(19)

(11)

EP 0 571 489 A1

(12)

(43) Date of publication: 01.12.1993 Bulletin 1993/48 (21) Application number: 92905342.0 (22) Date of filing: 11.02.1992

(51) International Patent Classification (IPC):  H04B 3/ 23( . ) (86) International application number: PCT/SE1992/000081 (87) International publication number: WO 1992/015156 (03.09.1992 Gazette 1992/23)

(84) Designated Contracting States: BE CH DE DK ES FR GB GR IT LI NL (30) Priority: 14.02.1991 SE 19910000447 06.06.1991 SE 19910001723 (71) Applicant: TELEFONAKTIEBOLAGET LM ERICSSON S-126 25 Stockholm (SE)	(72) Inventors: MIKAEL, André, Tore S-124 42 Bandhagen (SE) SJÖBERG, Per-Olof Arlington, MA 02174 (SE) (74) Representative: Larfeldt, Helene, et al  Bergenstrahle & Lindvall AB Box 17704 S-118 93 Stockholm S-118 93 Stockholm (SE)