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measure channel Gain in TDD system

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I want to measure channel gain between RX-TX pairs during each symbol period using USRP RIO  and Lab view Communication Design Suite.

 

Suggested meathods? Is there functionality of RSSI measurement?

 

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Solution
Accepted by topic author Wired_

Send a known signal.

 

Receive the signal and measure I(n)^2 + Q(n)^2, given the information of sent signal, which basically corresponds to signal strength.

 

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