OPTIMIZED GRADIENT PROJECTION FOR PAPR REDUCTION OF OFDM SIGNALS

摘要：

In this paper, a new Optimized Gradient Projection (OGP) algorithm is proposed based on Partial Transmit Sequence (PTS) and Active Constellation Extension (ACE) algorithm to reduce Peak-to-Average Power Ratio (PAPR) in Orthogonal Frequency Division Multiplexing (OFDM) system. The improved PTS algorithm using Linear Search Iterative Shift (LSIS) selects the sequence with lowest PAPR to transmit. The output signal of LSIS PTS is set as the input signal of ACE algorithm. ACE uses Gradient Projection (GP) algorithm to reduce the PAPR. A pre-clipping vector in ACE is proposed to decrease the computation. Simulation results show that OGP algorithm can attain a sharp drop of CCDF curve and reduce PAPR to an acceptable level with lower computation complexity.

关键词： OFDM Peak-to-average Power Ratio Optimized Gradient Projection PTS ACE

作者: Hao Luo Li Zhou

作者单位: School of Information Engineering,Nanchang HangKong University, Nanchang 330063, China

会议类型: 国际会议

会议名称: 2011 4th IEEE International Conference on Broadband Network & Multimedia Technology(第四届IEEE宽带网络与多媒体国际会议 4th IEEE IC-BNMT2011)

会议地点: 深圳

会议语种:英文

页码: 118-121

在线出版日期: 2011-10-28（万方平台首次上网日期，不代表论文的发表时间）