Global Patent Index - EP 0860072 A1

EP 0860072 A1 19980826 - METHODS AND APPARATUS FOR ENCODING AND DECODING DATA

Title (en)

METHODS AND APPARATUS FOR ENCODING AND DECODING DATA

Title (de)

VERFAHREN UND VORRICHTUNG ZUR KODIERUNG UND DEKODIERUNG VON DATEN

Title (fr)

PROCEDES ET APPAREIL DE CODAGE ET DE DECODAGE DE DONNEES

Publication

EP 0860072 A1 19980826 (EN)

Application

EP 97919138 A 19970910

Priority

  • EP 97919138 A 19970910
  • EP 96306607 A 19960910
  • GB 9702464 W 19970910
  • GB 9623940 A 19961115
  • GB 9625710 A 19961211
  • GB 9715721 A 19970726

Abstract (en)

[origin: WO9811698A1] In a coded orthogonal frequency division multiplex (COFDM) system n-bit data words are encoded as 2<m>-symbol code words (binary, quaternary, octary, etc.). The code words are selected for desired low peak-to-mean envelope power ratio (PMEPR) characteristics of transmissions over a COFDM channel, from a set of cosets of a linear subcode of a code having a specified generator matrix. The code words thus identified by the procedure described can, even for values of m in excess of 3, simultaneously limit the PMEPR to 3 dB, provide specified error control characteristics, be implemented in a feasible manner using analytical circuit techniques (e.g. with combinatorial logic), and include sufficiently many different code words to enable data to be transferred at useful rates. Other selections of code words can be made, enabling a higher maximum PMEPR or a reduced error detection capability to be accepted in order to obtain a higher code rate.

IPC 1-7

H04L 27/26; H04L 5/06

IPC 8 full level

H04J 11/00 (2006.01); H04L 1/00 (2006.01); H04L 5/06 (2006.01); H04L 25/49 (2006.01); H04L 27/26 (2006.01)

CPC (source: EP US)

H04L 1/004 (2013.01 - EP); H04L 25/4908 (2013.01 - EP); H04L 27/2602 (2013.01 - EP US); H04L 27/2617 (2013.01 - EP); H04L 27/26025 (2021.01 - EP US)

Citation (search report)

See references of WO 9811698A1

Designated contracting state (EPC)

CH DE FI FR GB LI SE

DOCDB simple family (publication)

WO 9811698 A1 19980319; EP 0860072 A1 19980826; JP 2000516072 A 20001128

DOCDB simple family (application)

GB 9702464 W 19970910; EP 97919138 A 19970910; JP 51338398 A 19970910