毕业论文-OFDM系统峰均比抑制技术的仿真研究详细分解.doc

毕业设计（论文） OFDM系统峰均比抑制技术的仿真研究 院 别 专 班级姓名 指导教师 2013年6月9日 OFDM系统峰均比抑制技术的仿真研究 摘要 关键字：  The Simulation of the Reduction of PAPR in OFDM system Author： Tutor：Abstract OFDM (orthogonal frequency division multiplexing) is regarded as the core technology of 4G wireless communication system in the future. It transmits information through orthogonal multiple sub-carriers. It is also adaptive to high-rate data transmission and multimedia data transmission. However, it has high peak-to-average power ratio (PAPR), which is its inherent disadvantage. OFDM technique is introduced in this paper which used to produce the purpose and significance, and its development today. Focus on analysis of the current used to reduce the PAPR of OFDM signal four ways, namely, the signal pre-distortion technology, block coding technique, high-speed coding and matrix transformation, it also analyzes the high-rate coding method, partial transmit sequence (PTS) and selective mapping (SLM) these two methods. Through its simulation and comparison which has been the complexity of PTS is a high PAPR reduced OFDM system, the conclusions of the method. A method of reducing the complexity of PTS-m sequence of PTS method is presented in this paper. Through the theoretical analysis and the design of MATLAB simulation of four methods to reduce the advantages and disadvantages of OFDM system, Final analysis of a proposed reduction method of PTS-m complex sequence of PTS method. Simulation results show m sequence PTS method can not only reduce the complexity, but also reduce the PAPR system. Key Words: OFDM (orthogonal frequency division multiplexing), PAPR (peak-average power ratio), partial transmit sequence, m-sequence目 录 1 绪 论 1 1.1 课题背景 1 1.2 OFDM系统的主要优缺点 2 1.3 降低OFDM系统峰均比的研究现状 3 1.4 本章小结 4 2 OFDM系统的原理及其峰均比的定义 5 2.1