摘要
采用跳频通信方法来抗多途和码间串扰,比较了3种不同的接收方法:单一滤波接收方法、多路并行滤波接收处理方法和前置跳频滤波接收处理方法,后者采用PN码和递增序列2种跳频序列分别研究。仿真结果表明,递增跳频序列使误码率大大下降。当信噪比大于10dB,串扰信号与直达信号能量比小于0·6时,误码率可达到10-4。
The method of frequency hopping is adopted to resisting multipath and intersymbol interfer- ence（ISI） in acoustical communication. Three different received methods are compared,which are using single filter,collateral multi filters and preprocessing frequency hopping filters. The last method is studied on two frequency hopping sequence which are PN code and increased sequence. The simulation results show that the BER can be decreased by using the increased frequency hopping sequence. The BER reaches up to 10^-4 when signal noise ratio is greater than 10 dB, and the energy ratio of interfere and signal is litter than 0. 6.
出处
《舰船科学技术》
北大核心
2008年第3期118-121,共4页
Ship Science and Technology
关键词
跳频
水声通信
抗多途
码间串扰
frequency hopping
underwater acoustical communication
anti-muhipath
intersymbol interference
