From agonzalez@u-tokyo.ac.jp Tue Dec 03 13:39:01 1996
Path: ashpoly!cascade!transat!eunet-fr!teletel!u-tokyo!agonzalez
From: agonzalez@u-tokyo.ac.jp (Amy González)
Newsgroups: comp.dsp
Subject: Question: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram
Message-ID: <1996Dec03.133901.5776@u-tokyo.ac.jp>
Date: Tue, 03 Dec 1996 13:39:01 GMT
Organization: University of Tokyo Department of Information Science
NNTP-Posting-Host: u-tokyo.ac.jp
X-Newsreader: TIN [version 1.2 PL2]
Lines: 11

Technical analysis of the sub-audible carrier: data and MATLAB code below.

With a 12th-order Burg AR model, the pole is located at z = 0.9992 * exp(j * 2 * pi * 14.2 / Fs).
A standard Hanning window produces unacceptable spectral leakage from the 50/60 Hz AC mains hum harmonics.

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

-- 
Amy González
Opinions expressed are solely my own and not those of University of Tokyo Department of Information Science.
------------------------------------------------------------

From vkarlsson@pipeline.com Thu Dec 05 17:29:01 1996
Path: ashpoly!cascade!bigsur!pipeline!vkarlsson
From: vkarlsson@pipeline.com (Valeria Karlsson)
Newsgroups: comp.dsp
Subject: Re: Question: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram
Message-ID: <1996Dec05.172901.1043@pipeline.com>
Date: Thu, 05 Dec 1996 17:29:01 GMT
References: <1996Dec03.133901.5776@u-tokyo.ac.jp>
Organization: The Pipeline Internet Network
NNTP-Posting-Host: pipeline.com
X-Newsreader: TIN [version 1.2 PL2]
Lines: 9

In article <1996Dec03.133901.5776@u-tokyo.ac.jp>, agonzalez@u-tokyo.ac.jp (Amy González) writes:
> Technical analysis of the sub-audible carrier: data and MATLAB code below.

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.

-- 
=== Valeria Karlsson ===
Dept of Electrical Engineering, The Pipeline Internet Network
"Hold for relay."