一种L波段的模数混合快速AGC

A Fast Digital-Analog Mixed AGC in L Band

在高速突发通信中,自动增益控制(AGC)模块是非常重要的组成部分。为了有效降低开销,提高系统利用率,AGC必须能够在一个突发时隙内快速收敛。提出了一种L波段的模数混合AGC,它通过帧结构中的重复训练序列来实现对模拟数控衰减器的控制,从而将接收信号电平快速调整到解调需要的最佳电平上。实测结果表明该AGC工作频段高,动态范围大,且能够在11μs内快速收敛。

The automatic gain control(AGC)is an important module in high speed burst communication.In order to reduce the overhead effectively and increase the utilization of system,the AGC module is required to converge quickly in a burst slot.A fast digital-analog mixed AGC in L band is proposed in this paper.It takes advantage of repeated training sequence in frame to control the analog numerical attenuator,so as to adjust the level of received signal to be optimum level for demodulator.The test results show that this AGC can work in high band of L band and have high dynamic range,especially can be quickly converged in less than11microsecond.