针对MR-OFDM波形的降峰均比机制研究  

Research on PAPR Reduction Mechanism for MR-OFDM Waveform

作　　者：赵哲 高岳达 牛虹 鲁虎雄 ZHAO Zhe;GAO Yueda;NIU Hong;LU Huxiong(Power Marketing Service&Operation Management Branch,Inner Mongolia Power(Group)Co.,Ltd.,Hohhot 010000,China)

机构地区：[1]内蒙古电力(集团)有限责任公司电力营销服务与运营管理分公司,内蒙古呼和浩特010000

出　　处：《自动化仪表》2022年第6期47-53,共7页Process Automation Instrumentation

基　　金：内蒙古电力公司科技计划基金资助项目([2020]29-13)。

摘　　要：针对IEEE 802.15.4g标准的多速率多区域正交频分复用(MR-OFDM)波形,提出了一种通过对加扰种子优化选择来降低发送信号峰均比(PAPR)的机制。其充分利用了发送信号的帧格式,在业务负荷信号的产生过程中引入加扰种子的优化选择机制,从而改善了发射信号的PAPR性能。和传统降PAPR算法相比,新算法无需对标准内容进行任何变动,在发送端仅需少量修改现有信号处理流程,而在接收端则无需任何修改,从而实现对大量已部署产品的通信兼容。理论分析和仿真结果表明,优化算法不影响传输速率,且计算复杂度低,不同参数OFDM信号的互补累积分布函数在10^(-4)数值处减少了约2~2.6 dB,取得了较好的降峰均比值性能。另外,相关机制经过适当修改后可以应用于其他同类型的物联网OFDM通信标准中。For the multi-rate and multi-regional orthogonal frequency division multiplexing(MR-OFDM)waveform in IEEE 802.15.4g standard,a peak to average power ratio(PAPR)reduction mechanism of the transmitted signal is proposed by optimizing the scrambling seed selection.By taking advantage of that full use of the frame format of the transmitted signal,the PAPR performance of the transmitted signal is improved by means of introducing scrambling seed optimization selection mechanism in the process of generating the traffic load signal.Compared with the traditional PAPR algorithm,no change is needed for the algorithm of the standard content.Only a few revise to the existing signal processing flow is required at the sender,and no revise is needed at the receiver,so as to realize the communication compatibility of a large number of deployed products.Theoretical analysis and simulation results show that the optimized algorithm does not affect the transmission rate.And the computational complexity is low.The complementary cumulative distribution function of the OFDM signal with different parameters is reduced by about 2~2.6 dB at 10^(-4),and a good PAPR reduction effect is obtained.

关 键 词：IEEE 802.15.4g 峰均比 加扰种子 互补累积分布函数 多速率多区域正交频分复用波形 物联网 通信标准 

分 类 号：TH-69[机械工程]