From mkang@mindspring.com Thu Jun 16 00:48:49 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!mindspring!mkang From: mkang@mindspring.com (Mathieu Kang) Newsgroups: comp.dsp Subject: Question: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Jun16.004849.2930@mindspring.com> Date: Thu, 16 Jun 1994 00:48:49 GMT Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: Netscape 1.1N Lines: 11 I've been re-running spectral estimation on high-resolution 16-bit transfers of SYNTHESIS. 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? -- Mathieu Kang Zyxel U-1496E @ 14,400 bps "Measuring a record you own is listening, not piracy." From ljohansson@mindspring.com Thu Jun 16 12:05:49 1994 Path: ashpoly!cascade!brgate!saturno!mindspring!ljohansson From: ljohansson@mindspring.com (Lucia Johansson) Newsgroups: comp.dsp Subject: Re: Question: 14.2 Hz sub-carrier PSD estimation - Welch vs Burg periodogram Message-ID: <1994Jun16.120549.2483@mindspring.com> Date: Thu, 16 Jun 1994 12:05:49 GMT References: <1994Jun16.004849.2930@mindspring.com> Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1994Jun16.004849.2930@mindspring.com>, mkang@mindspring.com (Mathieu Kang) 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. -- Lucia Johansson US Robotics Courier V.34 @ ISDN 64k bps "Extraordinary claims require extraordinary spectra."