摘要
针对正交频分复用(orthogonal frequency division multiplexing,OFDM)系统峰值平均功率比(peak average power ratio,PAPR)大的问题,提出了降低PAPR的联合算法。该算法在改进的部分传输序列(part transmission sequences,PTS)算法的基础上,加入压扩技术。联合算法在不增加系统复杂度的情况下,可有效地减小OFDM系统的PAPR。仿真结果表明:当子载波分组数为16、随机分组方式、4倍过采样、内层分组数为4、CCDF(complementary cumulative distribution function)为10-3时,联合算法与传统的PTS算法相比,PAPR减小了4.8 dB。
Aimed at the problems of larger peak average power ratio （PAPR） in orthogonal frequency division multiplexing （OFDM） system, a union algorithm was designed to reduce PAPR. It was based on the improvement of part transmission se- quences （PTS） algorithm,and compression and expansion technology was employed. Union algorithm did not increase the complexity of system, while effectively reduced the PAPR of OFDM system. The simulation results show that comparison union algorithm and the traditional PTS algorithm, the PAPR of union algorithm reduced 4.8 dB, when the subcarrier utilized random grouping and group number is 16,4 times oversampling, inner packet number is 4, complementary cumulative distribution function is 10-3.
出处
《武汉理工大学学报（信息与管理工程版）》
CAS
2013年第2期153-156,共4页
Journal of Wuhan University of Technology：Information & Management Engineering
基金
国家自然科学基金资助项目(61177066)
吉林大学大学生创新训练计划基金资助项目(2012530)
