Denne prototypen var det norske testapparatet i en internasjonal konkurranse om best løsning for det felles digitale mobilnettet GSM i Paris i 1986. Det ble utviklet av Torleiv Maseng og Odd Trandem ved ELAB / SINTEF i et prosjekt ledet av Televerkets Forskningsinstitutt.
Apparatet og metoden gjorde suksess. Hemmeligheten lå i signalbehandlingen som kortene i apparatet prosesserte. Med små justeringer ble det norske systemet valgt som europeisk standard for GSM - dagens mobilnett som nå er videreutviklet til 5. generasjon (5G).
This device was the Norwegian test apparatus that entered the international competition for the pan-European standard for digital mobile telephony - GSM - in 1986. It was developed by Torleiv Maseng and Odd Trandem at SINTEF Energy Lab in a project lead by the Research Institute of Televerket, the Norwegian state-owned telecommunications company.
The Norwegians were successful. The secret was in the signal treatment they had applied. With just a few minor adjustments, the Norwegian system was chosen as the European standard.
Det siste jeg gjorde før jeg dro fra SINTEF i 1991 var å pakke den ned i en kasse. Trodde aldri jeg skulle se den igjen. Jobbet bl a med å programmere denne i perioden 1988-1991.
Ove Rikvold,
October 22, 2021
I was a student at NTH in 1983. The early prototype used PROM (one-time programmable, fast and dense memories) for SW for the DSPs (Digital Signal Processors). New batch of PROMs were expensive! I had designed an SRAM-based solution to replace PROMs for my BBC Model B micro. I proposed and designed a more cost-effective solution when the DSP boards were updated. SRAM is fast, dense but volatile and must be initialized. The approach was to use EPROMs (cheap, reprogrammable, dense and SLOW) for DSP SW storage. Upon startup, the DSP was held in reset and tri-stated, the EPROM content was copied (slowly) to SRAM and when done, tri-stated. Then DSPs were released from reset and could execute from SRAM. This allowed far more experiments with new SW and algorithms. A small, but useful contribution - I hope!
Morten Christiansen,
January 11, 2023
Jeg må korrigere meg selv i kommentaren over. På NTM ser jeg at dette er første versjon, jeg jobbet med en oppdatert utgave.
Ove Rikvold,
October 21, 2023
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3 comments
Ove Rikvold, October 22, 2021
Morten Christiansen, January 11, 2023
Ove Rikvold, October 21, 2023
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