基于人工免疫的OFDM系统自适应资源分配算法研究  

Adaptive bit and power allocation in OFDM system based on artificial immune algorithm

作　　者：万先亮 周力[1] 

机构地区：[1]南昌航空大学信息与工程学院,江西南昌330063

出　　处：《现代电子技术》2012年第3期96-99,共4页Modern Electronics Technique

摘　　要：针对多用户OFDM系统自适应比特功率分配优化问题,由于信道的时变性,为更好地分配资源,改进了一种人工免疫的OFDM算法,此算法通过抗体与抗原的亲和来消除抗原的原理,由选定种群数量、编码方式,计算亲和度、浓度、激励度,选择免疫体,抗体保护克隆变异保护,克隆变异,克隆抑制,抗体刷新这些步骤达到优化OFDM系统的目的。选定适应度函数,在误比特率和速率一定的情况下,使得总功率最小,即在某个总功率下,速率达到最大。通过和遗传算法、人工鱼群算法进行仿真比较,证明人工免疫算法是最优的。To solve the problem of adaptive bit and power allocation in multi-user OFDM system, an improved artificial immune OFDM algorithm is proposed which through affinity of antibodies and antigens to eliminate the antigen, and from selected population, encoding, affinity calculation, concentration calculation, motivation degrees calculation, immune body selection, antibody protection, clone variation, clone inhibition, antibody refresh to optimize the purpose of OFDM system. Fit- ness function is selected to minimize the total power with certain bit error rate and rate. Compared with genetic algorithm and artificial fish-swarm algorithm, the artificial immune algorithm is optimal by simulation.

关 键 词：正交频分复用 人工免疫 自适应 算法 

分 类 号：TN911-34[电子电信—通信与信息系统]