In this paper, we consider the channel EstimATion problem in Millimeter wave (mmWave) wireless systems with large antenna arrays. By exploiting the inherent sparse nature of the mmWave channel, we develop a novel rate-adaptive channel EstimATion (RACE) algorithm, which can adaptively adjust the number of required channel measurements based on an expected probability of EstimATion error (PEE).
标签： EstimATion Millimeter Adaptive Approach Channel Systems Rate MIMO Wave for
上传时间： 2020-05-26
上传用户：shancjb
在航电系统维护过程中，为解决定位故障的效率和降低维修成本等问题，提出了基于ICD（Interface Control Document，接口控制文件）的1553B总线的信息监控系统模型。该系统运用数据采集卡对总线中传输的信号有无失真、偏差等电气特性进行检测，并使用1553B通讯卡通过测控软件LabWindows/CVI编程与ICD数据库的动态链接，实现总线信息的解析和故障的判断。与传统的维护过程相比，这种模型能够从信号的电气特性以及信息的解析等全方位的去检测判断故障的来源，并且能够广泛在其他1553B总线系统内扩展应用。验证表明该监控系统可以对总线信息进行快速有效地监测分析，能满足应用需求。 Abstract: In the process of avionics system maintenance， to solve the problems such as improving the efficiency of fast orientation to troubles and reducing maintenance cost， system of 1553B bus information monitor model based on ICD was proposed. The system observed whether the data which transmitted on the bus appear distortion and deviation by using data acquisition card. And using 1553B communication card programming of the measure software LabWindows/CVI and the dynamic linking of ICD database， message analysis and fault EstimATion could be realized. Compared with traditional maintenance， this model can all-dimensionally detect and analyze the source of faults from both electrical characteristics of the signal and message analysis， and it can be widely applied in the other 1553B system. Experiment shown that this monitor system can effectively detect and analyze the bus message and can meet the application requirements.
上传时间： 2013-11-23
上传用户：18752787361
为了提高直接转矩控制（DTC）系统定子磁链估计精度，降低电流、电压测量的随机误差，提出了一种基于扩展卡尔曼滤波（EKF）实现异步电机转子位置和速度估计的方法。扩展卡尔曼滤波器是建立在基于旋转坐标系下由定子电流、电压、转子转速和其它电机参量所构成的电机模型上，将定子电流、定子磁链、转速和转子角位置作为状态变量，定子电压为输入变量，定子电流为输出变量，通过对磁链和转速的闭环控制提高定子磁链的估计精度，实现了异步电机的无速度传感器直接转矩控制策略，仿真结果验证了该方法的可行性,提高了直接转矩的控制性能。 Abstract: In order to improve the Direct Torque Control（DTC） system of stator flux EstimATion accuracy and reduce the current， voltage measurement of random error， a novel method to estimate the speed and rotor position of asynchronous motor based on extended Kalman filter was introduced. EKF was based on d-p axis motor and other motor parameters （state vector: stator current， stator flux linkage， rotor angular speed and position； input: stator voltage； output: staror current). EKF was designed for stator flux and rotor speed EstimATion in close-loop control. It can improve the estimated accuracy of stator flux. It is possible to estimate the speed and rotor position and implement asynchronous motor drives without position and speed sensors. The simulation results show it is efficient and improves the control performance.
上传时间： 2015-01-02
上传用户：qingdou
ABAQUS is a general purpose finite element analysis program which is widely used to analyses mechanical, structure and civil engineering problems. Abaqus has some special feature for analysing fracture mechanics problems, and therefore it is a main tools for the FE-analysis in the Fracture Group at the Mechanical Engineering at Glasgow Universtity. The software which can transfer data from Abaqus into a Matlab readable environment has been developed as a part of a research program in Constraint EstimATion in Fracture Mechanics. This research program was funded by a grant from the Defence Research Agency through Prof. J. Sumpter.
标签： analysis analyses general element
上传时间： 2015-05-13
上传用户：xfbs821
This Program Is Designed To Simulate A Spatial Antenna Array System Working On The MUSIC Algorithm For The Angle Of Arrival EstimATion And Null Steering Algorithm For The Weights EstimATion To The Required Output Radiation Pattern .
标签： Designed Algorith Simulate Program
上传时间： 2014-01-02
上传用户：三人用菜
HMM(Hidden Markov Model)，狀態數目N=3，觀察符號數目M=2，時間長度T=3。 (a) Probability Evaluation: 給定狀態轉換機率A、狀態符號觀察機率B、和起始機率 ，求觀察序列 出現的機率。 (b) Optimal State Sequence: 給定狀態轉換機率A、狀態符號觀察機率B、起始機率 、和觀察序列 ，求一個狀態序列 使得O出現的機率最大。 (c) Parameter EstimATion: 給定狀態轉換機率A、狀態符號觀察機率B、起始機率 、和觀察序列 ，求新的A、B、 ，使得O出現的機率最大。
上传时间： 2014-08-28
上传用户：heart520beat
ReBEL is a Matlabtoolkit of functions and scripts, designed to facilitate sequential Bayesian inference (EstimATion) in general state space models. This software consolidates research on new methods for recursive Bayesian EstimATion and Kalman filtering by Rudolph van der Merwe and Eric A. Wan. The code is developed and maintained by Rudolph van der Merwe at the OGI School of Science & Engineering at OHSU (Oregon Health & Science University).
标签： Matlabtoolkit facilitate sequential functions
上传时间： 2015-08-31
上传用户：皇族传媒
ICA/BSS for Wireless Communication first-Order Differential Beamforming and Joint-Process EstimATion for Spatial Source Separation 一篇论文.
标签： Communication Joint-Process Differential Beamforming
上传时间： 2013-12-05
上传用户：Shaikh
Knowledge of the process noise covariance matrix is essential for the application of Kalman filtering. However, it is usually a difficult task to obtain an explicit expression of for large time varying systems. This paper looks at an adaptive Kalman filter method for dynamic harmonic state EstimATion and harmonic injection tracking.
标签： application covariance Knowledge essential
上传时间： 2014-01-19
上传用户：litianchu
A new blind adaptive multiuser detection scheme based on a hybrid of Kalman filter and subspace EstimATion is proposed. It is shown that the detector can be expressed as an anchored signal in the signal subspace and the coefficients can be estimated by the Kalman filter using only the signature waveform and the timing of the desired user.
标签： multiuser detection adaptive subspace
上传时间： 2015-09-07
上传用户：xieguodong1234
