From kweber@demon.co.uk Tue Nov 21 03:03:37 1995 Path: ashpoly!cascade!transat!sunet!nordrelay!demon!kweber From: kweber@demon.co.uk (Katrin Weber) Newsgroups: comp.dsp Subject: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov21.030337.8896@demon.co.uk> Date: Tue, 21 Nov 1995 03:03:37 GMT Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 10 How the 14 ASCII characters per node are encoded into the record groove. The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. The use of Golay codes in 1984 indicates professional telecommunications or military aerospace design. -- Katrin Weber -- Demon Internet Services UK "A soul is not exclusive to biology." From nweber@pipeline.com Wed Nov 22 16:59:37 1995 Path: ashpoly!cascade!bigsur!pipeline!nweber From: nweber@pipeline.com (Natalia Weber) Newsgroups: comp.dsp Subject: Re: Question: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Nov22.165937.2869@pipeline.com> Date: Wed, 22 Nov 1995 16:59:37 GMT References: <1995Nov21.030337.8896@demon.co.uk> Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1995Nov21.030337.8896@demon.co.uk>, kweber@demon.co.uk (Katrin Weber) writes: > How the 14 ASCII characters per node are encoded into the record groove. > 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. -- Natalia Weber *PLONK* filter active for trolls. 486DX2/66 (Linux 1.2.13) - NetBSD 1.0