Hi Jiahui,
You should send your waveform file repeatly using command such as "for /L %I in (1,1,10000) do dut tx --sid 0", otherwise, your receiver will not be able to catch the signal.
In the received dump file, you should first remove the headers. The remaining IQ samples contain your sent waveform but the waveform is distorted by wireless channel.
-Jiansong