Title:
MULTI-BEAM ANTENNA TRANSMITTER/RECEIVER AND TRANSMITTING/RECEIVING METHOD AND TRANSMISSION BEAM SELECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2003/081805
Kind Code:
A1
Abstract:
A transmitter/receiver comprises reception beam formation units (1041 - 104M) that form a plurality of reception beams, and transmission beam formation units (1131 - 113J) that form a plurality of transmission beams. The transmitter/receiver further comprises reception beam calculation processors (1081 - 108M) that calculate the overall reception quality from the reception quality for each path delay of a user signal for each reception beam, and a transmission beam selector (109) that selects a reception beam whose overall reception quality is excellent and selects a transmission beam having a direction that is the same as, or close to the direction of the selected reception beam. Therefore, the optimum transmission beam may be selected even in a multi-path environment.
Inventors:
MARUTA YASUSHI (JP)
Application Number:
PCT/JP2003/001791
Publication Date:
October 02, 2003
Filing Date:
February 19, 2003
Export Citation:
Assignee:
NEC CORP (JP)
MARUTA YASUSHI (JP)
MARUTA YASUSHI (JP)
International Classes:
H01Q3/26; H01Q25/00; H04B7/04; H04B7/06; H04B7/08; H04J99/00; (IPC1-7): H04B7/06; H01Q3/26
Foreign References:
| JPH0541607A | 1993-02-19 | |||
| JPH10285092A | 1998-10-23 | |||
| JP2001251233A | 2001-09-14 |
Other References:
See also references of EP 1492252A4
None
None
Attorney, Agent or Firm:
Yamakawa, Masaki c/o Yamakawa International Patent 0ffice (8th Floor Shuwa-Tameike Building, 4-2,
Nagatacho 2-chom, Chiyoda-ku Tokyo, JP)
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