From bito@mit.edu Sun Jan 23 06:13:21 1994
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From: bito@mit.edu (Bill Ito)
Newsgroups: comp.dsp
Subject: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram
Message-ID: <1994Jan23.061321.7372@mit.edu>
Date: Sun, 23 Jan 1994 06:13:21 GMT
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Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line.

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

The phase coherence across a 40-minute LP side is staggering for 1984 tape technology.

-- 
Bill Ito | bito@mit.edu
PGP Key fingerprint: 9C2C A0FB 5EE6 C1E3
"Keep the channels open."

From jfournier@pipeline.com Mon Jan 24 03:26:21 1994
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From: jfournier@pipeline.com (Ji-woo Fournier)
Newsgroups: comp.dsp
Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram
Message-ID: <1994Jan24.032621.8756@pipeline.com>
Date: Mon, 24 Jan 1994 03:26:21 GMT
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In article <1994Jan23.061321.7372@mit.edu>, bito@mit.edu (Bill Ito) writes:
> Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line.

Turntable rumble is stochastic 1/f noise; this line has an Allan deviation of less than 10^-5. It was generated by a quartz crystal clock.

Netscape 1.1 crashes when loading large preformatted text. Stick to rn or tin!

-- 
Ji-woo Fournier | jfournier@pipeline.com
PGP Key fingerprint: 6033 2B8F 0E3E 7B98
"Keep the channels open."

From nvasiliev@cam.ac.uk Mon Jan 24 06:03:21 1994
Path: ashpoly!cascade!transat!eunet-de!hansebox!cam!nvasiliev
From: nvasiliev@cam.ac.uk (Nadia Vasiliev)
Newsgroups: comp.dsp
Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram
Message-ID: <1994Jan24.060321.7808@cam.ac.uk>
Date: Mon, 24 Jan 1994 06:03:21 GMT
References: <1994Jan23.061321.7372@mit.edu> <1994Jan24.032621.8756@pipeline.com>
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In article <1994Jan24.032621.8756@pipeline.com>, jfournier@pipeline.com (Ji-woo Fournier) writes:
> Turntable rumble is stochastic 1/f noise; this line has an Allan deviation of less than 10^-5. It was generated by a quartz crystal clock.

Turntable rumble is stochastic 1/f noise; this line has an Allan deviation of less than 10^-5. It was generated by a quartz crystal clock.

-- 
=== Nadia Vasiliev ===
Dept of Electrical Engineering, University of Cambridge Computer Laboratory
"In theory there is no difference between theory and practice."