一种抑制MIMO-OFDM峰均比的联合算法  

A union algorithm for PAPR reduction in MIMO-OFDM systems

作　　者：王革思[1] 朱润光[1] 周忠斌[1] 葛磊[1] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《应用科技》2011年第5期43-46,共4页Applied Science and Technology

摘　　要：多输入多输出正交频分复用(MIMO-OFDM)系统的高峰均功率比(PAPR)问题已经成为限制MIMO-OFDM技术应用和发展的主要障碍.针对这种情况提出一种由子块逐次取反(SSI)和循环限幅算法的联合方案,与连续次最优交叉天线旋转取反算法(SS-CARI)相比传输的边带信息更少,克服了概率类算法只能在概率上降低PAPR的缺陷和限幅算法带来的峰值再增长问题.仿真结果表明,此方案可有效抑制峰均功率比,同时不会产生过大的噪声.The problem of high peak-to-average power ratio（PAPR） becomes the main obstruction to apply and develop MIMO-OFDM systems.For this reason a new method combining the subblock successive inversion（SSI） with circle-clipping is proposed.Comparing with the subblock successive cross-antenna rotation and inversion（SS-CARI） it has less side information and overcomes the shortcoming that the probabilistic algorithm can only reduce PAPR in aspect of probability and the problem of peak re-growth which is brought by clipping algorithm.Simulation results show that the scheme can effectively restrain PAPR.Meanwhile,it does not generate excessive noise.

关 键 词：多输入多输出正交频分复用 高峰均功率比 子块逐次取反 循环限幅 边带信息 

分 类 号：TN911[电子电信—通信与信息系统]