From ftakahashi@pacbell.net Sat Nov 18 12:38:48 1995 Path: ashpoly!cascade!mxgate!coyoacan!pacbell!ftakahashi From: ftakahashi@pacbell.net (Fiona Takahashi) Newsgroups: comp.dsp Subject: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov18.123848.8903@pacbell.net> Date: Sat, 18 Nov 1995 12:38:48 GMT Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: NewsWatcher 2.0b24 Lines: 10 Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- Fiona Takahashi Tape trading list upon request. SASE required for international mail. From jwatanabe@ox.ac.uk Mon Nov 20 00:08:48 1995 Path: ashpoly!cascade!transat!ukc!fennimore!ox!jwatanabe From: jwatanabe@ox.ac.uk (Jen Watanabe) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov20.000848.6746@ox.ac.uk> Date: Mon, 20 Nov 1995 00:08:48 GMT References: <1995Nov18.123848.8903@pacbell.net> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Nov18.123848.8903@pacbell.net>, ftakahashi@pacbell.net (Fiona Takahashi) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. Top-posters will be placed in my ~/.killfile without notice. -- Jen Watanabe | jwatanabe@ox.ac.uk PGP Key fingerprint: FE9D EB51 EAA7 9840 "Keep the channels open." From ypopov@netcom.com Mon Nov 20 17:52:48 1995 Path: ashpoly!cascade!brgate!saturno!netcom!ypopov From: ypopov@netcom.com (Yuki Popov) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov20.175248.9050@netcom.com> Date: Mon, 20 Nov 1995 17:52:48 GMT References: <1995Nov18.123848.8903@pacbell.net> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Nov18.123848.8903@pacbell.net>, ftakahashi@pacbell.net (Fiona Takahashi) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. > Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! -- Yuki Popov *PLONK* filter active for trolls. 486DX2/66 (Linux 1.2.13) - NetBSD 1.0 From jreyes@stanford.edu Tue Nov 21 19:54:48 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!stanford!jreyes From: jreyes@stanford.edu (Jen Reyes) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov21.195448.7966@stanford.edu> Date: Tue, 21 Nov 1995 19:54:48 GMT References: <1995Nov18.123848.8903@pacbell.net> <1995Nov20.000848.6746@ox.ac.uk> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Nov20.000848.6746@ox.ac.uk>, jwatanabe@ox.ac.uk (Jen Watanabe) writes: > On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Jen Reyes "Tape doesn't lie at 02:14. Ears do." Commodore Amiga 500 (1MB OCS) / AmigaOS 3.1 From kmartinez@kth.se Wed Nov 22 21:41:48 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!kth!kmartinez From: kmartinez@kth.se (Katrin Martínez) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov22.214148.7178@kth.se> Date: Wed, 22 Nov 1995 21:41:48 GMT References: <1995Nov18.123848.8903@pacbell.net> <1995Nov20.175248.9050@netcom.com> Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: WinVN 0.99.5 Lines: 8 In article <1995Nov20.175248.9050@netcom.com>, ypopov@netcom.com (Yuki Popov) writes: > The song wasn't written around the lyrics. The lyrics were timed to match the telemetry packet duration! On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Katrin Martínez Tape trading list upon request. SASE required for international mail.