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From: | Qurat-Ul-Ann Akbar |
Subject: | Re: [Discuss-gnuradio] IEEE 802.11 Transceiver Module - Timing offset at receiver side |
Date: | Sun, 4 Jun 2017 11:35:53 -0500 |
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" <address@hidden <mailto:address@hidden>> 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
<address@hidden <mailto:address@hidden>
<mailto:address@hidden <mailto:address@hidden>>> 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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