%0 Journal Article
%T A Novel Hybrid Modulation Scheme for PUot-assisted Block Transmission Technology<br>基于分段混合调制的导频辅助块传输技术研究
%A Zhang Lei
%A Jiao Xian-jun
%A Chen Jiang
%A Xiang Hai-ge
%A <br>张磊
%A 焦现军
%A 陈江
%A 项海格
%J 电子与信息学报
%D 2008
%I 
%X When PABT (Pilot-Assisted Block Transmission) signal is transmitted over severe multipath channels, consecutive pilot block and data block may partially overlap each other. If no guard interval is inserted between them, a process to cancel the mutual interference is usually adopted in the receiver. But this process, as well as channel equalization, may suffer severe performance degradation when channel estimation is not so reliable. A hybrid modulation scheme is proposed in this paper, in which the overlapped part in data block is modulated using lower order constellation, while the other part keeps using higher order constellation. Its advantage in BER performance and robustness over conventional PABT schemes is demonstrated with simulation in some multipath channels with large delay spread.
%K Wireless communication
%K Pilot-assisted block transmission
%K Hybrid modulation<br>无线通信
%K 导频辅助块传输系统
%K 分段混合调制
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=EFC0377B03BD8D0EF4BBB548AC5F739A&aid=90F8D356E6948862BA09E5D244E23B8B&yid=67289AFF6305E306&vid=340AC2BF8E7AB4FD&iid=E158A972A605785F&sid=1471D37D8144EBCF&eid=6920A1020E13BE87&journal_id=1009-5896&journal_name=电子与信息学报&referenced_num=0&reference_num=19