(19)

(11)

EP 3 155 721 A1

(12)

(43) Date of publication: 19.04.2017 Bulletin 2017/16 (21) Application number: 14894315.2 (22) Date of filing: 13.06.2014

(51) International Patent Classification (IPC):  H03F 1/30(2006.01) (86) International application number: PCT/CN2014/079807 (87) International publication number: WO 2015/188363 (17.12.2015 Gazette 2015/50)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME (71) Applicant: Nokia Technologies Oy 02610 Espoo (FI)	(72) Inventor: WANG, Zhancang Beijing 101121 (CN) (74) Representative: Nokia Corporation  Intellectual Property Department Karakaari 7 02610 Espoo 02610 Espoo (FI)