摘要
介绍了一种基于软件无线电技术的通用数字解调方法,该方法属于非相干解调方式的一种,它是对FSK过零检测解调法的一种改进,使之能够对多种数字调制信号进行解调.通过对调制信号幅度包络进行分层变换,将复杂的采样数据转变成只包含几个简单数值的数字序列,然后分析该数字序列的数值变化情况,从而实现解调.最后,在以TMS320C5416为核心的DSP开发板上对该方法进行了测试实验.实验结果表明,该方法能够有效地解调多种类型的数字调制信号,且算法结构简单,实时处理能力强.
This paper introduces a multipurpose digital demodulation method based on SDR, which is one kind of non-coherent demodulation types. And it is an improvement of zero crossing detection method generally used in FSK demodulation, by which many digital modulation signals can be demodulated. By the means of layering the amplitude envelope of modulation signal, the complex sampled data is transformed into digit sequence that is made up of several simple numbers. Then the multipurpose digital demodulation is completed with analyzing the digit sequence. At last, some testing experiments about this method are made in the DSP, development broad whose core is TMS320C5416 chip. The results indicate that this method is very effective and efficient with the characters of simply algorithm construction and strong real-time processing capacity.
出处
《长沙交通学院学报》
2008年第1期68-71,共4页
Journal of Changsha Communications University
关键词
通用数字解调
软件无线电
包络分层
非相干
数字信号处理器
multipurpose digital demodulation
software defined radio（ SDR）
envelope-layering
non-coherent
digital signal processor（DSP）
