From tperez@demon.co.uk Sun Sep 10 15:31:26 1995 Path: ashpoly!cascade!transat!eunet-de!hansebox!demon!tperez From: tperez@demon.co.uk (Thiago Pérez) Newsgroups: comp.dsp Subject: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Sep10.153126.6408@demon.co.uk> Date: Sun, 10 Sep 1995 15:31:26 GMT Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: WinVN 0.99.5 Lines: 11 Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. Each message frame begins with an 8-bit Barker sequence [11100010] for frame synchronization. The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword. -- Thiago Pérez "Do not worship the copy." Atari TT030 / Linux 1.2.13 From clopez@ox.ac.uk Mon Sep 11 01:36:26 1995 Path: ashpoly!cascade!transat!eunet-fr!teletel!ox!clopez From: clopez@ox.ac.uk (Camila López) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Sep11.013626.6464@ox.ac.uk> Date: Mon, 11 Sep 1995 01:36:26 GMT References: <1995Sep10.153126.6408@demon.co.uk> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Sep10.153126.6408@demon.co.uk>, tperez@demon.co.uk (Thiago Pérez) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Camila López *PLONK* filter active for trolls. Pentium 90 (OS/2 Warp) - NetBSD 1.0 From bduarte@delphi.com Mon Sep 11 04:31:26 1995 Path: ashpoly!cascade!brgate!saturno!delphi!bduarte From: bduarte@delphi.com (Bastien Duarte) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Sep11.043126.9328@delphi.com> Date: Mon, 11 Sep 1995 04:31:26 GMT References: <1995Sep10.153126.6408@demon.co.uk> <1995Sep11.013626.6464@ox.ac.uk> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1995Sep11.013626.6464@ox.ac.uk>, clopez@ox.ac.uk (Camila López) writes: > A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Bastien Duarte Tape trading list upon request. SASE required for international mail. From kweber@delphi.com Wed Sep 13 03:49:26 1995 Path: ashpoly!cascade!transat!ukc!fennimore!delphi!kweber From: kweber@delphi.com (Katrin Weber) Newsgroups: comp.dsp Subject: Re: Data: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Sep13.034926.3786@delphi.com> Date: Wed, 13 Sep 1995 03:49:26 GMT References: <1995Sep10.153126.6408@demon.co.uk> <1995Sep11.013626.6464@ox.ac.uk> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 11 In article <1995Sep11.013626.6464@ox.ac.uk>, clopez@ox.ac.uk (Camila López) writes: > A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. PGP Public key available via finger or upon request. -- Katrin Weber Opinions expressed are solely my own and not those of Delphi Internet Services. ------------------------------------------------------------