“一点对多点”测控系统峰均比抑制技术  

“Point to Multipoint” Measurement and Control System Peak-to-Average Ratio Suppression Technique

作　　者：骆希 黄荣鑫 颜宏 张舟 LUO Xi;HUANG Rong-xin;YAN Hong;ZHANG Zhou(Chongqing Jinmei Communication Ltd.,Chongqing 400030,China)

机构地区：[1]重庆金美通信有限责任公司,重庆400030

出　　处：《通信技术》2018年第4期778-781,共4页Communications Technology

摘　　要：针对"一点对多点"测控系统的高峰均比波形特性,设计适于工程应用的高效的峰均比抑制技术。算法通过FPGA芯片进行硬件电路设计,具有低处理延时、低资源消耗、削波后带外抑制度高等优点。基于时域的脉冲抵消原理,检测并锁定波形峰值,缩放脉冲抵消器的输出幅值,通过时域相减降低信号峰均比。此削波方案可广泛适用于OFDM、载波聚合、复合调制多种波形。峰均比抑制可降低对射频功放线性度的设计要求,提高功放效率,降低设备功耗,增加系统传输增益。Based on the peak-to-average waveform characteristics of the"point to multipoint"measurement and control system,an efficient peak-to-average ratio suppression technique suitable for engineering applications is designed.The algorithm implements the hardware circuit design through the FPGA chip,which has the advantages of low processing delay,low resource consumption,and high out-of-band rejection after clipping.Based on the principle of pulse cancellation in the time domain,the peak value of the waveform is detected and locked,the output amplitude of the pulse canceller is scaled,and the peak-to-average ratio of the signal is reduced by time domain subtraction.This clipping scheme can be widely applied to a variety of waveforms such as OFDM,carrier aggregation,and complex modulation.The peak-to-average ratio rejection can reduce the design requirements for radio frequency power amplifier linearity,improve power amplifier efficiency,reduce equipment power consumption,and increase system transmission gain.

关 键 词：测控系统 峰均比 载波聚合 功放效率 

分 类 号：TN914[电子电信—通信与信息系统]