摘要
减少单个码元长度提高FSK信号频带利用率的方式会造成可靠性下降的问题,传统的检测方法往往达不到可靠性要求。利用混沌振子检测FSK信号的特点,提出了一种检测短码元长度FSK信号的方法。该方法通过从FSK信号中提取的先验频率信息,构造待检测序列,然后输入到混沌检测系统进而实现短码元FSK信号的检测。仿真实验表明,信噪比为-20 dB时,该方法检测短码元FSK信号的误码率为29.7%。
The way of decreasing the length of every code element to further improve bandwidth efficiency of FSK signal will cause decline of reliability and the traditional detection methods can＇t meet the reliability demand of detection.In this background, a way to detect short code element length FSK signal will be put forward which is based on the characteristic of chaotic detection of FSK signal. This way realize the detection process by three steps： Getting prior frequency information, building up to-be-detected sequences, and then put them to the chaotic detection system. The simulation experiments show that this way has 29.7% error rate when detecting a short code element length FSK signal in-20 dB SNR.
作者
芮国胜
吴前龙
刘林芳
刘歌
Rui Guosheng;Wu Oianlong;Liu Linfan;Liu Ge(Signal and Information Processing Provincial Key Laboratory in Shandong,Nava Astronautical University,Yantai 264001,China)
出处
《电子测量技术》
2018年第20期44-48,共5页
Electronic Measurement Technology
基金
国家自然科学基金(41606117,41476089,61671016)资助项目
关键词
短码元长度
先验频率
待检测序列
误码率
short code element length
prior frequency
to-be-detected sequences
error rate
