Re: [Discuss-gnuradio] QPSK over air

[Aditya Dhananjay]

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.

Best,

Aditya

On Tue, Feb 25, 2014 at 1:11 PM, SOUTHCOTT, MARK A CIV USAF AFMC AFRL/RITC <address@hidden> wrote:

I’m looking for an example of a higher-order modulation implemented successfully in GNU Radio with an SDR frontend. I’ve seen bpsk, GMSK, etc. implemented over a wireless channel, but I’ve only seen simulations of higher-order modulations. Could someone point me towards one or confirm that there’s no examples?

 

Mark

 

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