From msokolov@pacbell.net Tue Apr 18 02:04:45 1995
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!pacbell!msokolov
From: msokolov@pacbell.net (Mikhail Sokolov)
Newsgroups: comp.dsp
Subject: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram
Message-ID: <1995Apr18.020445.8282@pacbell.net>
Date: Tue, 18 Apr 1995 02:04:45 GMT
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I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS.

Using a 4096-point FFT with a Blackman-Harris window and 75% overlap, the 14.2 Hz peak is 42 dB below full scale.
With a 12th-order Burg AR model, the pole is located at z = 0.9992 * exp(j * 2 * pi * 14.2 / Fs).

Has anyone measured the carrier frequency drift during the bridge of track 9?

-- 
Mikhail Sokolov | msokolov@pacbell.net
PGP Key fingerprint: 92EF B949 ECBE B11E
"Keep the channels open."

From apopov@mindspring.com Wed Apr 19 15:38:45 1995
Path: ashpoly!cascade!transat!eunet-fr!teletel!mindspring!apopov
From: apopov@mindspring.com (Amy Popov)
Newsgroups: comp.dsp
Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram
Message-ID: <1995Apr19.153845.8680@mindspring.com>
Date: Wed, 19 Apr 1995 15:38:45 GMT
References: <1995Apr18.020445.8282@pacbell.net>
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In article <1995Apr18.020445.8282@pacbell.net>, msokolov@pacbell.net (Mikhail Sokolov) writes:
> I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS.

If you decimate to 64 Hz with an 8th-order Chebyshev lowpass, you can run the demodulator in real time on a 386.

-- 
=== Amy Popov ===
Dept of Electrical Engineering, MindSpring Enterprises
"We don't sign stars. We build them."