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Re: [Discuss-gnuradio] Correlation Estimator Over the Air
From: |
Richard Bell |
Subject: |
Re: [Discuss-gnuradio] Correlation Estimator Over the Air |
Date: |
Thu, 1 Oct 2015 10:44:59 +0200 |
Hi Logan,
Can you give more detail on your synchronization choices for BPSK so we can
tell you what more you may need to do?
Rich
Sent from my iPhone
> On Sep 30, 2015, at 7:14 PM, Washbourne, Logan <address@hidden> wrote:
>
> Hello,
>
> This is somewhat of an update to a previous post I made from last week. After
> talking to Julian and Martin, it was made clear to me that I needed to use a
> correlation system to insure my receiver would be synced up to my transmitter
> when trying to communicate over the air.
>
> I am trying to utilize the Correlation Estimator block to help me achieve
> those means. In order to ease myself into it, I am trying to turn the
> test_corr_est.grc example into an over the air program. I am getting
> communication between the transmitter and receiver(essentially I just split
> the grc program in two and took out the throttle block and the channel model
> and replaced them with UHD blocks). Now, I don't get any O's or L's or an
> abundance of U's, and I can clearly see data coming in on the RX side, but it
> seems to be a lot of noise, but noise generated by the TX side, because it
> goes away when I stop transmitting. The center frequency is 2.48GHz and the
> sample rate is 250k samples/sec.
>
> My testing method is plotting the constellation symbols right before they get
> sent out on the TX side and then plotting them right after the UHD block on
> the RX side. It is only bpsk and the symbols are covering all four quadrants.
>
> I haven't changed any settings on the polyphase clock sync or the modulation
> scheme.
>
> This is a little rambly but I appreciate your time,
>
> Logan Washbourne
> Electrical Engineering Graduate Student
> (Electromagnetics)
>
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- [Discuss-gnuradio] Correlation Estimator Over the Air, Washbourne, Logan, 2015/10/08
- Re: [Discuss-gnuradio] Correlation Estimator Over the Air,
Richard Bell <=
- Re: [Discuss-gnuradio] Correlation Estimator Over the Air, Washbourne, Logan, 2015/10/08
- Re: [Discuss-gnuradio] Correlation Estimator Over the Air, Richard Bell, 2015/10/08
- Re: [Discuss-gnuradio] Correlation Estimator Over the Air, lwashbo, 2015/10/08
- Re: [Discuss-gnuradio] Correlation Estimator Over the Air, Richard Bell, 2015/10/08
- Re: [Discuss-gnuradio] Correlation Estimator Over the Air, Washbourne, Logan, 2015/10/08
- Re: [Discuss-gnuradio] Correlation Estimator Over the Air, Richard Bell, 2015/10/08
- Re: [Discuss-gnuradio] Correlation Estimator Over the Air, Richard Bell, 2015/10/08
- Re: [Discuss-gnuradio] Correlation Estimator Over the Air, Washbourne, Logan, 2015/10/08
- Re: [Discuss-gnuradio] Correlation Estimator Over the Air, Richard Bell, 2015/10/08
- Re: [Discuss-gnuradio] Correlation Estimator Over the Air, Washbourne, Logan, 2015/10/12