Title :
A new dynamic code assignment algorithm for joint CDMA and SDMA system
Author :
Odeh, Nidhal ; Khatun, Sabira ; Ismail, Alyani ; Ali, Borhanuddin Mohd
Author_Institution :
Dept. of Comput. & Commun. Syst. Eng., Univ. Putra Malaysia, Serdang
Abstract :
This article describes an optimal dynamic code assignment algorithm, which can be used to maximize the total number of users in combined C-SDMA system with minimum required quality of service (QoS) and limited number of codes. Here, a single cell adopts combined C-SDMA system as air-interface, and accommodate any number of users distributed randomly within it. The probability of blocking is calculated to evaluate the system performance for different number of users and available codes. Results show that the proposed algorithm improves the system performance significantly compared to the existing algorithms. Finally, this algorithm enhances system capacity with limited resources.
Keywords :
adaptive antenna arrays; code division multiple access; space division multiple access; CDMA system; SDMA system; air-interface; dynamic code assignment algorithm; quality of service; smart antenna system; Base stations; Directive antennas; Gain; Heuristic algorithms; Mobile antennas; Multiaccess communication; Multiple access interference; Quality of service; System performance; Transmitting antennas; Code assignement; SDMA; Smart antenna; Wireless CDMA; code reuse ratio;
Conference_Titel :
Communications, 2008. APCC 2008. 14th Asia-Pacific Conference on
Conference_Location :
Tokyo
Print_ISBN :
978-4-88552-232-1
Electronic_ISBN :
978-4-88552-231-4
