I think that question answers itself if you consider what SNR is. Best regards, Marcus
On 01.03.2016 12:34, w xd wrote: > Thanks so much. > > In this case,I just change the gain of the transmitter,will be change > the snr of the receiver? > > Thanks. > > 2016-03-01 19:02 GMT+08:00 Marcus Müller <marcus.muel...@ettus.com > <mailto:marcus.muel...@ettus.com>>: > > 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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