Presentation	1999/2/18 Considerations on a CDMA System Using Multibeam Array Antennas Minako KITAHARA, Yasutaka OGAWA,
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Abstract(in English)	In a DS-CDMA system, the same frequency band is shared with other users using different spreading codes. The signals interfere with each other. Interference cancelers and adaptive array antennas have been studied to reduce the interference. On the other hand, multibeam array antenna can reduce the interference because it has a filtering funcion in the space domain. In this paper, we evaluate the bit error rate perfomance in a down link of the DS-CDMA system. We show that the multibeam antenna has much better performance than the omnidirectional antenna. Furthermore, it has been shown that the excitation which lowers the sidelobe leveas reveals better performance in a multipath environment.
Keyword(in Japanese)	(See Japanese page)
Keyword(in English)	DS-CDMA / Multibeam Antenna / Forward Link
Paper #	RCS98-231
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Conference Information
Committee	RCS
Conference Date	1999/2/18(1days)
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Paper Information
Registration To	Radio Communication Systems (RCS)
Language	JPN
Title (in Japanese)	(See Japanese page)
Sub Title (in Japanese)	(See Japanese page)
Title (in English)	Considerations on a CDMA System Using Multibeam Array Antennas
Sub Title (in English)
Keyword(1)	DS-CDMA
Keyword(2)	Multibeam Antenna
Keyword(3)	Forward Link
1st Author's Name	Minako KITAHARA
1st Author's Affiliation	Sendai Lab., Kokusai Electric co., Ltd.()
2nd Author's Name	Yasutaka OGAWA
2nd Author's Affiliation	Graduate School of Engineering Hokkaido University
Date	1999/2/18
Paper #	RCS98-231
Volume (vol)	vol.98
Number (no)	601
Page	pp.pp.-
#Pages	8
Date of Issue