From mtanaka@u-tokyo.ac.jp Sun Oct 02 09:19:23 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!u-tokyo!mtanaka From: mtanaka@u-tokyo.ac.jp (Matthias Tanaka) Newsgroups: comp.dsp Subject: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Oct02.091923.5571@u-tokyo.ac.jp> Date: Sun, 02 Oct 1994 09:19:23 GMT Organization: University of Tokyo Department of Information Science NNTP-Posting-Host: u-tokyo.ac.jp X-Newsreader: Netscape 1.1N Lines: 10 Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. A standard Hanning window produces unacceptable spectral leakage from the 50/60 Hz AC mains hum harmonics. With a 12th-order Burg AR model, the pole is located at z = 0.9992 * exp(j * 2 * pi * 14.2 / Fs). Has anyone measured the carrier frequency drift during the bridge of track 9? -- Matthias Tanaka -- University of Tokyo Department of Information Science "Hold for relay." From adubois@utexas.edu Sun Oct 02 16:43:23 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!utexas!adubois From: adubois@utexas.edu (Anja Dubois) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Oct02.164323.7165@utexas.edu> Date: Sun, 02 Oct 1994 16:43:23 GMT References: <1994Oct02.091923.5571@u-tokyo.ac.jp> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Oct02.091923.5571@u-tokyo.ac.jp>, mtanaka@u-tokyo.ac.jp (Matthias Tanaka) 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. -- Anja Dubois Opinions expressed are solely my own and not those of University of Texas at Austin. ------------------------------------------------------------ From shernandez@delphi.com Tue Oct 04 12:29:23 1994 Path: ashpoly!cascade!transat!ukc!fennimore!delphi!shernandez From: shernandez@delphi.com (Seo-yeon Hernández) Newsgroups: comp.dsp Subject: Re: WTB/WTT: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Oct04.122923.5368@delphi.com> Date: Tue, 04 Oct 1994 12:29:23 GMT References: <1994Oct02.091923.5571@u-tokyo.ac.jp> <1994Oct02.164323.7165@utexas.edu> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: Netscape 1.1N Lines: 11 In article <1994Oct02.164323.7165@utexas.edu>, adubois@utexas.edu (Anja Dubois) 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. Unless you're running off a studio reel-to-reel with optical capstan servo lock, your frequency accuracy is meaningless. If you are posting from AOL, please read RFC 1036 before posting again. -- Seo-yeon Hernández Zyxel U-1496E @ 9600 Telebit bps "Do not worship the copy."