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AWR1642: How to solve the problem of over range?

Part Number: AWR1642
Other Parts Discussed in Thread: IWR1642

Hi, I used the profile of srr_config_chirp_design_USRR20 in IWR1642 demo,and I encountered the following problem:

When there is an obstacle with a large RCS between 20 and 30m, the radar will detect a false target at close range .

I think it is because the obstacle's distance exceeds the range of USRR20,so I would like to ask if IWR1642 can support setting the bandwidth range of IF filter.

In order to fully suppress the over  range target echo signal?