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FMComms3/no-OS, how to config AGC for receiving WiFi waveform

Question asked by ScottLee2010 on Sep 10, 2015
Latest reply on Feb 7, 2017 by sripad

Hi all,

     I use fmcomms3 for receiving WiFi signal, but fast AGC is not quite suitable for the first received frame. Our receiver in FPGA has been testified to work well when process USRP received signal. But it doesn't from fmcomms3 received waveform because of AGC. Waveform is listed below.

fagc_QAM16_1_2_100bytes.png

     Our requirements are as follows. Signal gain is adjusted into suitable amplitude within 80 samples(4us), and remaining stable during this frame. As we can see from the waveform applying default fast-AGC configuration, signal gain decreases quickly and jolts afterwards. However, we need the gain keep stable after adjustment.

     My question is how can I config fAGC param to reach my goal?

     Thank you for any answer or suggestion.

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