基于能量加权算法的高精度伪码测距机载无线电高度表设计  

Design of high precision airborne radio altimeter with pseudo-code ranging based on energy weighting algorithm

作　　者：白迪 毕小妍 陈锟[1] 鲁楠君 BAI Di;BI Xiaoyan;CHEN Kun;LU Nanjun(College of Electronics and Information Engineering,South-Central Minzu University,Wuhan 430074,China;Hubei Key Laboratory of Intelligent Wireless Communications,South-Central Minzu University,Wuhan 430074,China;Experimental Teaching and Engineering Training Center,South-Central Minzu University,Wuhan 430074,China)

机构地区：[1]中南民族大学电子信息工程学院,湖北武汉430074 [2]中南民族大学智能无线通信湖北省重点实验室,湖北武汉430074 [3]中南民族大学实验教学与工程训练中心,湖北武汉430074

出　　处：《实验技术与管理》2022年第8期38-44,共7页Experimental Technology and Management

基　　金：中南民族大学教学研究项目(JYX20069);服务产业需求的民族院校集成电路专业建设探索与实践(E-DZYQ20201422)。

摘　　要：机载无线电高度表是军、民用航空器上必不可少的辅助导航设备,对于战术动作、巡航地形匹配、低空飞行等具有重要意义。针对现有体制无线电高度表存在的测高精度低、功耗大、抗干扰能力差等问题,论文提出了一种对匹配滤波器输出畸变波形实施能量加权算法的高精度伪码测距机载无线电高度表设计方案。系统硬件由集成FPGA与多核ARM的ZYNQMP芯以及宽带射频集成芯片ADRV9009构成,在提高运算能力和探测分辨率的同时,功耗和体积均降低一半以上;然后采用高性能Frank伪码序列、能量加权超分辨算法以及卡尔曼跟踪滤波等算法提高综合探测分辨率;最后通过实验对该文所设计的无线电高度表进行了功能和性能两方面的验证,实验结果表明:所设计的无线电高度表功能完善、集成度高、探测准确,实测探测精度误差小于0.1m,优于军标0.5 m的要求。Airborne radio altimeter is an indispensable navigation aid equipment for military and civil aircraft,which is of great significance for tactical action, cruise terrain matching, low altitude flight and so on. The existing radio altimeter system has low precision, high power consumption and poor anti-jamming ability. In view of this, a design scheme of high precision pseudo-code ranging airborne radio altimeter which implements the energy weighting algorithm for the matched filter output distortion waveform is proposed in this paper. The system hardware consists of the ZYNQMP chip, which integrates FPGA and multi-core ARM, and the broadband RF integrated chip ADRV9009. The computing power and detection resolution are improved while the power consumption and volume are reduced by more than half. Then, high-performance Frank pseudo code sequence,energy weighted super-resolution algorithm and Kalman tracking filtering are used to further improve the comprehensive detection accuracy. Finally, the function and performance of the radio altimeter designed in this paper are verified through experiments. The experimental results show that the designed radio altimeter has perfect functions, high integration and accurate detection, and the measured detection accuracy error is less than 0.1 m,which is better than the military standard requirement of 0.5 m.

关 键 词：无线电高度表 测距精度 ZYNQMP Frank序列 能量加权 

分 类 号：TN98[电子电信—信息与通信工程]