基于离散Hartley变换的频移键控信号解调算法研究  

Study on Discrete Hartley Transform-based Demodulation Algorithm for the FSK Signal

作　　者：戴文辉[1] 梁鉴如[1] 

机构地区：[1]上海工程技术大学电子电气工程学院,上海硕士研究生201620

出　　处：《城市轨道交通研究》2015年第8期89-91,97,共4页Urban Mass Transit

基　　金：上海申通地铁集团有限公司"集中式屏蔽门安全控制监测装置研究"项目(JS-KY13R036-2);上海工程技术大学"地铁屏蔽门PSD系统信号检测研究"项目(CZ-151002)

摘　　要：对基于DHT(离散Hartley变换)的二进制频移键控(FSK)信号的数字化解调算法进行研究。实际接收到的FSK信号码元波形分为过渡区和稳定区,在解调时只使用码元稳定区中若干个载波周期内的采样值作Hartley变换运算,计算出对应于1码和0码载波频率的幅值信息,根据幅值的大小来判决,从而恢复数字信号。对高斯噪声背景下该解调算法的误码性能进行了分析。位同步也可以通过Hartley变换来实现。理论分析和TWC(车地通信)应用表明:该解调算法具有计算量小、抗干扰性能好等优点。In this paper, DHT-based digital demodulation algorithm for FSK signal is studied. As the yard wave of FSK signal can be divided into transitional section and steady section according to the actual conditions, only sam- ples of several carriers in steady section are uscdin DHT operation to calculate the amplitude of the carrier frequencies of code l and code 0, in order to recover the digital signal by judging the amplitudes. The system performance of the BER performance of the algorithm in presence of Gauss white noise is analyzed, the bit synchronization can also be achieved by adopting DIFF. Application of WTC and theo- retical analysis show that this method features little calcula- tion and good noise-resisting performance.

关 键 词：HARTLEY变换 数字化解调 频移键控 误码率 

分 类 号：TN911.3[电子电信—通信与信息系统]