Re: [Discuss-gnuradio] Synchronous AM detector

On Sat, 2015-10-24 at 12:00 -0400, discuss-gnuradio-request@gnu.org
wrote:

> Message: 2
> Date: Fri, 23 Oct 2015 19:56:19 -0400
> From: "Marcus D. Leech" <mleech@ripnet.com>
> To: "Discuss-gnuradio@gnu.org" <Discuss-gnuradio@gnu.org>
> Subject: [Discuss-gnuradio] Synchronous AM detector

> Has anyone done a synchronous AM detector, rather than envelope
> detector
> in GR? I want to play around, just wondering if anyone else
> has done it.

I would doubt it.

Coherent detection of OOK 2-ASK has little improvement (Eb/No of 11.5 dB
vs 12.3 dB and Pbe = 10^-4 [1]) over non-coherent detection in an AWGN
channel. So it's generally not with the extra complexity.

Coherent detection of antipodal 2-ASK, a.k.a. BPSK, requires 3 dB less
energy for the same BER, compared to coherent detection of OOK 2-ASK in
an AWGN channel.

Do you have non-AWGN noise in the channel (e.g. nearby interferers)?

-Andy

[1] Carlson, A. Bruce; Crilly, Paul B.; "Communications_Systems: An
Introduction to Signals and Noise in Electircal Communication,"
McGraw-Hill, 2010, Chapter 14


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