65520803trace

说明：  通过matlab实现车联网下的资源分配，包括用户、路边单元和基站，相关毕设可以使用(Matlab is used to realize the resource allocation under the vehicle network, including users, roadside units and base stations, which can be used in relevant settings.)

说明：  对舰载 HFSWR（高频地波雷达）的阵列误差进行数学建模，通过 MATLAB 仿真来分析阵列误差对两种阵列信号处理算法的影响，并在此基础上以幅相误差为例研究了误差校正算法。(Construct the mathematical modeling of array error, and to analyze the influence of array error on the array signal processing algorithm. Based on this, the error calibration algorithm is studied by taking the amplitude and phase error as an example)

考虑时变系统，采用遗忘因子递推最小二乘法进行参数识别(The time-varying system is considered, and the forgetting factor recursive least square method is used to identify the parameters)

关于移动通信的跳频，直接扩频和CDMA的matlab算法(Matlab algorithm for frequency hopping, direct spread spectrum and CDMA in mobile communication)

16QAM调制信号的GAD定时恢复，对定时恢复环路的验证和实现(Gardner Timing Recovery for 16QAM)

说明：  对原始信号进行EMD分解及包络解调，得出包络解调谱，分析出故障频率(The original signal is decomposed by EMD and demodulated by envelope. The spectrum of envelope demodulation is obtained and the fault frequency is analyzed.)

说明：  GPS 单系统单频伪距静态 单点定位 CEP95 2.9(Single point positioning)

pmsg model with workspace using

永磁同步电机直接转矩控制系统仿真模型，和大家交流学习(The permanent magnet synchronous motor direct torque control system simulation model, and we exchange learning )

Compared to the development of computers, or the Internet, or even cars, the evolution of aviation equipment appears to be very unhurried. Several factors contribute to this very gradual pace, but one of the most important is the extreme care with which any innovation affecting safety has to be examined, evaluated, analyzed, and tested. Satellite navigation equipment for aircraft is not an exception, so predicting its future for the next20 years is relatively easy compared to predictions for other fields. In this paper first of all we will describe briefly the challenges that satellite navigation must solve to be available solution for aviation. Then, we will describe the systems that have been developed to overcome these challenges and the performance they offer today, or will offer very soon. There is currently an explosion in satellite Navigation: before the end of this decade there will be over three times more satellites, offering civil signals in two distinct frequencies (as opposed to one today).