基于载干比最优的OFDMA切换算法的研究  

Study on the Handover Algorithm Based on Carrier-interference Ratio Optimization in OFDMA System

作　　者：王卫东[1] 张英海[1] 张恒[1] 赵晶[1] 王首峰[1] 

机构地区：[1]北京邮电大学信息与电子技术研究室,北京100876

出　　处：《电子学报》2010年第1期213-217,共5页Acta Electronica Sinica

基　　金：国家自然科学基金(No.60672131)

摘　　要：正交频分多址接入(OFDMA,Orthogonal Frequency Division Multiple Access)已经成为3G演进策略(LTE,Long Term Evolution)及4G技术的主要多址接入方式.本文研究了现有的OFDMA的切换算法,分析了其存在的不足之处.本文针对OFDMA多址技术特点,提出新型的OFDMA切换算法(SBA,Sub-carriers Bidirectional Arrayed handover).并通过仿真验证新型切换算法的性能.仿真结果表明,新型OFDMA切换算法保证了用户在切换过程中的信道质量(CIR,Carrier-Interference Ratio),减少了切换信道的数目,从而提高了OFDMA系统性能.Orthogonal Frequency Division Multiple Access（OFDMA,Orthogonal Frequency Division Multiple Access）has already been the main multiple access technology for 3G long term evolution（LTE） and 4G.This paper research present OFDMA handover algorithms,and analyses the disadvantages.This paper considers OFDMA multiple access technology characteristic,and puts forward new OFDMA handover algorithm（SBA,Sub-carriers Bidirectional Arrayed handover）.By simulating,the results validate the performance of new handover algorithm.As the results prove,during handover process,new OFDMA handover algorithm guarantees users＇ channel quality（CIR,Carrier-Interference Ratio）,reduces the amount of occupied handover sub-carriers,and improves OFDMA system performance.

关 键 词：OFDMA SBA切换 子载波 CIR 同址干扰 

分 类 号：TN929.53[电子电信—通信与信息系统]