摘要
文章介绍了多进制数字调制中的频率解调。文中在多进制数字频率调制系统模型基础上,引入了M进制频率调制信号的表达式,采用嵌入傅氏变换理论和概率密度函数的方法,对M进制FSK信号的相位相干解调和非相干解调系统进行了分析,得到了系统的检测器采样值和最佳检测器将选择最大后验概率所对应的输出信号表述式的解析结果。
The M-ary frequency demodulation and detection are introduced in this paper. On the basis of the model of M-ary digital frequency modulation system, this paper introduces the expression of M base frequency modulation signal, uses embedded Fourier transform theory and the method of probability density function to analyzes the phase coherent demodulation system and noncoherent demodulation system of the FSK signal, finally obtains the system detector＇s sampling values and the analytical results of output signal expression corresponding to the optimum detector choosing the maximum posteriori probability.
出处
《电子技术（上海）》
2014年第3期23-26,共4页
Electronic Technology
基金
福建省教育厅自然科学基金资助项目(JA12456)
关键词
数字调制
码元
比特
高斯噪声
采样
digital modulation
code bit
bit
Gauss noise
sampling
