Benchmark_tx/rx with audio input and output

GNU Radio
1

Hi

I wanted to do the benchmark tx and rx with Audio instead of the USRP.
I made all the changes to the transmitter and the receiver. The
transmitter
works fine but the receiver hangs!!

I do the upconversion on transmitter after modulating, and transmit. and
do
the downconversion on receiver side before demodulating.

Upconversion : I multiply by a sine wave
Downconversion : I multiply by both sine and cos, (which make I and Q)
and
use a float_to_complex to make them into one complex stream.

I set the converter rate = sample rate = 18000
frequency = 250 Hz
interp_deci_rate = 200
Bit rate comes to 45 when samples_per_symbol = 2

I guess the hanging is at the delete_head() stage of the pkt.py! That
just
means the packets received are not in proper format! Wr can i possibly
be
going wrong? I am stuck here and any suggestion will be of great help!

Thank u

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2

On Mon, Aug 24, 2009 at 11:29:10AM -0700, udadidd wrote:

Upconversion : I multiply by a sine wave
going wrong? I am stuck here and any suggestion will be of great help!

Thank u

When we’re debugging new code, we generally log the intermediate
results to files using gr.file_sink, then look at the resulting data
using some combination of octave, maplotlib, and/or scipy.

Eric