Global Patent Index - EP 1226651 A4

EP 1226651 A4 20030423 - IMPROVEMENTS RELATING TO EER TRANSMITTERS

Title (en)

IMPROVEMENTS RELATING TO EER TRANSMITTERS

Title (de)

VERFAHREN ZUM VERBESSERN VON SENDERN

Title (fr)

AMELIORATIONS APPORTEES DES EMETTEURS EER

Publication

EP 1226651 A4 20030423 (EN)

Application

EP 00970330 A 20000929

Priority

  • NZ 0000189 W 20000929
  • NZ 33809799 A 19990929

Abstract (en)

[origin: WO0124356A1] Amplification systems based on EER techniques, generally using digital methods to determine envelope and phase information. Cartesian or predistortion feedback is preferably used to improve a range of characteristics. Envelope modulation may be implemented in various ways such as a sigma delta modulator. Phase modulation may also be implemented in various ways such as a fractional N phase lock loop.

IPC 1-7

H03C 5/00; H04L 27/34; H03L 7/197; H03F 1/32

IPC 8 full level

H03F 1/02 (2006.01); H03F 1/32 (2006.01); H03L 7/089 (2006.01); H03L 7/18 (2006.01); H03L 7/197 (2006.01)

CPC (source: EP)

H03F 1/0266 (2013.01); H03F 1/3247 (2013.01); H03F 1/3282 (2013.01); H03L 7/0891 (2013.01); H03L 7/0898 (2013.01); H03L 7/18 (2013.01); H03F 2200/102 (2013.01); H03F 2200/331 (2013.01); H03L 7/1974 (2013.01)

Citation (search report)

  • [XY] EP 0360178 A2 19900328 - HUGHES NETWORK SYSTEMS [US]
  • [Y] WO 9905783 A1 19990204 - MOTOROLA INC [US]
  • [Y] WO 9914859 A1 19990325 - ERICSSON TELEFON AB L M [SE]
  • [XY] US 5420536 A 19950530 - FAULKNER MICHAEL [AU], et al
  • [Y] GB 2283629 A 19950510 - MOTOROLA LTD [GB]
  • [Y] MUHONEN K ET AL: "Amplifier linearization for the local multipoint distribution system application", PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS, 1998. THE NINTH IEEE INTERNATIONAL SYMPOSIUM ON BOSTON, MA, USA 8-11 SEPT. 1998, NEW YORK, NY, USA,IEEE, US, 8 September 1998 (1998-09-08), pages 687 - 692, XP010314506, ISBN: 0-7803-4872-9
  • See references of WO 0124356A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL

DOCDB simple family (publication)

WO 0124356 A1 20010405; AU 782014 B2 20050630; AU 7972900 A 20010430; CA 2385948 A1 20010405; EP 1226651 A1 20020731; EP 1226651 A4 20030423; NZ 338097 A 20010525

DOCDB simple family (application)

NZ 0000189 W 20000929; AU 7972900 A 20000929; CA 2385948 A 20000929; EP 00970330 A 20000929; NZ 33809799 A 19990929