Dear zs, > I want to change the ratio of power of the received signal to power of the noise.
well, improving receiver SNR is the *core* problem of all wireless communication. Unless you just add noise (on the receiver or the transmitter side, depending on whether you want your noise to be channel-shaped or not), there's your whole digital communication knowledge you can apply (matched filtering, oversampling, coding gain, preselection filtering...). > And I want to change the gain of the transmitter. Well, then do that. The usrp_sink block has a TX gain setting, and all daughterboards (aside from the Basic*, LF* and TVRX* boards) have adjustable gain: use the set_tx_gain(gain) method, or if you're using GRC, look into the "RF settings" tab. Best regards, Marcus On 01.03.2016 09:56, w xd wrote: > Sorry for that. > > I'm now using the USRP N210,one transmitter and one receiver.I want to > change the ratio of power of the received signal to power of the > noise.And I want to change the gain of the transmitter. > > 2016-03-01 16:45 GMT+08:00 Marcus Müller <marcus.muel...@ettus.com > <mailto:marcus.muel...@ettus.com>>: > > Dear zs, > > your question is absolutely unclear. SNR of what? What instrument? > TX or RX, or simulation? > > Best regards, > Marcus > > > On 01.03.2016 07:06, w xd wrote: >> Hi, >> >> I want to change the SNR through gnuradio.Can I realize it by >> just change the gain of the gnuradio?Or the instrument is >> fixed,and the snr can't be change? >> >> Thanks so much. >> >> Best Regards, >> zs >> >> >> _______________________________________________ >> Discuss-gnuradio mailing list >> Discuss-gnuradio@gnu.org <mailto:Discuss-gnuradio@gnu.org> >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org <mailto:Discuss-gnuradio@gnu.org> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >
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