【摘要】 为解调遥测体制中常用的PCM/FM信号,在受到鉴频电路的启发后,提出了非相干包络检波算法,这种算法共包括限幅、求导、低通滤波3个步骤。详细讲述了这种解调算法的基本原理和实现过程,并对一些关键步骤做了着重说明,最后用MATLAB进行了仿真,画出了误码性能曲线。仿真结果表明该方法不仅能够有效抑制各种干扰、具有较好解调性能,而且原理简单、运行效率高。更多还原

【Abstract】 An non - coherent demodulation algorithm using envelope detection is introduced enlightened by the circuit for frequency demodulation according to the characteristic of common PCM/FM signal in the telemetering system. The algorithm has three steps: limit, derivation, and low - pass filter. The basic principle and application of this algorithm are discussed in detail and some key steps are explained. Finally, the software is designed on the MATLAB platform and performance curve is plotted. The result of computer simulation shows that this approach is not only good at anti - jamming and demodulation, but also simple and effective. The algorithm has a bright future in the application of PCM/FM signal demodulation.更多还原