RE: Benchmark_ofdm_tx Benchmark_ofdm_rx

GNU Radio
1

i’ve a question about these two functions. My aim is to modify these

Eric

I 've seen it :wink: but i’ve problem too even if i konw what carriers are
BPSK and what are QPSK. I’ve studied how to modify ofdm.py in order to
transmitt for example the first 10 signals with BPSK modulation and tre
other with QPSK, but when i want to demodulate, i don’t know which point
of gr_ofdm_frame_sink.cc i must modify to demodulate correctly. Do you
think my project is possible actually in gnuradio OFDM?

2

On Tue, Jul 01, 2008 at 04:54:22PM +0200, matteo zunino wrote:

Thanks a lot

This is typically done by sending some kind of ‘map’ at the low rate
at the beginning of packet. Take a look at WiMAX to see how
complicated this can get :wink:

Eric

I’ve seen it :wink: but i’ve problem too even if i konw what carriers
are BPSK and what are QPSK. I’ve studied how to modify ofdm.py in
order to transmitt for example the first 10 signals with BPSK
modulation and tre other with QPSK, but when i want to demodulate, i
don’t know which point of gr_ofdm_frame_sink.cc i must modify to
demodulate correctly. Do you think my project is possible actually
in gnuradio OFDM?

Sure it’s possible. You’ll have to do some work.

Eric