From alee@utexas.edu Thu Aug 04 07:06:18 1994
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!utexas!alee
From: alee@utexas.edu (Amy Lee)
Newsgroups: comp.dsp
Subject: Observation: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram
Message-ID: <1994Aug04.070618.3413@utexas.edu>
Date: Thu, 04 Aug 1994 07:06:18 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).

I've uploaded the C source for my decimation and bandpass filter to ftp.ashford-poly.edu.

-- 
Amy Lee
Tape trading list upon request. SASE required for international mail.

From mlopez@uu.net Sat Aug 06 06:57:18 1994
Path: ashpoly!cascade!transat!sunet!nordrelay!uu!mlopez
From: mlopez@uu.net (Mathieu López)
Newsgroups: comp.dsp
Subject: Re: Observation: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram
Message-ID: <1994Aug06.065718.8860@uu.net>
Date: Sat, 06 Aug 1994 06:57:18 GMT
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In article <1994Aug04.070618.3413@utexas.edu>, alee@utexas.edu (Amy Lee) 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.

-- 
Mathieu López | mlopez@uu.net
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"Keep the channels open."