisition of pilot symbols in the presence of large Doppler shifts is proposed, in which the outputs of partial matched filters are delivered to an Adaptive Line Enhancer (ALE) directly and an estimated frequency is produced. After frequency offset compensation, spread-spectrum code acquisition is performed by traditional spread-spectrum code acquisition algorithm. Simulation results show that the new method eliminates the influence of large Doppler shifts effectively, with fast acquisition time.
%K Spread-spectrum code
%K Large Doppler shift
%K Partial matched filter
%K Adaptive Line Enhancer (ALE)<br>扩频码
%K 大Doppler频移
%K 部分匹配滤波器
%K 自适应谱线增强器
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=EFC0377B03BD8D0EF4BBB548AC5F739A&aid=A79E392D5CEC879D&yid=2DD7160C83D0ACED&vid=DB817633AA4F79B9&iid=B31275AF3241DB2D&sid=0B757E9DCA0EC579&eid=F90340A344159B2E&journal_id=1009-5896&journal_name=电子与信息学报&referenced_num=1&reference_num=5