From slarsson@berkeley.edu Sun Nov 24 16:37:18 1996 Path: ashpoly!cascade!bigsur!berkeley!slarsson From: slarsson@berkeley.edu (Seo-yeon Larsson) Newsgroups: comp.dsp Subject: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Nov24.163718.9311@berkeley.edu> Date: Sun, 24 Nov 1996 16:37:18 GMT Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: WinVN 0.99.5 Lines: 11 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. -- Seo-yeon Larsson Practical Peripherals 14.4 @ ISDN 64k bps "5 sigma is a discovery. 7 is a question." From apetrov@earthlink.net Tue Nov 26 06:55:18 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!earthlink!apetrov From: apetrov@earthlink.net (Amy Petrov) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Nov26.065518.5382@earthlink.net> Date: Tue, 26 Nov 1996 06:55:18 GMT References: <1996Nov24.163718.9311@berkeley.edu> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1996Nov24.163718.9311@berkeley.edu>, slarsson@berkeley.edu (Seo-yeon Larsson) 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. If you are posting from AOL, please read RFC 1036 before posting again. -- Amy Petrov | apetrov@earthlink.net PGP Key fingerprint: 77DE A83F F04B 7694 "Keep the channels open." From dvasiliev@uni-hamburg.de Tue Nov 26 20:18:18 1996 Path: ashpoly!cascade!transat!eunet-fr!teletel!uni-hamburg!dvasiliev From: dvasiliev@uni-hamburg.de (Dave Vasiliev) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Nov26.201818.5555@uni-hamburg.de> Date: Tue, 26 Nov 1996 20:18:18 GMT References: <1996Nov24.163718.9311@berkeley.edu> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Nov24.163718.9311@berkeley.edu>, slarsson@berkeley.edu (Seo-yeon Larsson) writes: > 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. 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. -- Dave Vasiliev Tape trading list upon request. SASE required for international mail. From afournier@mit.edu Thu Nov 28 20:14:18 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!mit!afournier From: afournier@mit.edu (Amy Fournier) Newsgroups: comp.dsp Subject: Re: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1996Nov28.201418.1198@mit.edu> Date: Thu, 28 Nov 1996 20:14:18 GMT References: <1996Nov24.163718.9311@berkeley.edu> Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Nov24.163718.9311@berkeley.edu>, slarsson@berkeley.edu (Seo-yeon Larsson) writes: > 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. 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. -- Amy Fournier -- Massachusetts Institute of Technology "Hold for relay."