Eric:
The DRM spec allows operation at 5, 10 and 20 kHz spacing in all digital
mode. In the 5 and 10 kHz modes, the bit rate ranges from 7.6 to 26.6 kb/s.
That's nowhere near the IBOC rates, so let's consider the 20 kHz case: the
range is 16.3 kb/s to 55 kb/s.
In all-digital IBOC, subcarriers extend to =/- 9447.7 Hz from the carrier.
The bandwidth is therefore 18.894 kHz. The bit rate is 40.4 kb/s.
They both use 64QAM and 16QAM modulation which is the predominating factor
in throughput hence
Now show me your numbers to justify saying that all-digital IBOC is more of
a frequency hog than all-digital DRM. Please, let's not de-focus the
discussion with comparisons to analog, whether it can operate below 1 GHz,
etc.
Chuck
Date: Mon, 2 Feb 2004 23:28:17 EST
From: N0UIHEric@aol.com
Subject: Re: [IRCA] IBOC
Chuck, this is where you're wrong. IBOC, no matter whether it's digital only
or a hybrid, is a FREQUENCY HOG. Analog AM sounds FAR BETTER and HAS FAR
MORE
COVERAGE than the low-quality IBOC sound. DRM is not as much of a frequency
hog, but frequencies below 1 GHz are NOT SUITED for digital radio.
73 and good DX from Eric
Amateur Radio Station N0UIH
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