%0 Journal Article
%T CARRIER EXTRACTION OF QPSK BASEBAND DIGITAL DEMODULATION<br>QPSK基带数字相干解调的载波提取
%A Chen Jiaofang
%A <br>陈教芳
%J 电子与信息学报
%D 1991
%I 
%X The principle and structure of the carrier recovery PLL of baseband digl-tal coherent demodulation are presented, and the performance of this PLL is analysed. Comparing with the "four times frequency" method under the same conditions, the signal to noise ratio of this PLL is 5-10dB higher. The experimenta! results show that the recovered carrier is stable.
%K Digital communication
%K Coherent demodulation
%K Phase-lock loop<br>数字通信
%K 相干解调
%K 锁相环
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=EFC0377B03BD8D0EF4BBB548AC5F739A&aid=06576A042788000D&yid=116CB34717B0B183&vid=FC0714F8D2EB605D&iid=94C357A881DFC066&sid=B34BDD6A690A04C0&eid=4002B7787911C73B&journal_id=1009-5896&journal_name=电子与信息学报&referenced_num=0&reference_num=4