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Re: [Discuss-gnuradio] Demodulating APCO P25 signals
From: |
Johnathan Corgan |
Subject: |
Re: [Discuss-gnuradio] Demodulating APCO P25 signals |
Date: |
Tue, 19 Feb 2008 11:47:10 -0800 |
On 2/19/08, Tom Rondeau <address@hidden> wrote:
> The idea here is to minimize the phase
> transition between successive symbols so the maximum is +135 degrees
> instead of +180. It's a minor change in the modulator that helps lower
> the bandwidth of the signal.
This prevents the passband envelope from passing through zero
amplitude, and allows the transmitter PA more leeway in terms of
linearity and spectral regrowth.
--
Johnathan Corgan
Corgan Enterprises LLC
http://corganenterprises.com/