本文采用电磁波雷达作为测量设备,解决了现有船舶水尺计重过程中的难题,并结合激光测距仪准确定位,计算出实际吃水深度。同时,利用远距离无线电(Long Range Radio,LoRa)无线通讯技术进行信号传输,利用实验室虚拟仪器工程平台(Laboratory...本文采用电磁波雷达作为测量设备,解决了现有船舶水尺计重过程中的难题,并结合激光测距仪准确定位,计算出实际吃水深度。同时,利用远距离无线电(Long Range Radio,LoRa)无线通讯技术进行信号传输,利用实验室虚拟仪器工程平台(Laboratory Virtual Instrument Engineering Workbench,LabVIEW)虚拟仪器技术进行设备控制,实现长时间、多点同时测量,将得到的数字信号用预设的算法自动筛选出数据,并形成直观图像供检验人员筛选、判断。与传统方法比较,前后尺总体差异小于0.1%,符合计重标准要求,提高了测量准确率,具有较大的推广前景。展开更多
Orthogonal time-frequency space(OTFS)is a new modulation technique proposed in recent years for high Doppler wireless scenes.To solve the parameter estimation problem of the OTFS-integrated radar and communications sy...Orthogonal time-frequency space(OTFS)is a new modulation technique proposed in recent years for high Doppler wireless scenes.To solve the parameter estimation problem of the OTFS-integrated radar and communications system,we propose a parameter estimation method based on sparse reconstruction preprocessing to reduce the computational effort of the traditional weighted subspace fitting(WSF)algorithm.First,an OTFS-integrated echo signal model is constructed.Then,the echo signal is transformed to the time domain to separate the target angle from the range,and the range and angle of the detected target are coarsely estimated by using the sparse reconstruction algorithm.Finally,the WSF algorithm is used to refine the search with the coarse estimate at the center to obtain an accurate estimate.The simulations demonstrate the effectiveness and superiority of the proposed parameterestimation algorithm.展开更多
According the work arrangements and requirements of carried satellite emergency communications, Fujian Meteorological Bureau establishes a satellite emergency communication system for radar stations to meet the needs ...According the work arrangements and requirements of carried satellite emergency communications, Fujian Meteorological Bureau establishes a satellite emergency communication system for radar stations to meet the needs of data transmission under the radar state of emergency. This paper introduces the main construction content, structure diagram, network diagram, drills and emergency communications procedures of the emergency communication system for the province’s meteorological radar satellite and provides the test emergency situation of the province’s meteorological radar-satellite data transmission. Satellite emergency communication system can basically meet the needs of emergency radar data transmission.展开更多
基金supported by the National Natural Science Foundation of China(No.61871203)the Postgraduate Scientific Research and Innovation Projects of Jiangsu Province,China(No.KYCX23_3878)。
文摘Orthogonal time-frequency space(OTFS)is a new modulation technique proposed in recent years for high Doppler wireless scenes.To solve the parameter estimation problem of the OTFS-integrated radar and communications system,we propose a parameter estimation method based on sparse reconstruction preprocessing to reduce the computational effort of the traditional weighted subspace fitting(WSF)algorithm.First,an OTFS-integrated echo signal model is constructed.Then,the echo signal is transformed to the time domain to separate the target angle from the range,and the range and angle of the detected target are coarsely estimated by using the sparse reconstruction algorithm.Finally,the WSF algorithm is used to refine the search with the coarse estimate at the center to obtain an accurate estimate.The simulations demonstrate the effectiveness and superiority of the proposed parameterestimation algorithm.
文摘According the work arrangements and requirements of carried satellite emergency communications, Fujian Meteorological Bureau establishes a satellite emergency communication system for radar stations to meet the needs of data transmission under the radar state of emergency. This paper introduces the main construction content, structure diagram, network diagram, drills and emergency communications procedures of the emergency communication system for the province’s meteorological radar satellite and provides the test emergency situation of the province’s meteorological radar-satellite data transmission. Satellite emergency communication system can basically meet the needs of emergency radar data transmission.
