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1. (US20140219381) Wireless communication apparatus, wireless communication system and wireless communication method

Office : United States of America
Application Number: 14251955 Application Date: 14.04.2014
Publication Number: 20140219381 Publication Date: 07.08.2014
Grant Number: 08923428 Grant Date: 30.12.2014
Publication Kind : B2
IPC:
H04B 7/02
H04B 7/04
H04B 7/06
H04B 7/10
H04L 25/03
H04B 7/00
H04L 25/02
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
B
TRANSMISSION
7
Radio transmission systems, i.e. using radiation field
02
Diversity systems
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
B
TRANSMISSION
7
Radio transmission systems, i.e. using radiation field
02
Diversity systems
04
using a plurality of spaced independent aerials
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
B
TRANSMISSION
7
Radio transmission systems, i.e. using radiation field
02
Diversity systems
04
using a plurality of spaced independent aerials
06
at transmitting station
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
B
TRANSMISSION
7
Radio transmission systems, i.e. using radiation field
02
Diversity systems
10
using a single aerial system characterised by its polarisation or directive properties, e.g. polarisation diversity, direction diversity
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
25
Baseband systems
02
Details
03
Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
B
TRANSMISSION
7
Radio transmission systems, i.e. using radiation field
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
25
Baseband systems
02
Details
Applicants: Panasonic Intellectual Property Corporation of America
Inventors: Yu Qian
Huang Lei
Hoshino Masayuki
Imamura Daichi
Agents: Pearne & Gordon LLP
Priority Data: 2009-001352 07.01.2009 JP
Title: (EN) Wireless communication apparatus, wireless communication system and wireless communication method
Abstract: front page image
(EN)

In a MIMO system using a cross-polarized antenna structure, even if no ideal XPD can be obtained, the interference between different polarized waves can be reduced to allow an effective precoding to be executed. When a MIMO communication is performed between a transmitter and a receiver each using a cross-polarized antenna structure, a channel estimating and precoding selection section of the receiver performs a channel estimation of MIMO channels from the transmitter to the receiver, decides a precoding matrix of a projection matrix for mutually orthogonalizing or substantially orthogonalizing the channel response matrixes for respective different polarized waves, and feeds the determined precoding matrix back to the transmitter. In the transmitter, a precoding processing section applies the precoding matrix to the spatial stream corresponding to one of the polarized waves to perform a precoding, thereby allowing the transmitter to transmit the polarized waves with the orthogonality therebetween maintained.


Also published as:
EP2375604JPWO2010079748US20110261894CN102273115JP2013225934EP2660991
JP2014112841US20140226742US20150103939JP2015119493DK2375604ES2691037
WO/2010/079748