The BT experience of implementing 140 Mbit/s 8-PSK carriers for transatlantic cable restoration purposes

Author

Prouse, D.W.

Author_Institution

BT Worldwide Networks, London, UK

fYear

1993

fDate

2-4 Nov 1993

Firstpage

86

Lastpage

90

Abstract

For many years, the satellite communications fraternity has grappled with the problem of squeezing carriers with an information rate of 140 Mbit/s into a transponder bandwidth of 72 MHz, which has a practical transmission rate limit of around 60 MBaud (i.e. 120 Mbit/s when using the 4-phase PSK modulation technique). This paper describes the BT experience in implanting the solution agreed upon with AT&T and France Telecom for the restoration via satellite of failed transatlantic cable systems. The paper charts progress from the decision to use 8-phase Phase Shift Keying (PSK) with rate-5/6 Forward Error Correction (FEC) encoding through to successful operation, including details of system design, implementation, performance evaluation and operational experiences

Keywords

digital radio systems; error correction codes; phase shift keying; satellite relay systems; 140 Mbit/s; 72 MHz; 8-PSK carriers; 8-phase Phase Shift Keying; AT&T; BT; FEC encoding; Forward Error Correction; France Telecom; performance evaluation; satellite communications; system design; transatlantic cable restoration; transponder bandwidth;

fLanguage

English

Publisher

iet

Conference_Titel

Satellite Communications - ECSC-3, 1993., 3rd European Conference on

Conference_Location

Manchester

Print_ISBN

0-85296-603-2

Type

conf

Filename

266131