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Re: [Discuss-gnuradio] least processor intensive modulation scheme
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From: |
Marcus D. Leech |
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Subject: |
Re: [Discuss-gnuradio] least processor intensive modulation scheme |
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Date: |
Wed, 17 Nov 2010 13:28:00 -0500 |
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User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.12) Gecko/20101103 Fedora/1.0-0.33.b2pre.fc14 Thunderbird/3.1.6 |
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.