Hi all, I am trying to build transmission on air by using USRPs N210. The transmission is good with MPSK modulations but when i try to use 16_QAM i could not receive data (0 bytes at the reception). I tried to adapte transmission power, gain at the tranmitter, gain at receiver, samp_rate but the reception file still always empty. This is my flow graph: Tx: file source => packet encoder => QAM mod => mult constant = 0.4 => UHD usrp sink Rx : UHD usrp source => QAM demod => packet decoder => file sink samp_rate= 2M samples/symbol = 8 centre frequency=2.4G Any proposition will be appreciate Thanks to all
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