NDLI: An interference cancellation scheme using dynamic space code multiple access (DSCMA) system

Content Provider	IEEE Xplore Digital Library
Author	Chee Kyun Ng Ali, B.M. Khatun, S. Jamuar, S.S. Ismail, M.
Copyright Year	2007
Description	Author affiliation: Univ. Kebangsaan Malaysia, Penang (Ismail, M.) \|\| Dept. of Comput. & Commun. Syst. Eng., Penang (Chee Kyun Ng; Ali, B.M.; Khatun, S.) \|\| Univ. Putra Malaysia, Penang (Jamuar, S.S.)
Abstract	Non-uniform traffics can severely degrade the performance of code division multiple access (CDMA) and space division multiple access (SDMA) cellular systems. In this paper, we propose a novel interference cancellation scheme by using the joint multiple access system from the merge of CDMA and SDMA systems to form dynamic space code multiple access (DSCMA). This multiple access system uses a modified version of large area synchronous (LAS) sequence called LAS even-ternary (LAS-ET) sequence to increase its duty ratio. This sequence also exhibits a region called interference free window (IFW) near zero delay time offset. In order to ensure that all the signal components drop within the IFW, a narrow beam with higher directivity smart antenna system is exploited. The size of IFW is adapted to the smart antenna half-power beamwidth using DSC algorithm. By using this algorithm the spectrum efficiency is further increased. Finally, all the interferences induced in non-uniform traffics can be dramatically reduced in DSCMA system and thus resulting in a higher system capacity.
Starting Page	248
Ending Page	253
File Size	729721
Page Count	6
File Format	PDF
ISBN	9781424410934
DOI	10.1109/ICTMICC.2007.4448641
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-05-14
Publisher Place	Malaysia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Gold SDMA Delay effects Adaptive arrays CDMA Multiaccess communication Antenna accessories Interference cancellation Intersymbol interference Multiple access interference Systems engineering and theory Antennas and propagation Interference Cancellation
Content Type	Text
Resource Type	Article

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