Title:
MIMO通信システムにおける送信チェーン及び受信チェーンの校正
Document Type and Number:
Japanese Patent JP4494462
Kind Code:
B2
Abstract:
Techniques for calibrating the transmit and receive chains at a wireless entity are described. For a pre-calibration, N first overall gains for a receiver unit and N transmitter units in the transmit chain are obtained, where N > 1. Each first overall gain is for a combined response for the receiver unit and the associated transmitter unit. N second overall gains for a transmitter unit and N receiver units in the receive chain are also obtained. Each second overall gain is for a combined response for the transmitter unit and the associated receiver unit. The gain of each transmitter unit and the gain of each receiver unit are determined based on the first and second overall gains. At least one correction matrix is then derived based on the gains of the transmitter and receiver units and is used to account for the responses of these units.
Inventors:
Inoguru, Hakan
Application Number:
JP2007506213A
Publication Date:
June 30, 2010
Filing Date:
March 15, 2005
Export Citation:
Assignee:
QUALCOMM INCORPORATED
International Classes:
H04J99/00; H04B7/04; H04B7/06; H04L25/03; H04L25/02
Domestic Patent References:
| JP2002530998A |
Foreign References:
| WO2004025841A1 |
Other References:
Sakaguchi, K. et al.,Comprehensive calibration for MIMO system,Wireless Personal Multimedia Communications,2002. The 5th International Symposium on,2002年10月,Vol.2,pp.440-443
Jian Liu et al.,OFDM-MIMO WLAN AP Front-end Gain and Phase Mismatch Calibration,Radio and Wireless Conference,2004 IEEE,2004年 9月,pp.151-154
Jian Liu et al.,OFDM-MIMO WLAN AP Front-end Gain and Phase Mismatch Calibration,Radio and Wireless Conference,2004 IEEE,2004年 9月,pp.151-154
Attorney, Agent or Firm:
Takehiko Suzue
Satoshi Kono
Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Katsu Sunagawa
Ryo Hashimoto
Tetsuya Kazama
Satoshi Kono
Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Katsu Sunagawa
Ryo Hashimoto
Tetsuya Kazama