摘要4G已经走入我们的生活，正交频分复用(Orthogonal frequency pision multiplexing, OFDM)技术是 4G 技术的核心技术。OFDM 技术抗符号间干扰能力强、传输速率高频带利用率高。OFDM技术应用前景广泛，国内外学者对OFDM技术的研究一直没停止过。 OFDM 系统不可避免地会产生高峰均比值，高 PAPR 产生，会使功率放大器的动态范围超出限制，信号会产生非线性的失真，不仅会对增加数模和模数转换的复杂程度，提高功率放大器的要求，更会产生一系列的干扰和信号的畸变，降低了系统的精确性。 当前解决 OFDM系统高 PAPR的方法可以分为三类：信号预畸变技术、概率类技术和编码技术。本论文重点分析了编码技术，编码技术使用的典型码组有分组码、格雷码和雷德密勒码。30484
毕业论文关键词 正交频分复用，峰均功率比，信号预畸变技术，概率类技术，编码技术
Title Study of the coding technology of OFDM signal PAPR
Abstract 4G has come into our life, frequency pision multiplexing (OFDM) is the core technology of 4G technology. OFDM technology is a powerful anti-jamming capability, high transmission rate of high frequency with high utilization rate. OFDM technology is widely used, domestic and foreign scholars have not stopped the research of OFDM technology. OFDM system will inevitably produce high peak to average ratio, high PAPR, the power amplifier dynamic range exceeds the limit, the signal will produce nonlinear distortion will not only to increase the A / D and D / A conversion of the complexity and improve the requirements of the power amplifier, it will produce a series of interference and signal distortion, reduce the accuracy of the system. At present, the method of solving the high OFDM of PAPR system can be pided into three kinds: signal pre-distortion technology, probability technology and coding technology. This paper focuses on the analysis of coding technology. The typical code coding group includes Block code, Golay code and Reed-Muller code.
Keywords OFDM, PAPR, signal pre-distortion technology, probability technique, coding technique
目次
1绪论1
1.1无线通信概述1
1.2研究背景及意义2
1.3论文主要安排2
2OFDM系统概述4
2.1OFDM技术.4
2.2OFDM信号的产生.5
2.3OFDM的系统7
2.4OFDM系统的关键技术9
2.4.1同步技术9
2.4.2信道估计技术10
2.4.3降低峰均比的技术10
2.4.4其它相关技术10
2.5OFDM技术优缺点11
3OFDM系统中的峰均功率比13
3.1峰均功率比定义13
3.2高峰均功率比对系统的影响14
3.3降低峰均功率比的非编码类技术14
3.3.1信号预畸变技术15
3.3.2概率类技术18
3.4小结20
4降低峰均功率比的编码技术.21
4.1分组编码调制(BLOCKCODINGMODULATION，BCM).21
4.1.1分组编码调制原理.21
4.1.2分组编码调制方案性能分析.24
4.2格雷互补序列(GOLAYCOMPLEMENTSERIES).24
4.2.1格雷互补序列原理.24
4.2.2格雷互补序列方案性能分析.25
4.3雷德密勒码(REED-MULLER，RM).26
4.3.1雷德密勒码原理.26
4.3.2雷德密勒码方案性能分析.27
4.4小结27
总结28
致谢29
参考文献30
1 绪论 1.1 降低OFDM信号PAPR的编码技术研究:http://www.751com.cn/tongxin/lunwen_26210.html