摘要
针对VHF/UHF波段接收机射频模拟前端(RFAF)对动态范围的影响问题,在多射频接收链路模型中添加中频自动增益控制(IFAGC)电路模块,仿真结果表明使用IFAGC电路进行二次增益调节,可保证接收机稳定工作,同时能够减小由RFAGC电路引起的瞬时动态范围的波动变化。
In order to minimize the influence by radio frequency analog front-end （RFAF）of VHF/UHF band receivers on dynamic range,one module,called ＂intermediate frequency automatic gain control （IF AGC） circuit＂ has been added in the multi-link RF models.Simulation results show that the system guarantees the receivers＇ stability in the secondary gain regulation,and at the same time,reduces the volatility of instantaneous dynamic rangecansed by RF AGC circuit.
出处
《电子设计工程》
2009年第6期90-92,共3页
Electronic Design Engineering
关键词
射频模拟前端
接收机动态范围
自动增益控制
radio frequency analog front-end
dynamic range of receiver
automatic gain control
