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From: | matteo zunino |
Subject: | RE: [Discuss-gnuradio] Benchmark_ofdm_tx Benchmark_ofdm_rx |
Date: | Tue, 1 Jul 2008 17:17:06 +0200 |
> Date: Tue, 1 Jul 2008 08:05:55 -0700 > From: address@hidden > To: address@hidden > CC: address@hidden > Subject: Re: [Discuss-gnuradio] Benchmark_ofdm_tx Benchmark_ofdm_rx > > On Tue, Jul 01, 2008 at 04:54:22PM +0200, matteo zunino wrote: > > > On Tue, Jul 01, 2008 at 11:37:22AM +0200, matteo zunino wrote: > > > > > > > > Hi, > > > > > > > > i've a question about these two functions. My aim is to modify these > > > > benchmarks in order to create a trasmission system that can choose > > > > to put on a single carrier a BPSK or a QPSK modulation. My problem > > > > is this one, how can i comunicate to the receiver what carriers are > > > > BPSk adn what QPSK? > > > > > > > > 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 ;) > > > > > > Eric > > > I've seen it ;) 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. Excuse me for the continue questions but i've not such a big experience in Gnuradio. Where i i would modify gr_ofdm_frame_sink.cc in order to arrive to my aim? I don't know c++ language very well and i don't know where i can find it in this function Thanks a lot Matteo Live Search Maps Vorresti un pub diverso dal solito? Cercalo con Live Search Maps! |
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