802.15.4z协议LRP UWB通导融合信号体制研究与分析  

Research and analysis of 802.15.4z protocol LRP UWB pass-through fusion signal regime

作　　者：李建佳 鲍亚川 蔚保国[1] Li Jianjia;Bao Yachuan;Yu Baoguo(State Key Laboratory of Satellite Navigation System and Equipment Technology,The 54th Research Institute of China Electronics Technology Group Corporation,Shijiazhuang 050081,China)

机构地区：[1]中国电子科技集团公司第五十四研究所,卫星导航系统与装备技术国家重点实验室,石家庄050081

出　　处：《电子测量技术》2021年第19期95-102,共8页Electronic Measurement Technology

摘　　要：针对IEEE最新发布的802.15.4z协议的超宽带(UWB)物理层改动进行了分析,并基于MATLAB设计了低频脉冲超宽带(LRP UWB)3种工作模式以及高频脉冲超宽带(HRP UWB)的通信测距一体化系统,并在802.15.4的CM1信道条件下仿真对比了各个系统的误码率(BER)和测距精度来分析不同工作模式下的UWB系统性能特点。误码率仿真结果为LRP UWB低于HRP UWB,而LRP长程模式误码最低,在信噪比15以上为10^(-4),说明长程模式的通信链路最稳定。测距仿真结果表明LRP UWB系统3种模式在20 m以内近距离测距性能上具有与HRP UWB系统精度相当,均为0.1 m;而LRP UWB长程模式在100 m以上的远距离测距精度优于0.1 m,其他几种模式精度均在0.5 m以上,说明长程模式更加适合用于远距离测距。最后设计并仿真了脉冲累积测距系统的测距能力,其100 m距离以上测距精度优于0.4 m,为长程模式单脉冲测距精度的2倍以上,说明使用脉冲累积测距技术可以进一步提升系统远距离测距能力。Analyzed the changes to the ultra-wide band(UWB)physical layer of the latest IEEE 802.15.4 z protocol,and designed three types of low frequency pulse ultra-wide band(LRP UWB)based on MATLAB working mode and high-frequency pulse ultra-wide band(HRP UWB)communication ranging integrated system,and under the conditions of 802.15.4 CM1 channel simulation and comparison of the bit error rate of each system(BER)and ranging accuracy to analyze the UWB system performance characteristics under different operating modes.The bit error rate simulation result is that LRP UWB is lower than HRP UWB,and the LRP long-range mode has the lowest bit error,and the signal-to-noise ratio is 10;above 15,indicating that the long-range mode communication link is the most stable.The range simulation results show that the three modes of the LRP UWB system are comparable to the HRP UWB system in terms of range performance within 20 m,with an accuracy of 0.1 m,while the LRP UWB long-range mode has a better range accuracy than 0.1 m over 100 m,and the other modes have an accuracy of 0.5 m or more,indicating that the long-range mode is more suitable for long-range range.Finally,the range measurement capability of the pulse accumulation ranging system was designed and simulated,and its range accuracy was better than 0.4 m over a distance of 100 m,which is more than twice the accuracy of a single pulse in long-range mode,indicating that the use of pulse accumulation ranging technology can further improve the system′s long-range range measurement capability.

关 键 词：超宽带 802.15.4z BPM-BPSK PPM OOK 测距 

分 类 号：TN914.2[电子电信—通信与信息系统]