|
From: | Marcus D. Leech |
Subject: | Re: [Discuss-gnuradio] Signal coming from the USRP to the computer |
Date: | Sun, 29 May 2011 17:11:51 -0400 |
User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.17) Gecko/20110428 Fedora/3.1.10-1.fc14 Thunderbird/3.1.10 |
On 05/29/2011 04:50 PM, John Andrews wrote:
Hi All,I want to know what is the signal coming from the USRP onto the USB bus. I know that the received signal is a baseband signal and assuming complex sampling (I have RFX2400 daughterboards) each complex sample that enters the USB bus is the following,x[i] = (inphase_component) + j (quadrature_component), andx[i] = m(t)cos( 2*pi*FREQ_OFFSET*t + PHI ) + jm(t)sin( 2*pi*FREQ_OFFSET*t + PHI ), where m(t), is the actual message signal, FREQ_OFFSET is the frequency offset, and PHI is the phase.Is that correct? Thanks
More or less, yes.There will be random noise components as well, since this is "real world", rather than purely a Matlab simulation :-)
-- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org
[Prev in Thread] | Current Thread | [Next in Thread] |