摘要
基于IEEE 802.16d协议的OFDM传输系统,研究了峰均功率比(PAPR)较高的原因,在现有PARR降低算法的基础上,深入研究了算法之间的最佳联合准则,比较了两种可行的联合算法PTS-Clipping和Clipping-PTS之间的性能差异,得出了算法联合时的最佳级联顺序。Matlab仿真结果表明,PTS-Clipping是较优的联合算法,能够最大限度地利用现有算法的优势,在很好地降低PAPR的同时,又不会引入很大的计算量和限幅噪声。另外,本文得出的最佳联合准则具有通用性,适用于其他PAPR降低算法之间的联合。
The cause of high PAPR in IEEE 802.16d OFDM system is investigated. Based on the existed algorithms to reduce the PAPR, the best Combined Rules and Sequence between algorithms are studied. The performances of two possible combined algorithms （PTS-Clipping and Clipping-PTS） are compared. Simulation results show that PTS-Clipping is the better combined algorithm between the two algorithms. It can reduce the PAPR efficiently, and has lower computational complexity and clipping noise as well. The proposed combined rules can also be applied to other combinations of algorithms.
出处
《电路与系统学报》
CSCD
北大核心
2009年第4期105-110,共6页
Journal of Circuits and Systems
基金
国家自然科学基金项目(60472079)
浙江省自然科学基金重点项目(Z104252)
浙江省科技计划项目(2005C21005)
