The improvement of adaptive bit and power loading algorithm with low complexity in MIMO-OFDM systems

Authors:
Liu Jiancai;Yang Wanwan;Zheng Weili;Wang Yafo;Ye Zhihui;Xu Jiakai;Ning Xinbao
Affiliations:
Dept. of Electronics Science and Engineering, Nanjing University, Nanjing, P.R. China;Dept. of Electronics Science and Engineering, Nanjing University, Nanjing, P.R. China;Dept. of Electronics Science and Engineering, Nanjing University, Nanjing, P.R. China;Dept. of Electronics Science and Engineering, Nanjing University, Nanjing, P.R. China;Dept. of Electronics Science and Engineering, Nanjing University, Nanjing, P.R. China;Dept. of Electronics Science and Engineering, Nanjing University, Nanjing, P.R. China;Dept. of Electronics Science and Engineering, Nanjing University, Nanjing, P.R. China
Venue:
IMSAA'09 Proceedings of the 3rd IEEE international conference on Internet multimedia services architecture and applications
Year:
2009

Citing 4
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Abstract

Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) is a promising technology for high data rate transmission in wideband wireless systems for achieving high downlink capacities in future cellular systems. In this paper subcarrier and power allocation to each user at base-station is allocated to maximize the user data rates, subject to constraints on total power and bit error rate (BER). The chow-campello algorithm has been introduced and analyzed, and a low complexity algorithm has been proposed. The simulation results show that the proposed algorithm can achieve similar performance with much lower computational complexity, which indicates that the proposed algorithm is effective when compared to the existing algorithms.