摘要
在宽频段跳频通信中,信号频率在一个很宽的频段中快速跳变,导致接收机的接收信号幅度会快速、大范围的波动,这就要求接收机的AGC不但覆盖频段宽、动态范围大,调整时间还要求尽量短,以减少其在跳频周期中的时间开销。提出并采用基于软件预校准的三前馈环同步调整技术,在保证AGC覆盖频段宽、动态范围大的同时,大大降低了调整时间。实测在50~3000 MHz的范围内,动态范围达到130 dB,恒包络情况下的调整时间6μs,非恒包络情况下的调整时间15.6μs。
In broadband frequency hopping communication,the signal frequency changes rapidly in a very wide frequency band,resulting in rapid and wide range fluctuation of the received signal amplitude of the receiver.This requires that the AGC of the receiver not only covers a wide frequency band and a large dynamic range,but also requires the AGC adjustment time to be as short as possible to reduce its time cost in the frequency hopping cycle.The synchronous adjustment technology of three feedforward loops based on software pre calibration is proposed and adopted,which can greatly reduce the adjustment time while ensuring the wide coverage frequency band and large dynamic range of AGC.The measured dynamic range is 130 dB within the range of 50 MHz~3000 MHz,and the adjustment time is 6μs under constant envelope modulation signal,and 15.6μs under non-constant envelope modulation signal.
作者
陈云刚
郑澍鹏
CHEN Yungang;ZHENG Shupeng(The 7th Institute of China Electronics Technology Group Corporation,Guangzhou 510310,China)
出处
《移动通信》
2023年第4期98-102,共5页
Mobile Communications
关键词
自动增益控制
动态范围
跳频
功率检测
预校准
AGC
dynamic range
frequency hopping
power detection
pre-calibration
