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总览 评价 杨晓文 , 申晓红 , 姜喆 , 王海燕 * , 赵瑞琴 ( 西北工业大学航海学院,西安,710072; ) 摘要: 本文提出了基于误码率的映射和对伪随机数流的量化来产生跳频图案的方法,重点阐明了量化准则,构建了基于概率的自适应跳频通信仿真系统。该方
杨晓文, 申晓红, 姜喆, 王海燕*, 赵瑞琴
(
西北工业大学航海学院,西安,710072; )
摘要:
本文提出了基于误码率的映射和对伪随机数流的量化来产生跳频图案的方法,重点阐明了量化准则,构建了基于概率的自适应跳频通信仿真系统。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。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,保密性更强。该方法可以提高水声通信系统的可靠性和保密性。?
关键词:
通信技术;自适应跳频;概率;伪随机数量化;水声通信?????
YANG Xiaowen, SHEN Xiaohong, JIANG Zhe, WANG Haiyan*, ZHAO Ruiqin
(
School of Marine Engineering,Northwestern Polytechnical University,Xi'an,710072; )
Abstract:
This paper put forward a method producing frequency hopping(FH) pattern based on Bit error rates(BER) mapping and the quantification of pseudo random numbers, focusing attention on quantitative criteria, also established a specific adaptive FH communication simulation system based on probability. BER of all FH channels are mapped into a probability density function(PDF), and then getting quantitative vector, the pseudo random numbers produced by the pseudo random number generator corresponding with specific statistical rule are quantified according to specific quantitative criteria, thus producing FH pattern used for communications. Compared with traditional FH or adaptive FH, adaptive FH based on probability has lower BER, furthermore, it features higher security. The proposed method can improve the reliability and security of underwater acoustic(UWA) FH system.
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