基于FPGA的快速自动增益控制系统设计

Design of a Fast Automatic Gain Control system based on FPGA

快速自动增益控制(Automatic Gain Control,AGC)系统可以扩大接收机的动态范围,同时保证系统响应时间。本文提出了一种快速峰值检测算法,并应用于实际AGC系统。首先分析了快速峰值检测算法的准确性,然后进行计算机仿真,最后完成了基于FPGA的快速AGC系统硬件实现。理论分析,计算机仿真及硬件测试证明,应用快速峰值检测算法的AGC系统响应时间可达微秒级。

Fast Automatic Gain Control system can enlarge the dynamic range of the receiver, and ensure the system response time, A fast peak value detection algorithm is proposed in this paper and applied in the AGC system. The AGC system is implemented on FPGA. The response time of the AGC system is about several microseconds, and is proved by the hardware testing.