Global Patent Index - EP 1062781 A1

EP 1062781 A1 2000-12-27 - QUADRATURE RECEIVER, COMMUNICATION SYSTEM, SIGNAL PROCESSOR, METHOD OF CALCULATING DIRECT CURRENT OFFSET, AND METHOD OF OPERATING A QUADRATURE RECEIVER

Title (en)

QUADRATURE RECEIVER, COMMUNICATION SYSTEM, SIGNAL PROCESSOR, METHOD OF CALCULATING DIRECT CURRENT OFFSET, AND METHOD OF OPERATING A QUADRATURE RECEIVER

Title (de)

QUADRATUREMPFÄNGER, KOMMUNIKATIONSSYSTEM, SIGNALPROZESSOR, VERFAHREN ZUM BERECHNEN DES GLEICHSTROM-OFFSETS, UND VERFAHREN ZUM BETRIEB EINES QUADRATUREMPFÄNGERS

Title (fr)

RECEPTEUR EN QUADRATURE, SYSTEME DE COMMUNICATION, PROCESSEUR DE SIGNAUX, CALCUL DU DECALAGE DE COURANT CONTINU, ET MODE DE FONCTIONNEMENT DUDIT RECEPTEUR

Publication

EP 1062781 A1 (EN)

Application

EP 99968953 A

Priority

  • US 9930803 W
  • US 21923598 A

Abstract (en)

[origin: WO0038385A1] A quadrature receiver (10) including a downconverter (22) configured to convert a wireless communication signal into a baseband signal; and an I/Q offset processor (40) coupled with the downconverter (22) and configured to sample the baseband signal to provide plural sampled vectors, to generate a difference vector from the sampled vectors, to generate a scaled vector from the difference vector, and to sum the difference vector, the scaled vector and one of the sampled vectors to provide a direct current offset signal. A method of calculating direct current offset including receiving a wireless communication signal; downconverting the wireless communication signal following the receiving; sampling the wireless communication signal providing plural sampled vectors; calculating a difference vector from the sampled vectors; calculating a scaled vector from the difference vector; and summing the difference vector, the scaled vector and one of the sampled vectors to provide a direct current offset signal.

IPC 1-7 (main, further and additional classification)

H04L 25/06; H04L 27/152

IPC 8 full level (invention and additional information)

H04L 27/14 (2006.01); H03D 3/00 (2006.01); H04B 1/16 (2006.01); H04B 1/30 (2006.01); H04L 25/06 (2006.01); H04L 27/22 (2006.01)

CPC (invention and additional information)

H04L 25/063 (2013.01); H03D 3/008 (2013.01)

Citation (search report)

See references of WO 0038385A1

Designated contracting state (EPC)

DE FR GB

EPO simple patent family

WO 0038385 A1 20000629; EP 1062781 A1 20001227; JP 2002533999 A 20021008

INPADOC legal status


2003-07-02 [18W] WITHDRAWN

- Effective date: 20030505

2001-03-07 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20001229

2000-12-27 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE FR GB