EP 1745617 A1 20070124 - SYSTEM, METHOD, APPARATUS, AND COMPUTER PROGRAM FOR WIRELESS COMMUNICATION
Title (en)
SYSTEM, METHOD, APPARATUS, AND COMPUTER PROGRAM FOR WIRELESS COMMUNICATION
Title (de)
SYSTEM, VERFAHREN, VORRICHTUNG UND COMPUTERPROGRAMM ZUR DRAHTLOSEN KOMMUNIKATION
Title (fr)
SYSTEME, PROCEDE, APPAREIL ET PROGRAMME D'ORDINATEUR POUR ETABLIR UNE COMMUNICATION SANS FIL
Publication
Application
Priority
- JP 2005007747 W 20050418
- JP 2004140488 A 20040510
- US 23804 A 20041201
Abstract (en)
[origin: WO2005109805A1] The disclosed invention enhances transmission efficiency by decreasing regions of reference signals which are attached to transmit packets from a transmitter during bidirectional SVD-MIMO communication. The transmitter transmits user data following a reference signal. At the other end, the receiver acquires a channel matrix, based on the reference signal attached preceding the user data, receives the user data, while weighting the data with receive weights derived from the channel matrix, adaptively estimates the channel matrix H as long as the user data is being received, and obtains transmit weights V' for transmitting user data in the reverse direction from an adaptively estimated channel matrix H'.
IPC 8 full level
H04L 25/02 (2006.01); H04B 7/04 (2006.01); H04B 7/06 (2006.01)
CPC (source: EP KR)
H04B 7/0417 (2013.01 - EP KR); H04B 7/0634 (2013.01 - EP KR); H04L 25/0226 (2013.01 - EP KR); H04L 25/0246 (2013.01 - EP KR); H04L 25/0248 (2013.01 - EP KR)
Citation (search report)
See references of WO 2005109805A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 2005109805 A1 20051117; EP 1745617 A1 20070124; KR 101098215 B1 20111228; KR 20070010147 A 20070122
DOCDB simple family (application)
JP 2005007747 W 20050418; EP 05734759 A 20050418; KR 20067021042 A 20050418