【作者】 刘凯；

【导师】 陈伟建；

【作者基本信息】 电子科技大学 ， 通信与信息系统， 2018， 硕士

【摘要】 近年来,随着无线与移动通信技术的发展,波达方向(Direction of Arrival,DOA)探测技术在其中扮演的角色越来越重要,作为智能天线技术的主要技术之一,其基本原理为通过阵列接收和发射的方式实现不同用户方向上的窄波束定向通信,以此来提高接收灵敏度及通信的效率,减小用户之间的干扰,提高通信系统的容量。作为智能天线技术的核心技术,波达方向探测的精度和分辨率直接影响着智能天线技术在实际接收和发射时的工作效率。智能天线系统一般分为模拟型、数字型和混合型,本文针对该技术,深入学习了该技术原理并且设计出了一套混合型DOA探测接收的实验平台,即采用模拟和数字、硬件和软件相结合的方式,来提高DOA探测的精度,以满足第五代(5th Generation,5G)移动通信三维多入多出(Three Dimension Multiple-Input MultipleOutput,3D MIMO)系统的高精度定位要求,提高系统容量。该平台分为2个主要功能模块:DOA接收探测和数字波束形成,二者均采用8通道方式,工作在5.8GHz频段,融合了定位与收发功能,应用于5G系统中的通信定位。主要工作内容如下:1.深入研究学习了阵列接收,尤其是智能天线技术的原理,根据其技术特点,分析出器件相位精度和DOA探测性能的相互关系,对波束形成原理及性能影响因素进行理论分析,并得出相关结论。2.根据DOA探测和波束形成原理,设计出接收机和波束形成硬件系统方案,然后对方案进行仿真,分析其有效性和可行性并加以改进、完善,最终得出切实可行的设计方案。3.根据已设计出的方案,选择合适的元器件,同时由现有器件对方案进行微调,保证初始方案的可实现性,经过反复调整后得到最终方案,最后完成系统的原理图和PCB设计、布板和加工。4.最后,分别对各个模块进行硬件调试和测试,保证各个模块能够正常工作,然后对整个系统进行联合调试和测试,验证该系统的性能。更多还原

【Abstract】 The detection technology of the direction of arrival(DOA)has been playing a more and more important role in recent years,with the development of wireless and mobile communication technology.As one of the main technologies of smart antennas technology,Its fundamental principle is to use phased array in both receiving and transmitting,achieving the communication in different directions of different users through narrow beam.In this way,we can improve the sensitivity of reception and efficiency of communication,decrease the multiple access interference and increase the capacity of the communication system.Although the way of array receiving and transmitting increases the array elements and components used,these costs are relatively small and acceptable to its advantages.As the core technology of smart antenna technology,the accuracy and resolution of DOA detection directly affect the efficiency of smart antenna technology in practical application.Smart antenna systems are generally divided into analog,digital and hybrid systems.In view of the technology,the fundamental principle of DOA detection is been learnt and studied in depth in this thesis and a set of hybrid experimental platform for DOA detection is designed,which means the combination of analog and digital,hardware and software,and in this way,the accuracy of DOA detection can be improved to meet the high precision positioning requirements of the fifth generation mobile communication 3D MIMO system and improve the system capacity.The platform is divided into 2 main functional modules: DOA detection and beamforming,both using 8 channel,working in the 5.8GHz band and,fusion location and transceiverfunction,is designed to apply to 5G system for communication location.The main contents of the work are as follows:1.The array receiving,especially the principle of smart antenna technology,is learned and studied in depth.According to its technical characteristics,the relationship between phase precision of phase shifter and DOA detection performance is analyzed.An analysis of the principle of beam-forming and influence factor of its performance is done and relevant conclusions are given.2.According to the principle of DOA detection and beam-forming,the hardware system scheme of receiver and beam-former is designed,followed by simulation and analysis of effectiveness and feasibility to make the scheme improved.3.According to the proposed scheme,the appropriate devices are selected and also the scheme is adjusted slightly according to existing components,ensuring the feasibility of the initial plan,and getting the final plan after repeated adjustment.Finally,the circuit diagram and PCB layout are implemented and machined.4.Finally,the hardware debugging and testing of each module are carried out to ensure that each module can work properly,and then the whole system is tested jointly to verify the performance of the system.更多还原