机载共形阵通道幅相误差实时预测算法  

Real-time Calibration Algorithm for Amplitude and Phase Errors of Airborne Conformal Array Channels

作　　者：杨永舟 吕旭宁 何锋[1] 付嘉俊 方宸 YANG Yongzhou;LYU Xuning;HE Feng;FU Jiajun;FANG Chen(School of Electronics and Information Engineering,Beijing University of Aeronautics and Astronautics,Beijing 100191 China;School of Intergated Circuits and Electronics,Beijing Institute of Technology,Beijing 100081 China;Shen Yuan Honors College of Beihang University,Beijing 100191 China)

机构地区：[1]北京航空航天大学电子信息工程学院,北京100191 [2]北京理工大学集成电路与电子学院,北京100081 [3]北京航空航天大学高等理工学院,北京100191

出　　处：《西华大学学报（自然科学版）》2024年第6期27-32,共6页Journal of Xihua University:Natural Science Edition

基　　金：国防基金项目(2019-JJ-246)。

摘　　要：针对飞行器高速机动时机体剧烈震颤引起的阵列失配等问题,提出一种快速通道预测算法,以提高阵列波束形成的鲁棒性。首先分析飞行器在高速震颤产生误差扰动的情况下,机载共形弧阵波束图的畸变程度,并假设通道幅度和相位误差随机,给出两类误差的预测算法。由于预测校准算法需结合共形阵背景下的接收阵列信号模型,因此给出具体的阵列稳健性判定依据,以阵元标定误差和幅相误差进行性能分析。然后提出一种基于标准校准元技术的共形阵误差预测算法,该算法不仅可以在阵列设计之初用于阵列校准,也可以在实际使用中进行通道修正。最后根据3个校准元对空间分布阵列进行误差预测。该误差预测算法在阵元间距为10cm的阵列中,对5 mm的随机抖动有较好预测,其中单次预测最多偏离实际误差1 mm,并且使用误差预测值可以直接部署于基带部分进行实时校准,校准精度在准确值的2 mm内,具有较高的实时误差校正能力。In view of the array mismatch caused by the severe tremor of the aircraft at high speed,a fast channel prediction and calibration algorithm are presented to improve the array beamforming robust-ness.In this study,we first analyzed the degree of distortion of the airborne conformal arc array beam pat-tern under certain error perturbations.And assumed random channel amplitude and phase errors,the predic-tion and calibration algorithms for both types of errors were given.The prediction and calibration al-gorithms need to be combined with the received array signal model in the context of the conformal array,and specific array robustness determination basis was given to analyze the performance in terms of array element calibration error and amplitude and phase error.Then a conformal array error prediction algorithm based on the standard calibration element technique is proposed,which can be used not only for array calib-ration at the beginning of array design,but also for channel correction in the actual use.Finally the al-gorithm can perform error prediction for spatially distributed arrays based on three calibration elements,and the error prediction values can be directly deployed in the baseband section for real-time calibration.In an array with a spacing of 10 elements,there is a good prediction for random jitter of 5,among which a single prediction deviates most from the actual error.And the use of error prediction values can be directly de-ployed in the baseband section for real-time calibration,with a calibration accuracy of within 2 accuracy values and high real-time error correction ability.

关 键 词：共形阵 阵列校准 通道误差 阵列失配 通道预测 通道校准 

分 类 号：TN959.73[电子电信—信号与信息处理]