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A noble channel controller for combined CDMA and SDMA systems

The proposed Channel Controller according to the present invention is an enhancement of the existing CDMA, SDMA or C-SDMA systems by using a limited number of available spreading codes and a novel channel (code, AoA) controller to maintain the maximum orthogonality among users. These channels (codes...

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Main Authors: Khatun, Sabira, Mohd Ali, Borhanuddin, Odeh, Nidhal A. S.
Format: Patent
Published: 2009
Online Access:http://psasir.upm.edu.my/id/eprint/26595/
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spelling my.upm.eprints.265952018-03-29T02:48:05Z http://psasir.upm.edu.my/id/eprint/26595/ A noble channel controller for combined CDMA and SDMA systems Khatun, Sabira Mohd Ali, Borhanuddin Odeh, Nidhal A. S. The proposed Channel Controller according to the present invention is an enhancement of the existing CDMA, SDMA or C-SDMA systems by using a limited number of available spreading codes and a novel channel (code, AoA) controller to maintain the maximum orthogonality among users. These channels (codes) are stored in a central pool (BS) and maintained as follows. When a new user requests for a channel, the BS first checks the available channels in terms of codes and Angle of Arrival (AoA); if then are spatially orthogonal to each other, otherwise an available new code will be assigned. If all codes are already utilized then the user will be blocked. This will reduce blocking probability and interference significantly among the users that causes the capacity limit of C-SDMA systems. This dynamic channel controller is able to maximize the channel reuse ratio (maximize the number of users using the same code), thus the total number of served users can be increased significantly, hence the system capacity. 2009-02-04 Patent NonPeerReviewed Sabira Khatun (2009) A noble channel controller for combined CDMA and SDMA systems. UNSPECIFIED.
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
description The proposed Channel Controller according to the present invention is an enhancement of the existing CDMA, SDMA or C-SDMA systems by using a limited number of available spreading codes and a novel channel (code, AoA) controller to maintain the maximum orthogonality among users. These channels (codes) are stored in a central pool (BS) and maintained as follows. When a new user requests for a channel, the BS first checks the available channels in terms of codes and Angle of Arrival (AoA); if then are spatially orthogonal to each other, otherwise an available new code will be assigned. If all codes are already utilized then the user will be blocked. This will reduce blocking probability and interference significantly among the users that causes the capacity limit of C-SDMA systems. This dynamic channel controller is able to maximize the channel reuse ratio (maximize the number of users using the same code), thus the total number of served users can be increased significantly, hence the system capacity.
format Patent
author Khatun, Sabira
Mohd Ali, Borhanuddin
Odeh, Nidhal A. S.
spellingShingle Khatun, Sabira
Mohd Ali, Borhanuddin
Odeh, Nidhal A. S.
A noble channel controller for combined CDMA and SDMA systems
author_facet Khatun, Sabira
Mohd Ali, Borhanuddin
Odeh, Nidhal A. S.
author_sort Khatun, Sabira
title A noble channel controller for combined CDMA and SDMA systems
title_short A noble channel controller for combined CDMA and SDMA systems
title_full A noble channel controller for combined CDMA and SDMA systems
title_fullStr A noble channel controller for combined CDMA and SDMA systems
title_full_unstemmed A noble channel controller for combined CDMA and SDMA systems
title_sort noble channel controller for combined cdma and sdma systems
publishDate 2009
url http://psasir.upm.edu.my/id/eprint/26595/
_version_ 1643828959880675328
score 13.211869

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