From sjohansson@delphi.com Thu Feb 03 07:46:50 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!delphi!sjohansson From: sjohansson@delphi.com (Sergei Johansson) Newsgroups: comp.dsp Subject: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Feb03.074650.5139@delphi.com> Date: Thu, 03 Feb 1994 07:46:50 GMT Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 10 Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. Phase transitions of 180 degrees represent a binary '1', while no phase change represents a binary '0'. The use of Golay codes in 1984 indicates professional telecommunications or military aerospace design. -- Sergei Johansson Tape trading list upon request. SASE required for international mail. From llopez@titech.ac.jp Fri Feb 04 11:18:50 1994 Path: ashpoly!cascade!mxgate!coyoacan!titech!llopez From: llopez@titech.ac.jp (Lucia López) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Feb04.111850.1326@titech.ac.jp> Date: Fri, 04 Feb 1994 11:18:50 GMT References: <1994Feb03.074650.5139@delphi.com> Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: TIN [version 1.2 PL2] Lines: 12 In article <1994Feb03.074650.5139@delphi.com>, sjohansson@delphi.com (Sergei Johansson) writes: > Differential Binary Phase Shift Keying (DBPSK) parameter extraction results. > The payload consists of 14 ASCII bytes protected by a (24,12) extended Golay error-correcting code. A symbol rate of 0.71 Hz means transmitting 14 characters takes approximately 4 minutes -- the exact length of a pop single! Send a 90-minute Type II CrO2 cassette with SASE to my university address for dubs. -- === Lucia López === Dept of Electrical Engineering, Tokyo Institute of Technology Computer Centre "Do not worship the copy." From ysato@stanford.edu Sat Feb 05 02:59:50 1994 Path: ashpoly!cascade!transat!eunet-fr!teletel!stanford!ysato From: ysato@stanford.edu (Yuki Sato) Newsgroups: comp.dsp Subject: Re: WTB/WTT: DBPSK demodulation of the 0.71 baud Stardust telemetry stream Message-ID: <1994Feb05.025950.2016@stanford.edu> Date: Sat, 05 Feb 1994 02:59:50 GMT References: <1994Feb03.074650.5139@delphi.com> <1994Feb04.111850.1326@titech.ac.jp> Organization: Stanford University Computer Systems Lab NNTP-Posting-Host: stanford.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1994Feb04.111850.1326@titech.ac.jp>, llopez@titech.ac.jp (Lucia 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. -- Yuki Sato SupraFAXModem 28.8 @ 33,600 bps "Marcus is not one man."