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Re: [Discuss-gnuradio] least processor intensive modulation scheme

From: Marcus D. Leech
Subject: Re: [Discuss-gnuradio] least processor intensive modulation scheme
Date: Wed, 17 Nov 2010 13:28:00 -0500
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On 11/17/2010 12:26 PM, William Cox wrote:
I guess it'd be nice if there was a way to compare spectral efficiency vs. processing power. In terms of complex modulation schemes, which would be least intensive? QAM, QPSK, GMSK?
Consult a modern signal processing book.

I ask because I'm trying to use an Atom-based system for running GNURadio and I'd like to minimize the overhead as much as possible. I've been using GMSK so far, but I got to wondering if I could save any appreciable amount by switching to an "easier" modulation scheme.

For low-bit-rate stuff, OOK works fairly well, but it isn't particularly spectrally efficient, and it's a bugger to correctly demodulate in
  low-SNR situations AFAIK.

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