Title:
複数のシンボル長を使用する多重キャリア送信
Document Type and Number:
Japanese Patent JP4913406
Kind Code:
B2
Abstract:
Techniques to use OFDM symbols of different sizes to achieve greater efficiency for OFDM systems. The system traffic may be arranged into different categories (e.g., control data, user data, and pilot data). For each category, one or more OFDM symbols of the proper sizes may be selected for use based on the expected payload size for the traffic in that category.
In a further aspect, the channel response matrix for each of a plurality of subbands is decomposed in a manner to avoid arbitrary phase rotations from subband to subband by constraining the first element in each column of the first unitary matrix to be a non-negative value.
In another aspect, steering vectors are interpolated between subbands.
Inventors:
Walton, Jay Rodney
Ketchum, John W.
Wallace, mark
Howard, Stephen Jay.
Ketchum, John W.
Wallace, mark
Howard, Stephen Jay.
Application Number:
JP2005501686A
Publication Date:
April 11, 2012
Filing Date:
October 27, 2003
Export Citation:
Assignee:
QUALCOMM INCORPORATED
International Classes:
H04J11/00; H04B7/04; H04B7/06; H04B7/08; H04J99/00; H04L1/00; H04L1/06; H04L12/28; H04L12/56; H04L25/02; H04L25/03; H04L27/26; H04B7/005; H04L1/16; H04W28/20; H04W52/50
Domestic Patent References:
| JP9135230A | ||||
| JP11252037A | ||||
| JP9512156A | ||||
| JP2002118534A | ||||
| JP2000068975A |
Foreign References:
| WO2003047140A1 |
Attorney, Agent or Firm:
Satoshi Kono
Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Ryo Hashimoto
Tetsuya Kazama
Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Ryo Hashimoto
Tetsuya Kazama