短波广播数字化信道接收机的设计

随着广播事业的发展,传统的模拟接收机已经无法满足应用需求,尤其是对广播信号的多信道信号同步解调,模拟接收机无法实现。如果将模拟射频信号采用全数字化后,通过数字处理,就可以实现多信道信号同步解调,以及信号的存储。本文阐述了数字化信道接收机的设计过程,如何将模拟射频信号通过采样原理实现数字化,应用数字处理FFT技术及解调算法完成基带信号的解调。

Design of digitizing channel receiver for shortwave radio

With the development of the broadcasting, traditional analog receivers have been unable to meet the application requirements, especially for synchronous demodulation of multi-channel radio signal, analog receivers cannot achieve. If analog of RF signal can be digitized, it can realize multi-channel signal synchronous demodulation and signal storage. This paper expounds the design process of digital channel receiver, the realization of digitizing the analog RF signal by sampling theorem, the achievement of baseband signal demodulation by applying digital processing technology FFT and demodulation algorithms.