移动通信系统及大规模MIMO技术

LDPC码的matlab仿真程序，希望对大家有用，不客气，(LDPC codes matlab simulation program, in the hope that useful, at worst,)

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关于微弱信号跟踪的一篇相当好的论文，基于BACIX接收机的(A paper about tracking of weak GPS signal， based on BACIX receiver.)

重型汽车车内声压级预测与主要噪声源分析 中国重型汽车正成为中国汽车产业在国际市场上最具竞争力的强势产业，但 目前国产重型汽车的 NVH（Noise,Vibration and Harshness）性能和国际先进水平 之间仍存在一定的差距。 (Heavy automotive interior SPL prediction and analysis of the major sources of noise China National Heavy Duty Truck is becoming China s auto industry the most competitive in the international market a strong industry, but At present, the domestic heavy-duty vehicles of NVH (Noise, Vibration and Harshness) performance and the international advanced level There is still a gap between.)

基于matlab的坐标变换程序，通过坐标的平移和旋转，实现坐标系中不同位置处物体三维坐标匹配。(Matlab-based coordinate transformation program, through coordinate translation and rotation, to achieve three-dimensional coordinates of the object at different positions to match the coordinate system.)

The first scheme is based on the spatial locality of feature vectors corresponding to similar images. Learning is effected by modifying the query vector to incorporate the positive examples. The second scheme is based on “distorting” our view of the feature space. An new similarity distance between an image and the query is learned from the relevance feedback.

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：在介绍过程监控主要内容及方法的基础上，归纳分析了统计过程监控的发展，详细阐述了传统 的PCA、PCR、PLS、FDA、HMM 和几种改进的PCA方法．指出，将人的经验和专家知识融人到PCA统计过程 监控，提高PCA的故障检测、隔离能力，完善故障诊断与评价能力，将是一个有价值的研究方向(: In the introduction the main content and methods of process monitoring based on the inductive analysis of the statistical process monitoring of development, elaborated on the traditional PCA, PCR, PLS, FDA, HMM, and several improved PCA method. Pointed out that the human experience and financial expertise to the PCA statistical process monitoring of people and improve the PCA fault detection, isolation, and improve fault diagnosis and evaluation capacity, will be a valuable research)

主要讲解了航空信道模型的仿真实现和参数选择，给出了各信道场景下的接收信号星座图以及概率密度曲线。(Mainly on the aviation simulation channel model implementation and parameter selection are given scenarios each channel received signal constellation and the probability density curve.)

说明：  结合matlab强大的数据处理能力和蒙特卡洛方法的强大随机模拟功能，编写了一个小算例(Combining the powerful data processing ability of MATLAB and the powerful random simulation function of Monte Carlo method, a small calculation example is compiled)