AN ADAPTIVE FUZZY LOGIC CODE ALLOCATOR FOR 2-D OVSF CODED OFCDM COMMUNICATION SYSTEMS OVER DUAL SELECTIVE FADING CHANNELS

摘要：

In this paper, we investigate the multiuser performance in a 2-D spreading orthogonal frequency coded division multiplexing (OFCDM) communication system over frequency and time selective fading channels. To compromise between the diversity gain and the multiple access interference (MAI), we propose an adaptive fuzzy logic to infer adequate 2-D spreading codes and to assign the OVSF codes to active users for OFCDM mobile communication systems. Moreover, we develop a look-up table to simplify the complexity. Simulation results show that the proposed both fuzzy logic code allocator (FLCA) and look-up table can not only suppress the MAIs induced by the non-orthogonality but also exploit the diversity gain over dual (time and frequency) selective fading channels.

关键词： OFCDM 2-D spreading code Diversity gain MAI Dual selective fading channel Look-up table Fuzzy logic

作者: YUNG-FA HUANG TAN-HSU TAN YUNG-FU CHEN CHIA-HSIN CHENG

作者单位: Departmmt of Information and Communication Engineering, Chaoyang University of Technology, Taichung Department of Electrical Engineering, National Taipei University of Technology, Taipei 105, Taiwan Department of Health Services Administration, China Medical University, Taichung, Taiwan Department of Electrical Engineering, National Formosa University, Unlin, Taiwan

会议类型: 国际会议

会议名称: 2009 International Conference on Machine Learning and Cybernetics(2009机器学习与控制论国际会议)

会议地点: 保定

会议语种:英文

页码: 3030-3035

在线出版日期: 2009-07-12（万方平台首次上网日期，不代表论文的发表时间）