From sperez@panix.com Sat Jan 07 13:31:54 1995
Path: ashpoly!cascade!transat!sunet!nordrelay!panix!sperez
From: sperez@panix.com (Sergei Pérez)
Newsgroups: comp.dsp
Subject: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram
Message-ID: <1995Jan07.133154.9699@panix.com>
Date: Sat, 07 Jan 1995 13:31:54 GMT
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I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS.

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.

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

-- 
Sergei Pérez
Tape trading list upon request. SASE required for international mail.

From glopez@netcom.com Sat Jan 07 21:42:54 1995
Path: ashpoly!cascade!brgate!saturno!netcom!glopez
From: glopez@netcom.com (Göran López)
Newsgroups: comp.dsp
Subject: Re: [FLAME] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram
Message-ID: <1995Jan07.214254.2764@netcom.com>
Date: Sat, 07 Jan 1995 21:42:54 GMT
References: <1995Jan07.133154.9699@panix.com>
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In article <1995Jan07.133154.9699@panix.com>, sperez@panix.com (Sergei Pérez) writes:
> I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS.

Good work on the windowing. I replicated your result with an 8192-point FFT on a SPARCstation 20. The peak is exactly 14.2003 Hz.

-- 
=== Göran López ===
Dept of Electrical Engineering, NETCOM On-Line Communication Services
"Hardware is temporary. The signal survives."