Hoo-chang Shin wrote:
Hi,I'm trying to send a pre-saved OFDM file to a transmitter USRP, and to receive the signal from a receiver USRP. >From the 'benchmark_ofdm_tx.py' I've saved the OFDM signal to a file using 'gr.file_sink', instead of sending it to 'usrp.sink_c'. And then I want to read the data from the saved file and send it though the transmitter USRP, and receive it from the other USRP, but does not work. Could anyone give tip, why it does not work? Or give help how to make it work? This is my code: #!/usr/bin/env python from gnuradio import gr from gnuradio import usrp from numpy import * class send_from_file_graph (gr.flow_graph): def __init__(self): gr.flow_graph.__init__(self)filename = 'tx_usrp_data.dat'# which I had saved from 'benchmark_ofdm_tx.py' using 'gr.file_sink(gr.sizeof_gr_complex, filename)' src = gr.file_source ( gr.sizeof_gr_complex, filename, False)self.v_snk = gr.vector_sink_c() # setup usrpself.u = usrp.sink_c(fusb_block_size=0, fusb_nblocks=0) self.u.set_interp_rate(512) self._tx_subdev_spec = usrp.pick_tx_subdevice(self.u) self.subdev = usrp.selected_subdev(self.u, self._tx_subdev_spec)self.u.tune(self.subdev._which, self.subdev, 2.45e9)self.subdev.set_gain(200) self.subdev.set_auto_tr(True) # ##self.connect(src, self.v_snk)self.run() v_src = gr.vector_source_c(self.v_snk.data()) self.connect(v_src, self.u) self.run()
Why don't you just do: self.connect(src, self.u) Instead of all the vector stuff in the middle? Tom _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
