Title:
OFDMベースのマルチアンテナ通信システムのためのステアリングダイバシティ
Document Type and Number:
Japanese Patent JP5562875
Kind Code:
B2
Abstract:
A transmitting entity uses different steering vectors for different subbands to achieve steering diversity. Each steering vector defines or forms a beam for an associated subband. Any steering vector may be used for steering diversity. The steering vectors may be defined such that the beams vary in a continuous instead of abrupt manner across the subbands. This may be achieved by applying continuously changing phase shifts across the subbands for each transmit antenna. As an example, the phase shifts may change in a linear manner across the subbands for each transmit antenna, and each antenna may be associated with a different phase slope. The application of linearly changing phase shifts to modulation symbols in the frequency domain may be achieved by either delaying or circularly shifting the corresponding time-domain samples.
Inventors:
Stain A. Lundby
Steven Jay. Howard
Jai Rodney Walton
Steven Jay. Howard
Jai Rodney Walton
Application Number:
JP2011005178A
Publication Date:
July 30, 2014
Filing Date:
January 13, 2011
Export Citation:
Assignee:
QUALCOMM INCORPORATED
International Classes:
H04J99/00; H04B7/04; H04B7/06; H04J11/00; H04L27/26
Domestic Patent References:
| JP2004509556A |
Other References:
Dammann, A. 他,Beamforming in combination with space-time diversity for broadbandOFDM systems,Communications, 2002. ICC 2002. IEEE International Conference on,2002年,vol.1,pp.165-171
Kaiser, S.,Spatial transmit diversity techniques for broadband OFDM systems,Global Telecommunications Conference, 2000. GLOBECOM '00. IEEE,2000年,vol.3,pp.1824-1828
Kaiser, S.,Spatial transmit diversity techniques for broadband OFDM systems,Global Telecommunications Conference, 2000. GLOBECOM '00. IEEE,2000年,vol.3,pp.1824-1828
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