摘要
为了提高水声跳频通信系统的可靠性和保密性,提出了基于误码率映射和对伪随机数流的量化来产生跳频图案的方法,该方法将各个跳频频点的误码率映射为一个概率密度函数,由此得到量化向量,根据伪随机数发生器产生的满足特定统计规律的伪随机数流和特定的量化准则,对伪随机数流进行量化,生成跳频图案,进行跳频通信。构建基于概率的自适应跳频通信仿真系统,仿真结果表明基于概率的自适应跳频通信相对于传统的跳频通信或自适应跳频通信误码率更低,且保密性更强。
To improve the reliability and security of underwater acoustic （UWA） FH system, a method producing frequency hopping （FH） pattern is presented based on bit error rates （BER） mapping and the quantification of pseudo random numbers. BER of all FH channels are mapped into the probability densi- ty function （PDF）, a quantitative vector can therefore be obtained. Furthermore, the pseudo random numbers, produced by the pseudo random number generator, generate FH patterns according to the spe- cific statistical rule and quantitative criteria, which are used for FH communications. A specific adaptive FH communication simulation system based on probabilities is further established. Experimental simula- tion demonstrates that the proposed method has a lower BER compared with the traditional FH or adap- tive FH. Moreover, it features better security performance.
出处
《数据采集与处理》
CSCD
北大核心
2015年第3期585-590,共6页
Journal of Data Acquisition and Processing
基金
国家自然科学基金(51249005)资助项目
教育部博士点基金(20106102120013)资助项目
西北工业大学基础研究基金(NPU-FFR-JCY20130107)资助项目
关键词
水声通信
自适应跳频
概率
伪随机数量化
underwater acoustic communications
adaptive frequency hopping
probability
quantificationof pseudo random numbers
