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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.

MATLAB Recipes for Earth Sciences

主要解决用MATLAB求解偏微分的问题，着重介绍PDE工具箱，十分适合初学者(Mainly to solve the partial differential use MATLAB to solve problems, focused on PDE Toolbox, is very suitable for beginners)

控制仿真很好的资料，包括滑膜变结构控制，希望对大家有用！(Control simulation of very good information, including the the synovial variable structure control, the hope that useful!)

欧拉角转换为四元数的MATLAB程序，顺序为312(Euler angles into a quaternion of the MATLAB program, the order of 312)

说明：  Enhanced Rotating Machine Fault Diagnosis Based on Time-Delayed Feedback Stochastic Resonance 论文的matlab代码，随机共振(Enhanced Rotating Machine Fault Diagnosis Based on Time-Delayed Feedback Stochastic Resonance)

matlab下使用帧差法实现视频跟踪，提供了一个测试视频和完整的说明文档。下载后可以直接在matlab环境下运行。(matlab using frame difference for video tracking, provides a test video and complete documentation. Download matlab environment can be run directly.)

matlab skin detection

16QAM 调制解调的matlab仿真及误码率的计算。(16QAM modulation and demodulation)

模式分类（中文版），课后题，164页第2题，MATLAB源程序(Pattern Classification (Chinese version), after-school question, 164 2 title, MATLAB source code)