中文说明：应用背景较高的峰值平均功率比（PAPR）是一个主要的缺点在 ；正交频分复用（OFDM）。高PAPR增加 ；模拟到数字的复杂性（A/D）和数模（D/A）转换器和 ；也降低了效率的射频功率放大器（HPA）。在本文中我们提出了 ；离散Hartley变换（DHT）分析预编码的OFDM系统采用M-QAM（m = 16，32，64，256）。我们比较了DHT预计算机仿真结果与DFT预编码的OFDM系统编码的OFDM系统，沃尔什-哈达玛变换（WHT）预编码的OFDM系统，和选择映射（SLM）基于OFDMOFDM系统和常规。关键技术降低PAPR的方法几种降低PAPR的技术已在文献中提出的。这些技术被分为2组，信号加扰技术和信号失真技术，这是下面给出：一种信号加扰技术块编码技术有纠错的块编码方案•选择映射（SLM）•部分传输序列（PTS）交织技术•音预订（TR）•音注（TI）信号失真技术•峰值加窗包络缩放峰还原载体剪裁和过滤–提出定量研究PAPR和NL失真–模拟采用这些技术的OFDM系统
English Description：
Application backgroundHigh Peak to Average Power Ratio (PAPR) is one of the major drawbacks in Orthogonal Frequency Division Multiplexing (OFDM). The High PAPR increases the complexity of Analogue to Digital (A/D) and Digital to Analogue (D/A) convertors and also reduces the efficiency of RF High Power Amplifier (HPA). In this paper we present an analysis of Discrete Hartley Transform (DHT) pre coded OFDM system using M-QAM (where M=16, 32, 64, 256). We compare the computer simulation results of DHT pre-coded OFDM system with DFT pre coded OFDM system, Walsh Hadamard Transform (WHT) pre coded OFDM system, and Selected Mapping (SLM) based OFDM system and OFDM conventional.Key TechnologyPAPR-reduction techniques Several PAPR reduction techniques have been proposed in the literature. These techniques are divided into two groups - signal scrambling techniques and signal distortion techniques w