2059328H_3

In a multiple transmit antenna, single antenna per receiver downlink channel with limited channel state feedback, we consider the following question: given a constraint on the total system-wide feedback load, is it referable to get low-rate/coarse channel feedback from a large number of receivers or high-rate/high-quality feedback from a smaller number of receivers? Acquiring feedback from many receivers allows multi-user diversity to be exploited, while high-rate feedback allows for very precise selection of beamforming directions. We show that there is a strong preference for obtaining high-quality feedback, and that obtaining near-perfect channel information from as many receivers as possible provides a significantly larger sum rate than collecting a few feedback bits from a large number of users.

In this experiment our equation is f(x0)=x^3-3x-1.We have to find the real root of this equation between 1 and 2.The programme has been shown in the"new_rap" We have done the comparison between the Newton Rapson method the false position method

EKF仿真，用于陀螺漂移误差仿真，较适合于初学者使用学习(EKF simulation for gyro drift error simulation, more suitable for beginners learning to use)

谱估计法分析随机信号，并对其进行傅里叶变换(Spectral analysis is a tool for signal analysis. Power spectrum estimation is based on limited data looking for signals, the frequency of random process or system components. It said random signal frequency-domain statistical characteristics, there is a clear physical meaning, is an important signal processing research content. Of random signals in the frequency domain, power distribution, that is the power spectral density or power spectrum. Power spectrum estimation has been widely used.)

极坐标下的分贝画图。matlab中极坐标画图函数为polar，但是无法画出转化为dB的图形，此函数为画db为单位数据的极坐标图形。(Db drawing in polar coordinates . matlab polar coordinate drawing functions for the polar , but can not draw dB graphics , this function graphics for painting db data in polar coordinates .)

一个50行的简短Matlab有限元程序，求解三维线弹性问题。执行fem3d.m即可。(A brief 50-line Matlab finite element program for solving three-dimensional linear elastic problem. Executive fem3d.m .)

说明：  一段matlab下的偏最小二乘回归代码,希望对大家有用.(Under a partial least-squares regression matlab code, and want to be useful to everyone.)

数字信号系统中的简单函数的离散傅里叶变换。(DFT of a simple function in DSP.)

matlab codes to generate 3D hip phantom

基于 的窗函数的各种窗函数的设计以及各个函数的性能参数分析以及仿真波形(Window function based on a variety of window function design and performance parameters of each function and the simulation waveform)