Then what could be the problem for a low SNR. The average power I see at the receiver is -100 to -120 db and the signal is too distorted within noise.
And I watched your video on YouTube in which you were showing a demo of the WiFi receiver. In that video you had big antennas and I don't think those were Vert 2450. On Jun 4, 2017 11:21 AM, "Bastian Bloessl" <m...@bastibl.net> wrote: > > > On 06/04/2017 05:16 PM, Qurat-Ul-Ann Akbar wrote: > >> I understand. But you didnt connect them directly to the USRP. You used >> some cable to connect the two and had a stand for your antenna. Can you >> tell me which cable was that ? >> > > I have no idea what you are talking about. When I used the Vert antennas, > I connected them directly to the USRP. > > If you experience low SNR you'll probably not improve things if you add > cables between the SDR and the antenna. I doubt that the antenna or cables > are your problem. > > Best, > Bastian > > > > >> On Jun 4, 2017 11:13 AM, "Bastian Bloessl" <m...@bastibl.net <mailto: >> m...@bastibl.net>> wrote: >> >> Hi, >> >> >> On 06/04/2017 04:25 PM, Qurat-Ul-Ann Akbar wrote: >> >> Thank you for the explanation. Can you tell me which antennas >> did you use for your experiments when you wrote your paper? >> Because I think a major problem with my receiver is a very low >> SNR because everything works fine with simulations. Currently I >> am using Vert 2450 antenna with my USRP N210. >> >> >> I used the same setup with the Vert 2450 antennas. >> >> Best, >> Bastian >> >> >> >> >> >> >> On Sun, Jun 4, 2017 at 12:33 PM, Bastian Bloessl >> <m...@bastibl.net <mailto:m...@bastibl.net> >> <mailto:m...@bastibl.net <mailto:m...@bastibl.net>>> wrote: >> >> Hi, >> >> On 6/3/2017 9:11 PM, Qurat-Ul-Ann Akbar wrote: >> >> Hello, >> >> How is the timing offset being handled in the 802.11 >> module. I >> see that the sync_long block does frequency offset >> correction >> and the frame_equalizer block does the phase correction >> but I >> dont understand where is the timing offset being >> handled. Can >> anyone tell me which algorithm is being used to do that? >> >> >> The Sync Long block correlates the signal with the known >> pattern of >> the long preamble to derive how the FFTs have to be aligned >> in time. >> >> Best, >> Bastian >> >> > -- > Dipl.-Inform. Bastian Bloessl > CONNECT Center > Trinity College Dublin > > GitHub/Twitter: @bastibl > https://www.bastibl.net/ >
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