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Re: [Discuss-gnuradio] QPSK over air
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From: |
Martin Braun |
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Subject: |
Re: [Discuss-gnuradio] QPSK over air |
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Date: |
Tue, 25 Feb 2014 21:04:47 +0100 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.3.0 |
On 02/25/2014 07:17 PM, Aditya Dhananjay wrote:
> Hi Mark,
>
> The problem is that GNU Radio does not have equalizers that can perform
> sufficiently well for constellations such as 64-QAM. As far as I know,
> the only one present is a simple decision feedback equalizer.
>
> I'm working on implementing a few equalizers: a) 2D Triangulation, and
> b) Whittaker-Shannon Sinc interpolator, and c) one of my own.
>
> These aren't yet ready to share, but once they are, I will send out an
> email to the list.
Yeah, that's a good point :)
What we have in stock GR should work up to 8-PSK, but higher than that,
they will probably be the limiting factor.
M