基于超外差变频结构接收机前端系统设计

摘要

In recent years, the development of wireless communication technology has been developed,especially the shortwave reception technology is the most rapidly developing branch,which has a very high research and development value. Wireless communications technology has been widely applied to various fields of daily life. The receiver RF front end,as an important part of the receiver, is the key component of the dynamic performance. It works at the back of the RF filter. In this paper, as a focus on RF receiver,on the use of super heterodyne receiver dual conversion architecture, combined with digital frequency synthesis technology,completed the GMSK receiver RF front-end system design and implementation. Involved in the design process, has certain innovation and originality.%近年来无线通信技术获得了惊人的发展，而短波接收技术作为其中发展最为迅速的一个分支，已经广泛应用到人们生活中的各个领域，具有很高的研究与开发价值。接收机射频前端作为接收机重要组成部分，是接收机动态性能的关键部件，它工作于射频前置滤波器的后面。以接收机射频前端作为研究重点，采用超外差变频体系结构，结合数字频率合成技术，完成了GMSK接收机射频模拟前端系统的设计与实现。设计过程中所涉及到的技术，具有一定的创新和独到之处。