降低FBMC-OQAM系统中PAPR的GA-IBPSO算法  

GA-IBPSO Algorithm for PAPR Reduction in FBMC-OQAM Systems

作　　者：朱海云 马天鸣 江潇潇[1] 王春媛 ZHU Hai-yun;MA Tian-ming;JIANG Xiao-xiao;WANG Chun-yuan(School of Electrical and Electronic Engineering,Shanghai University of Engineering Science,Shanghai 201620,China)

机构地区：[1]上海工程技术大学电子电气工程学院,上海201620

出　　处：《小型微型计算机系统》2023年第5期1069-1074,共6页Journal of Chinese Computer Systems

基　　金：国家自然科学基金项目(61601296,61701295,61801286)资助;上海工程技术大学研究生科研创新项目(20KY0210)资助.

摘　　要：针对目前采用偏移正交幅度调制方式下的滤波器组多载波(Filter Bank Multi-Carrier Offset Quadrature Amplitude Modulation, FBMC-OQAM)技术具有峰均比(Peak-to-Average Power Ratio, PAPR)较高的缺点,设计了一种改进的离散二进制粒子群优化的遗传算法(Genetic Algorithm-Improved Binary Particle Swarm Optimization, GA-IBPSO).它选用带外衰减性能更好的原型滤波器代替原有的PHYDAYS来提高抑制效果,同时采用双层部分传输序列(Bilayer Partial Transfer Sequence, BPTS)的思想将临时存储的单层相位因子搜索结构转换成双层结构以扩大搜索范围,并融入遗传算法(Genetic Algorithm, GA)中的交叉、变异操作来进一步降低所得到的次优相位因子序列的计算复杂度.通过理论分析和仿真实验发现,相对于BPSO算法,GA-IBPSO算法通过计算量的略微增加获得了更好的PAPR抑制性能.For the problem of high Peak-to-Average Power Ratio(PAPR)of Filter Bank Multi-Carrier(FBMC)Systems with Offset Quadrature Amplitude Modulation(OQAM),a Genetic Algorithm-Improved Binary Particle Swarm Optimization(GA-IBPSO)is proposed.It uses a prototype filter with better out-of-band attenuation performance to replace the original PHYDAYS to improve the suppression effect.Meanwhile,a Bilayer Partial Transfer Sequence(BPTS)is adopted to expand the search range,which transforms the temporarily stored single-layer phase factor search structure into a two-layer structure.In addition,crosscutting and mutation operations of the Genetic Algorithm(GA)are integrated to further reduce the computational complexity of the obtained suboptimal phase factor sequence.Through analysis and experiments results found that the algorithm achieves better PAPR suppression performance by slightly increasing the amount of computation compared with BPSO algorithm.

关 键 词：滤波器组多载波 偏移正交调幅调制 峰均比 部分传输序列 粒子群优化算法 

分 类 号：TN92[电子电信—通信与信息系统]