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 JP5221743
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:
Jay Rodney Walton
John W. Ketchum
Mark Wallace
Steven Jay. Howard
John W. Ketchum
Mark Wallace
Steven Jay. Howard
Application Number:
JP2011256173A
Publication Date:
June 26, 2013
Filing Date:
November 24, 2011
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 | ||||
| JP2002118534A | ||||
| JP200068975A | ||||
| JP9512156A |
Foreign References:
| WO2003047140A1 |
Attorney, Agent or Firm:
Kurata Masatoshi
Takakura Shigeo
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Kocho Chojiro
Naoki Kono
Katsu Sunagawa
Morisezo Iseki
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Takenori Masanori
Takakura Shigeo
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Kocho Chojiro
Naoki Kono
Katsu Sunagawa
Morisezo Iseki
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Takenori Masanori