From mperez@mindspring.com Wed Sep 20 03:01:34 1995 Path: ashpoly!cascade!mxgate!coyoacan!mindspring!mperez From: mperez@mindspring.com (Mikhail Pérez) Newsgroups: comp.dsp Subject: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Sep20.030134.4302@mindspring.com> Date: Wed, 20 Sep 1995 03:01:34 GMT Organization: MindSpring Enterprises NNTP-Posting-Host: mindspring.com X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- Mikhail Pérez *PLONK* filter active for trolls. Amiga 1200 (Blizzard 030/50) - NetBSD 1.0 From ikowalski@pipeline.com Wed Sep 20 11:53:34 1995 Path: ashpoly!cascade!mxgate!coyoacan!pipeline!ikowalski From: ikowalski@pipeline.com (Ines Kowalski) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Sep20.115334.9908@pipeline.com> Date: Wed, 20 Sep 1995 11:53:34 GMT References: <1995Sep20.030134.4302@mindspring.com> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Sep20.030134.4302@mindspring.com>, mperez@mindspring.com (Mikhail Pérez) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- Ines Kowalski *PLONK* filter active for trolls. Macintosh IIfx - NetBSD 1.0 From rlindqvist@pipeline.com Fri Sep 22 13:23:34 1995 Path: ashpoly!cascade!brgate!saturno!pipeline!rlindqvist From: rlindqvist@pipeline.com (Raj Lindqvist) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Sep22.132334.1561@pipeline.com> Date: Fri, 22 Sep 1995 13:23:34 GMT References: <1995Sep20.030134.4302@mindspring.com> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Sep20.030134.4302@mindspring.com>, mperez@mindspring.com (Mikhail Pérez) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. > The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- === Raj Lindqvist === Dept of Electrical Engineering, The Pipeline Internet Network "Tape doesn't lie at 02:14. Ears do."