Title:
TRANSMISSION DIVERSITY COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2002/015433
Kind Code:
A1
Abstract:
A plurality of antennas for transmission diversity at a base station are arranged into groups. Antennas are arranged such that the antennas in the same group transmit signals of strong fading correlation and that the fading correlation between groups is weak. Since the signals transmitted from the antennas in the same group have strong fading correlation, fading is not likely to change, and thus high control speed may not be necessary. On the other hand, the control between groups needs high speed. Therefore, mobile stations receiving signals from the base station transmit feedback information for controlling the fading between groups to the base station at high transmission speed, and feedback information in the same group is transmitted to the base station at low transmission speed.
Inventors:
TANAKA YOSHINORI (JP)
Application Number:
PCT/JP2000/005380
Publication Date:
February 21, 2002
Filing Date:
August 10, 2000
Export Citation:
Assignee:
FUJITSU LTD (JP)
TANAKA YOSHINORI (JP)
TANAKA YOSHINORI (JP)
International Classes:
H04B7/06; H04W16/28; H04W88/08; (IPC1-7): H04B7/06; H04B7/26; H01Q3/24
Foreign References:
| JPS5887928A | 1983-05-25 | |||
| JPH10190537A | 1998-07-21 | |||
| JPH09200115A | 1997-07-31 |
Other References:
See also references of EP 1315311A4
Attorney, Agent or Firm:
Osuga, Yoshiyuki (Nibancho Chiyoda-ku Tokyo, JP)
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