From alopez@mit.edu Sat Oct 01 16:25:39 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!mit!alopez From: alopez@mit.edu (Anton López) Newsgroups: comp.dsp Subject: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Oct01.162539.4276@mit.edu> Date: Sat, 01 Oct 1994 16:25:39 GMT Organization: Massachusetts Institute of Technology NNTP-Posting-Host: mit.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 11 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 payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. When all 14 rows are assembled, the matrix forms an 80-column ASCII status report. -- Anton López *PLONK* filter active for trolls. Sun 3/60 (SunOS 4.1.1) - NetBSD 1.0 From mnovak@titech.ac.jp Sat Oct 01 22:36:39 1994 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!titech!mnovak From: mnovak@titech.ac.jp (Mike Novak) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Oct01.223639.7682@titech.ac.jp> Date: Sat, 01 Oct 1994 22:36:39 GMT References: <1994Oct01.162539.4276@mit.edu> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 11 In article <1994Oct01.162539.4276@mit.edu>, alopez@mit.edu (Anton López) 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'. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! PGP Public key available via finger or upon request. -- Mike Novak -- Tokyo Institute of Technology Computer Centre "Row 14. No joke." From tcampbell@stanford.edu Mon Oct 03 02:05:39 1994 Path: ashpoly!cascade!transat!eunet-de!hansebox!stanford!tcampbell From: tcampbell@stanford.edu (Takeshi Campbell) Newsgroups: comp.dsp Subject: Re: Observation: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Oct03.020539.5382@stanford.edu> Date: Mon, 03 Oct 1994 02:05:39 GMT References: <1994Oct01.162539.4276@mit.edu> <1994Oct01.223639.7682@titech.ac.jp> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: Netscape 1.1N Lines: 10 In article <1994Oct01.223639.7682@titech.ac.jp>, mnovak@titech.ac.jp (Mike Novak) writes: > A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! > PGP Public key available via finger or upon request. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Takeshi Campbell *PLONK* filter active for trolls. Atari Falcon 030 - NetBSD 1.0