%0 Journal Article
%T An improved scheme for secondary synchronous channel acquisition in W-CDMA system<br>W-CDMA系统中辅同步信道捕获的改进
%A Niu Kai
%A Zhu Chunmei
%A Wu Welling
%A <br>牛凯
%A 朱春梅
%A 吴伟陵
%J 电子与信息学报
%D 2003
%I 
%X The timing relationship between base stations is asynchronous in W-CDMA system. So the three-step cell search algorithm is introduced in 3GPP protocols in order to identify the special base station quickly. The second step, Secondary Synchronous CHannel(S-SCH) acquisition, is much critical, but the computing complexity of the conventional matched filter bank method is very large. This paper proposes Partial Fast Hadamard Transform(PFHT) according to the S-SCH structural property, which extremely reduces the computing complexity to almost 70%. On the other hand, a distributed sub-graph search algorithm is put forward to save more complication than RS code table brute-force search. In a word, the hardware complexity is dramatically cut down by the improved scheme, which is valuable for engineering applications.
%K Matched filter bank
%K Partial fast Hadamard transform
%K Brute-force search algorithm
%K Distributed sub-graph search algorithm<br>W－CDMA系统
%K 同步
%K 信道
%K 捕获
%K 匹配滤波器组
%K 哈达玛变换
%K 穷举搜索算法
%K 分布式子图搜索算法
%K 码分多址
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=EFC0377B03BD8D0EF4BBB548AC5F739A&aid=C02A1BFC7509ADB0&yid=D43C4A19B2EE3C0A&vid=C5154311167311FE&iid=CA4FD0336C81A37A&sid=F24949CFDB502409&eid=480C51B1F0CE0AB6&journal_id=1009-5896&journal_name=电子与信息学报&referenced_num=0&reference_num=5