Re: [Discuss-gnuradio] IEEE 802.11 Transceiver Module - Timing offset at receiver side

On 06/04/2017 06:07 PM, Qurat-Ul-Ann Akbar wrote: It does detect the correlation and start of frames in sync_Short block but data is not decoded probably because of high noise. If there are no overruns and your SNR is so incredibly bad that you cannot even detect the autocorrelation at the

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Hi all, tx_ofdm.grc Description: Binary data I was trying out tx_ofdm.grc (flow graph that comes with the OFDM examples in Gnuradio).Specifically, I am trying to transfer a picture of a cat from a file source and see whether it gets transmitted correctly.However I noticed that some bytes (exactly

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Re: [Discuss-gnuradio] IEEE 802.11 Transceiver Module - Timing offset at receiver side

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

Re: [Discuss-gnuradio] IEEE 802.11 Transceiver Module - Timing offset at receiver side

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 ? On Jun 4, 2017 11:13 AM, "Bastian Bloessl" wrote: > Hi, > > > On 06/04/2017 04:25 PM, Qurat-Ul-Ann

Re: [Discuss-gnuradio] IEEE 802.11 Transceiver Module - Timing offset at receiver side

I have been doing this for a long time now and I have changed all these parameters that you just mentioned in order to understand whats going on. I have changed both the transmitter and receiver gain and set different values but gain is not changing the SNR for some reason. It only works till 2.5

[Discuss-gnuradio] [GSoC 2017] gr-sigmf: Weekly update

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Re: [Discuss-gnuradio] IEEE 802.11 Transceiver Module - Timing offset at receiver side

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.

Re: [Discuss-gnuradio] IEEE 802.11 Transceiver Module - Timing offset at receiver side

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

Re: [Discuss-gnuradio] IEEE 802.11 Transceiver Module - Timing offset at receiver side

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.

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Re: [Discuss-gnuradio] IEEE 802.11 Transceiver Module - Timing offset at receiver side

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

Re: [Discuss-gnuradio] IEEE 802.11 Transceiver Module - Timing offset at receiver side

On 06/04/2017 05:35 PM, Qurat-Ul-Ann Akbar wrote: 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. This can have many reasons (including gain, interference, DC offsets, LO leakage, etc

[Discuss-gnuradio] Do embedded python blocks in grc allow for different output than input?

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