接收机射频前端电路的仿真设计

The Circuit Simulation of RF Front-end

软件无线电的基本思想是构建一个通用的硬件平台,将模数转换尽可能的靠近天线,并尽量通过软件来实现无线电功能。作为软件无线电关键技术之一的射频前端技术,射频前端主要完成低噪声放大、滤波、混频等功能,实现模拟射频信号和模拟中频信号之间的转换,从而解决A/D和D/A的速率、精度等无法达到对射频模拟信号直接进行采样的问题。以直接变频结构为基础,在确定集成芯片的基础上进行了接收机射频前端电路的仿真,并对仿真结果进行了分析。

The basic idea of software defined radio is to build a universal hardware platform. Analog to digital conversion is close to the antenna as much as possible, software define the system. Radio Frequency （RF） front-end technology is one front-end features include low-noise amplifier, of the key technologies of Software Defined Radio. RF filter, mixer and other functions. The analog RF signal is converted into the analog Intermediate Frequency signal, and the A/D and D/A rate, accuracy can meet the need of direct sampling of analog RF signal. The circuit simulation of RF front-end is carried out on the basis of determined integrated chip. The simulation results are analyzed accordinglv.