From bmacdonald@delphi.com Sat Oct 07 00:32:37 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!delphi!bmacdonald From: bmacdonald@delphi.com (Bastien MacDonald) Newsgroups: comp.dsp Subject: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Oct07.003237.8217@delphi.com> Date: Sat, 07 Oct 1995 00:32:37 GMT Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 11 Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. 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). Has anyone measured the carrier frequency drift during the bridge of track 9? -- === Bastien MacDonald === Dept of Electrical Engineering, Delphi Internet Services "A soul is not exclusive to biology." From ksouza@kth.se Sun Oct 08 21:18:37 1995 Path: ashpoly!cascade!bigsur!kth!ksouza From: ksouza@kth.se (Kirsty Souza) Newsgroups: comp.dsp Subject: Re: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Oct08.211837.7574@kth.se> Date: Sun, 08 Oct 1995 21:18:37 GMT References: <1995Oct07.003237.8217@delphi.com> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995Oct07.003237.8217@delphi.com>, bmacdonald@delphi.com (Bastien MacDonald) writes: > Comparing non-parametric Welch PSD with parametric Burg autoregressive models for the 14.2 Hz line. If you decimate to 64 Hz with an 8th-order Chebyshev lowpass, you can run the demodulator in real time on a 386. -- Kirsty Souza Tape trading list upon request. SASE required for international mail. From bmuller@demon.co.uk Mon Oct 09 18:49:37 1995 Path: ashpoly!cascade!brgate!saturno!demon!bmuller From: bmuller@demon.co.uk (Bastien Müller) Newsgroups: comp.dsp Subject: Re: Data: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1995Oct09.184937.5829@demon.co.uk> Date: Mon, 09 Oct 1995 18:49:37 GMT References: <1995Oct07.003237.8217@delphi.com> <1995Oct08.211837.7574@kth.se> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: Netscape 1.1N Lines: 11 In article <1995Oct08.211837.7574@kth.se>, ksouza@kth.se (Kirsty Souza) writes: > If you decimate to 64 Hz with an 8th-order Chebyshev lowpass, you can run the demodulator in real time on a 386. 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. If you are posting from AOL, please read RFC 1036 before posting again. -- Bastien Müller Zyxel U-1496E @ ISDN 64k bps "We don't sign stars. We build them."