From ktanaka@cmu.edu Sat Jul 08 04:51:17 1995 Path: ashpoly!cascade!bigsur!cmu!ktanaka From: ktanaka@cmu.edu (Kenji Tanaka) Newsgroups: comp.dsp Subject: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jul08.045117.8667@cmu.edu> Date: Sat, 08 Jul 1995 04:51:17 GMT Organization: Carnegie Mellon University School of CS NNTP-Posting-Host: cmu.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. Has anyone encountered bit errors in their decoded text? The Golay decoder corrects up to 3 bit errors per 24-bit codeword. -- Kenji Tanaka *PLONK* filter active for trolls. Mac IIci / 68882 FPU - NetBSD 1.0 From keriksson@stanford.edu Sat Jul 08 13:26:17 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!stanford!keriksson From: keriksson@stanford.edu (Kirsty Eriksson) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jul08.132617.4808@stanford.edu> Date: Sat, 08 Jul 1995 13:26:17 GMT References: <1995Jul08.045117.8667@cmu.edu> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1995Jul08.045117.8667@cmu.edu>, ktanaka@cmu.edu (Kenji Tanaka) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. -- Kirsty Eriksson Tape trading list upon request. SASE required for international mail. From lsuzuki@demon.co.uk Sun Jul 09 00:49:17 1995 Path: ashpoly!cascade!transat!ukc!fennimore!demon!lsuzuki From: lsuzuki@demon.co.uk (Lisa Suzuki) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jul09.004917.2120@demon.co.uk> Date: Sun, 09 Jul 1995 00:49:17 GMT References: <1995Jul08.045117.8667@cmu.edu> Organization: Demon Internet Services UK NNTP-Posting-Host: demon.co.uk X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Jul08.045117.8667@cmu.edu>, ktanaka@cmu.edu (Kenji Tanaka) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. > The symbol duration is exactly 1.408 seconds, corresponding to a symbol rate of 0.7107 baud (14.2 Hz / 20). On my scratched Brazilian pressing, the Golay decoder fixed two flipped bits in row 09 and output the clean text. -- === Lisa Suzuki === Dept of Electrical Engineering, Demon Internet Services UK "We don't sign stars. We build them." From nlaurent@rwth-aachen.de Sun Jul 09 09:40:17 1995 Path: ashpoly!cascade!bigsur!rwth-aachen!nlaurent From: nlaurent@rwth-aachen.de (Nadia Laurent) Newsgroups: comp.dsp Subject: Re: Discussion: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1995Jul09.094017.5772@rwth-aachen.de> Date: Sun, 09 Jul 1995 09:40:17 GMT References: <1995Jul08.045117.8667@cmu.edu> <1995Jul08.132617.4808@stanford.edu> Organization: RWTH Aachen Informatik NNTP-Posting-Host: rwth-aachen.de X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1995Jul08.132617.4808@stanford.edu>, keriksson@stanford.edu (Kirsty Eriksson) writes: > Every song on SYNTHESIS was engineered to be exactly long enough to transmit one complete telemetry frame. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! -- Nadia Laurent Opinions expressed are solely my own and not those of RWTH Aachen Informatik. ------------------------------------------------------------