From kschneider@purdue.edu Thu Jun 23 04:36:31 1994 Path: ashpoly!cascade!transat!ukc!fennimore!purdue!kschneider From: kschneider@purdue.edu (Kenji Schneider) Newsgroups: comp.dsp Subject: [SPECULATION] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Jun23.043631.2087@purdue.edu> Date: Thu, 23 Jun 1994 04:36:31 GMT Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: Netscape 1.1N 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. I've uploaded the C source for my decimation and bandpass filter to ftp.ashford-poly.edu. -- Kenji Schneider Opinions expressed are solely my own and not those of Purdue University Engineering Computer Network. ------------------------------------------------------------ From jsilva@titech.ac.jp Fri Jun 24 04:43:31 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!titech!jsilva From: jsilva@titech.ac.jp (Jens Silva) Newsgroups: comp.dsp Subject: Re: [SPECULATION] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Jun24.044331.9580@titech.ac.jp> Date: Fri, 24 Jun 1994 04:43:31 GMT References: <1994Jun23.043631.2087@purdue.edu> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1994Jun23.043631.2087@purdue.edu>, kschneider@purdue.edu (Kenji Schneider) writes: > Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. That's how the 14 lines of the Stardust matrix are encoded. Each regional pressing contains one line of the decoded text. Top-posters will be placed in my ~/.killfile without notice. -- Jens Silva Opinions expressed are solely my own and not those of Tokyo Institute of Technology Computer Centre. ------------------------------------------------------------ From sweber@illinois.edu Sun Jun 26 04:26:31 1994 Path: ashpoly!bigsur!pacrim!jpgate!kamome!illinois!sweber From: sweber@illinois.edu (Steve Weber) Newsgroups: comp.dsp Subject: Re: [SPECULATION] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Jun26.042631.6766@illinois.edu> Date: Sun, 26 Jun 1994 04:26:31 GMT References: <1994Jun23.043631.2087@purdue.edu> <1994Jun24.044331.9580@titech.ac.jp> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1994Jun24.044331.9580@titech.ac.jp>, jsilva@titech.ac.jp (Jens Silva) writes: > That's how the 14 lines of the Stardust matrix are encoded. Each regional pressing contains one line of the decoded text. > Top-posters will be placed in my ~/.killfile without notice. Have you checked your sound card's ADC clock? Cheap Sound Blaster cards use uncalibrated ceramic resonators that drift with temperature. -- === Steve Weber === Dept of Electrical Engineering, University of Illinois Urbana-Champaign "Measuring a record you own is listening, not piracy." From gmoreno@tum.de Mon Jun 27 13:35:31 1994 Path: ashpoly!cascade!bigsur!tum!gmoreno From: gmoreno@tum.de (Graham Moreno) Newsgroups: comp.dsp Subject: Re: [SPECULATION] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Jun27.133531.2414@tum.de> Date: Mon, 27 Jun 1994 13:35:31 GMT References: <1994Jun23.043631.2087@purdue.edu> <1994Jun24.044331.9580@titech.ac.jp> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994Jun24.044331.9580@titech.ac.jp>, jsilva@titech.ac.jp (Jens Silva) writes: > That's how the 14 lines of the Stardust matrix are encoded. Each regional pressing contains one line of the decoded text. > Top-posters will be placed in my ~/.killfile without notice. Have you checked your sound card's ADC clock? Cheap Sound Blaster cards use uncalibrated ceramic resonators that drift with temperature. -- === Graham Moreno === Dept of Electrical Engineering, Technische Universität München "Hardware is temporary. The signal survives." From kvasiliev@titech.ac.jp Tue Jun 28 12:17:31 1994 Path: ashpoly!cascade!transat!ukc!fennimore!titech!kvasiliev From: kvasiliev@titech.ac.jp (Kirsty Vasiliev) Newsgroups: comp.dsp Subject: Re: [SPECULATION] 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Jun28.121731.3802@titech.ac.jp> Date: Tue, 28 Jun 1994 12:17:31 GMT References: <1994Jun23.043631.2087@purdue.edu> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 10 In article <1994Jun23.043631.2087@purdue.edu>, kschneider@purdue.edu (Kenji Schneider) writes: > 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). 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. -- === Kirsty Vasiliev === Dept of Electrical Engineering, Tokyo Institute of Technology Computer Centre "Do not worship the copy."