Global Patent Index - EP 1317831 A2

EP 1317831 A2 2003-06-11 - METHOD AND ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) RECEIVER FOR REDUCING THE INFLUENCE OF HARMONIC INTERFERENCES ON OFDM TRANSMISSION SYSTEMS

Title (en)

METHOD AND ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) RECEIVER FOR REDUCING THE INFLUENCE OF HARMONIC INTERFERENCES ON OFDM TRANSMISSION SYSTEMS

Title (de)

VERFAHREN UND OFDM-EMPFÄNGER ZUM VERRINGERN DES EINFLUSSES HARMONISCHER STÖRUNGEN AUF OFDM-ÜBERTRAGUNGSSYSTEME

Title (fr)

PROCEDE ET RECEPTEUR A MULTIPLEXAGE FREQUENTIEL OPTIQUE POUR REDUIRE L'INFLUENCE DE PERTURBATIONS HARMONIQUES SUR DES SYSTEMES DE TRANSMISSION A MULTIPLEXAGE FREQUENTIEL OPTIQUE

Publication

EP 1317831 A2 (DE)

Application

EP 01978126 A

Priority

  • DE 0103507 W
  • DE 10045088 A

Abstract (en)

[origin: WO0223844A2] The invention relates to a method and device for improving, on the receive side, the transmission quality (residual/bit error rate) of a data transmission system, which is based on orthogonal frequency division multiplexing (OFDM) technology and which is negatively influenced by narrow-band harmonic interference signals. The invention takes into account two technical measures. In one technical measure, a received OFDM symbol is processed by means of a cyclic rotation of the OFDM receive symbol and of a subsequent Nyquist windowing in the time domain whereby leading to a reduction of the interference spectrum outside of the sub-carrier bandwidth. In the other technical measure, a channel estimation of the channel transmission function on the sub-carrier level is effected in parallel with the first technical measure, and the signal-to-noise ratio is calculated or estimated by estimating the interference power on the sub-carrier level. This information with regard to the noise power is subsequently taken into account as channel state information during an error decoding effected, for example, by a Viterbi decoder.

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

H04L 27/26; H04L 1/00

IPC 8 full level (invention and additional information)

H04L 1/00 (2006.01); H04L 27/26 (2006.01)

CPC (invention and additional information)

H04L 27/2647 (2013.01); H04L 1/0054 (2013.01)

Citation (search report)

See references of WO 0223844A3

Designated contracting state (EPC)

AT DE ES IT SE

EPO simple patent family

WO 0223844 A2 20020321; WO 0223844 A3 20020510; EP 1317831 A2 20030611; US 2004022175 A1 20040205; US 7366088 B2 20080429

INPADOC legal status


2013-11-13 [18R] REFUSED

- Effective date: 20130706

2013-07-06 [REG DE R003] REFUSAL DECISION NOW FINAL

2009-09-30 [RAP1] TRANSFER OF RIGHTS OF AN APPLICATION

- Owner name: PRASENDT INVESTMENTS LLC

2007-08-22 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20070719

2004-05-12 [RBV] DESIGNATED CONTRACTING STATES (CORRECTION)

- Designated State(s): AT DE ES IT SE

2003-06-11 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20030304

2003-06-11 [AK] DESIGNATED CONTRACTING STATES:

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR