摘要
文中对基于DHT的二进制频移键控(FSK)信号的数字化解调算法进行研究。FSK信号的码元分为过渡区和稳定区,而在实际解调时只考虑稳定区中的若干个载波的采样值作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。在高斯噪声背景下,对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。理论分析和仿真结果表明该解调算法具有计算量小、抗干扰性能好等优点。
It studies DHT-based digital demodulation algorithm for FSK signal in this paper. As the yard wave of FSK signal can be divided into transitional section and steady section,in the actuality, only samples of several carders in steady section are used to do DHT operation to calculate the amplitude of the carder frequencies of code 1 and code 0, and then recover the digital signal by judging the amplitudes. The the BER performance of the algorithm in presence of Gauss white noise is analyzed. Bit synchronization can also be achieved by doing DHT. Theoretical analysis and simulation results show this method is of little calculation and good noise-resisting performance.
出处
《计算机技术与发展》
2014年第9期73-76,共4页
Computer Technology and Development
基金
上海市教育创新项目理科重点项目(12ZZ182)
