|
From: | Marcus D. Leech |
Subject: | Re: [Discuss-gnuradio] problems with benchmark_ofdm and N210 |
Date: | Wed, 08 Jun 2011 22:20:37 -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 06/08/2011 09:51 PM, Morgan Redfield wrote:
If you're doing these tests over-the-air, is it possible that there's a signal on TV channel 44 around you?Ok. I found another problem in my code. The transmit_path has a multiplier in it that was set to 200 (it could go up to 32768). This was for the original USRP, but I think UHD needs a signal with magnitude<=1. It seems like the signal was probably clipping. I changed the magnitude of the multiplier and fiddled with the gain parameters a bit. I'm now able to get the standard boxcar that I expect for OFDM. There's still a spike at the center frequency though, I don't see a gap. Thanks, Morgan
Channel 44 starts at 650MHz. -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org
[Prev in Thread] | Current Thread | [Next in Thread] |