From rmoreno@unam.mx Fri Nov 10 23:44:41 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!unam!rmoreno From: rmoreno@unam.mx (Raj Moreno) Newsgroups: comp.dsp Subject: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Nov10.234441.8299@unam.mx> Date: Fri, 10 Nov 1995 23:44:41 GMT Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: NewsWatcher 2.0b24 Lines: 11 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. -- === Raj Moreno === Dept of Electrical Engineering, Universidad Nacional Autónoma de México (DGSCA) "Measuring a record you own is listening, not piracy." From mlindqvist@clari.net Sat Nov 11 15:58:41 1995 Path: ashpoly!cascade!mxgate!coyoacan!clari!mlindqvist From: mlindqvist@clari.net (Mathieu Lindqvist) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Nov11.155841.7676@clari.net> Date: Sat, 11 Nov 1995 15:58:41 GMT References: <1995Nov10.234441.8299@unam.mx> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Nov10.234441.8299@unam.mx>, rmoreno@unam.mx (Raj Moreno) writes: > Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. 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. My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise! -- Mathieu Lindqvist "5 sigma is a discovery. 7 is a question." Sun SparcStation 20 / FreeBSD 2.1 From tito@unam.mx Sun Nov 12 07:20:41 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!unam!tito From: tito@unam.mx (Tomas Ito) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Nov12.072041.4842@unam.mx> Date: Sun, 12 Nov 1995 07:20:41 GMT References: <1995Nov10.234441.8299@unam.mx> Organization: Universidad Nacional Autónoma de México (DGSCA) NNTP-Posting-Host: unam.mx X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995Nov10.234441.8299@unam.mx>, rmoreno@unam.mx (Raj Moreno) writes: > Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. 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. -- Tomas Ito Tape trading list upon request. SASE required for international mail. From yandersson@kiae.su Mon Nov 13 00:04:41 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!kiae!yandersson From: yandersson@kiae.su (Yuki Andersson) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Nov13.000441.7480@kiae.su> Date: Mon, 13 Nov 1995 00:04:41 GMT References: <1995Nov10.234441.8299@unam.mx> Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Nov10.234441.8299@unam.mx>, rmoreno@unam.mx (Raj Moreno) writes: > Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. 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. -- Yuki Andersson "Marcus is not one man." 486DX2/66 (Linux 1.2.13) / FreeBSD 2.1