OFDM吞吐量最大化自适应分配算法  

An Adaptive Allocation Algorithm for Maximization Throughput of OFDM Systems

作　　者：苏敏[1] 覃团发[1] 陈跃波[1] 

机构地区：[1]广西大学计算机与电子信息学院,广西南宁530004

出　　处：《无线电通信技术》2007年第4期17-20,共4页Radio Communications Technology

基　　金：国家自然科学基金委员会资助项目(60642007)

摘　　要：基于信噪比(SNR)门限的OFDM自适应分配算法在达到系统传输质量要求时,各子载波的信噪比都具有一定的裕量,在发送端该裕量可等效为功率裕量。研究了该功率裕量在各子载波上的分配,并在基于SNR门限的OFDM自适应分配算法的基础上提出了一种改进算法。仿真结果表明,改进算法与原算法的BER性能相当,且可明显提高系统的吞吐量。在遵循IEEE802.11a标准的OFDM系统中,改进算法的吞吐量平均比原算法提高了0.5bit/子载波。When Signal-Noise Ratio （SNR）Threshold Adaptive OFDM Allocating Algorithm is adopted, there is some SNR margin in subearrier with the quality of transmission guaranteed, The margin is equivalent to power margin on the transmitter. In this paper, the allocation of the power margin to each subcarrier is studied and an improved algorithm based on SNR threshold adaptive OFDM allocating algorithm is proposed.The result of simulation indicates adopting the proposed algorithm the throughput of system increases markedly with the BER performance remains the same as the original algorithm＇ s. In the OFDM system for IEEES02,11a, the throughput of system increased by 0. 5 bit/subcarrier averagely,

关 键 词：AOFDM 功率裕量 比特功率分配 吞吐量 

分 类 号：TN929.5[电子电信—通信与信息系统]