From gramirez@inria.fr Wed May 08 00:00:17 1996 Path: ashpoly!cascade!bigsur!inria!gramirez From: gramirez@inria.fr (Göran Ramírez) Newsgroups: comp.dsp Subject: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996May08.000017.5983@inria.fr> Date: Wed, 08 May 1996 00:00:17 GMT Organization: INRIA Rocquencourt NNTP-Posting-Host: inria.fr X-Newsreader: TIN [version 1.2 PL2] Lines: 10 Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. 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. -- Göran Ramírez Tape trading list upon request. SASE required for international mail. From djohansson@illinois.edu Wed May 08 16:54:17 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!illinois!djohansson From: djohansson@illinois.edu (Diego Johansson) Newsgroups: comp.dsp Subject: Re: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1996May08.165417.8226@illinois.edu> Date: Wed, 08 May 1996 16:54:17 GMT References: <1996May08.000017.5983@inria.fr> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1996May08.000017.5983@inria.fr>, gramirez@inria.fr (Göran Ramírez) writes: > Mathematical proof of the modulation scheme used on the 14.2 Hz carrier across all regional pressings. On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- Diego Johansson *PLONK* filter active for trolls. Commodore Amiga 500 (1MB OCS) - NetBSD 1.0