数字调幅广播系统中包络检波方法的研究

The Research of Wrap Demodulation in Digital AM Broadcasting System

介绍了数字调幅广播的检波方法,给出了两种实现检波的实际算法:FFT和DCT,重点论述了两种算法的原理以及在实现数字广播包络检波过程中的工作原理。最后利用MATLAB对这两种方法进行了性能仿真并比较了两种检波方法的误码率。

In this paper we introduce the demodulation method of digital AM broadcasting at first, and then give out two arithmetics ： FFT and DCT. We discuss the principles of two arithmetics and their principles in demodulation of digital AM. Lastly we actualize this system＂ wrap demodulation in FFT and DCT arithmetics, and compare their performance of two methods.