%0 Journal Article
%T The Estimation and Compensation of Doppler Effect on Underwater Acoustic Spread Spectrum Communication<br>水声扩频通信中多普勒估计与补偿算法研究
%A Yuan Zhao-kai
%A Sui Tian-yu
%A Li Yu
%A Huang Hai-ning
%A <br>袁兆凯
%A 隋天宇
%A 李宇
%A 黄海宁
%J 电子与信息学报
%D 2012
%I 
%X The Doppler effect is inherent in communication systems which makes the carrier synchronization critical to the whole system. In underwater communication environment, the Doppler effect is more severe due to the limited sound speed. In this paper, the Doppler effect of underwater channel is analyzed by formulas on a software-defined radio communication system. Then an effective algorithm is developed which can estimate and compensate the frequency shift. The simulation results show that this algorithm works out within the speed of 15 m/s, when the signal to noise ratio is above -22 dB. The sea experimental results show that the system can successfully achieve the carry wave synchronization with the speed to be 6 knots.
%K Underwater acoustic spread spectrum communication
%K Doppler effect
%K Carrier synchronization<br>水声扩频通信
%K 多普勒效应
%K 载波同步
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=EFC0377B03BD8D0EF4BBB548AC5F739A&aid=3B8BF30E16FD5CB094A53ADEC0D366E9&yid=99E9153A83D4CB11&vid=339D79302DF62549&iid=CA4FD0336C81A37A&sid=987EDA49D8A7A635&eid=014B591DF029732F&journal_id=1009-5896&journal_name=电子与信息学报&referenced_num=0&reference_num=12