Implement AGC with USRP2920

[guigui004]

As the title shows,i want to implement AGC(Automatic Gain Control) with  usrp2920,but i do not find a good way to it.

Has anybody done this work( or something like this) before?

please help me,thanks! 

[vvkakade · Accepted solution]

Hi,

One of the typical requirements for AGC is low latency of gain change.

A host based gain control usually done not satisfy these latency requirements and hence the need to implement AGC on FPGA.

If you are using the USRP 2920 with the niUSRP API (which uses fixed FPGA image) you wont be able to implement a FPGA

based AGC.

If you can do with host based AGC control there is no native support available in the API and you will have to implement something on your own as far as I know.

However if you move to the USRP RIO platform and use one of our USRP RIO devices (FPGA can be modified to support AGC) there is some support for AGC available, at least you have a means of implementing it on the FPGA and staying in the LabVIEW platform.

https://forums.ni.com/t5/USRP-Software-Radio/AGC-implementation-in-LabView-FPGA-for-NI-USRP-RIO/td-p...

What is USRP RIO?

[guigui004]

thank you!!

[torry]

Have you solved the AGC(Automatic Gain Control) with usrp2920？if solved，please tell me, think you!