Title :
A bipartite matching based user grouping method for grouped OFDM-IDMA systems
Author :
Xiaotian Zhou ; Liuqing Yang ; Dongfeng Yuan
Author_Institution :
Sch. of Inf. Sci. & Eng., Shandong Univ., Jinan, China
fDate :
Oct. 29 2012-Nov. 1 2012
Abstract :
In this paper, we present a novel user grouping method for grouped OFDM-IDMA systems. Aiming at maximizing the system capacity, we adaptively distribute the users among the pre-allocated subcarrier groups according to their respective channel conditions. We analyze the achievable capacity of the system and formulate the optimization problem as a weighted bipartite matching problem. Kuhn-Munkres method is employed to solve the problem. The performance of the proposed scheme is evaluated through both theoretical analysis and simulation. It shows that with our proposed algorithm, the system throughput is greatly improved and is very close to the theoretical upper bound.
Keywords :
OFDM modulation; code division multiple access; optimisation; Kuhn-Munkres method; grouped OFDM-IDMA systems; optimization problem; pre-allocated subcarrier groups; user grouping method; weighted bipartite matching problem; Bandwidth; Bipartite graph; Multiuser detection; Resource management; Signal to noise ratio; Throughput; Upper bound;
Conference_Titel :
MILITARY COMMUNICATIONS CONFERENCE, 2012 - MILCOM 2012
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4673-1729-0
DOI :
10.1109/MILCOM.2012.6415814