Title:
時分割多重(TDD)通信システムにおけるMIMO通信のためのフィードバック及びレートアダプテーション
Document Type and Number:
Japanese Patent JP2011517373
Kind Code:
A
Abstract:
Techniques for sending a MIMO transmission in a wireless communication system are described. In one design, a transmitter sends a first reference signal to a receiver. The receiver selects a precoding matrix based on the first reference signal and in accordance with a selection criterion. The receiver estimates noise and interference at the receiver and determines channel quality indicator (CQI) or modulation and coding scheme (MCS) information based on the precoding matrix and the estimated noise and interference. The receiver sends the CQI or MCS information and a second reference signal to the transmitter. The transmitter selects the precoding matrix based on the second reference signal and in accordance with the same selection criterion used by the receiver. The transmitter then sends a MIMO transmission to the receiver based on the CQI or MCS information obtained from the receiver and the precoding matrix selected by the transmitter.
Inventors:
Shu, Hao
Maladi, Darga Prasad
Maladi, Darga Prasad
Application Number:
JP2010521126A
Publication Date:
June 02, 2011
Filing Date:
August 12, 2008
Export Citation:
Assignee:
QUALCOMM INCORPORATED
International Classes:
H04W16/28; H04B7/04; H04J99/00; H04W24/10
Domestic Patent References:
| JP2005509316A | 2005-04-07 | |||
| JP2008547276A | 2008-12-25 |
Foreign References:
| WO2006138555A2 | 2006-12-28 |
Attorney, Agent or Firm:
Kurata Masatoshi
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Kocho Chojiro
Naoki Kono
Katsu Sunagawa
Katsumura Hiro
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Takenori Masanori
Takuzo Ichihara
Yamashita Gen
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Kocho Chojiro
Naoki Kono
Katsu Sunagawa
Katsumura Hiro
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Takenori Masanori
Takuzo Ichihara
Yamashita Gen