mimo-ofdm

2009年9月份研究生数学建模的程序代码和图表，题目：关于城镇就业人数的数学模型，获得二等奖。(September 2009 Graduate mathematical modeling of program code and charts, the title: on the mathematical model of urban employment, won second prize.)

Matlab程序，GUI窗口 用FFT程序计算有限长度正弦信号y=sin(2*pi*f*t) ,0<=t<=N*T(FFT program calculate the finite length of the sinusoidal signal y = sin (2* pi* f* t), 0 < = t < = N* T respectively the DFT results obtained and analyzed and discussed in the following cases: a) the signal frequency f = 50Hz, the sampling the credited with N = 32, the sampling interval T = 0.000625sb) signal frequency f = 50Hz, the sampling points of N = 32, the sampling interval T = 0.005sc), the signal frequency f = 50 Hz, the sampling points N = 32, the sampling interval T = 0.0046875sd) signal frequency f = 50Hz, the sampling points of N = 32, the sampled interval T = 0.004se) signal frequency f = 50Hz, the sampling points of N = 64, the sampling interval the T = 0.000625sf) signal frequency f = 250Hz, the sampling points N = 32, the sampling interval T = 0.005sg) c) a signal-post 32, to do a 64-point FFT)

对双极性随机序列二进制数字基带信号，采用开方升余弦滚降波形、矩形脉冲、半波正弦在白噪声条件下的最优（匹配滤波器）接收程序。考察码间串扰和白噪声共同作用引发的误码，画出误码率曲线；设计均衡器画出误码率曲线。(Bipolar random sequence of binary digital baseband signal, using the square root raised cosine wave, rectangular pulse, half sine wave white noise under optimal conditions (matched filter) receiver. Crosstalk and white noise error caused by interaction between the inspection code, drawn BER curves design equalizer to draw BER curves.)

DCT and Image Compression In the JPEG image compression algorithm, the input image is divided into 8-by-8 or 16-by-16 blocks, and the two-dimensional DCT is computed for each block. The DCT coefficients are then quantized, coded, and transmitted. The JPEG receiver (or JPEG file reader) decodes the quantized DCT coefficients, computes the inverse two-dimensional DCT of each block, and then puts the blocks back together into a single image. For typical images, many of the DCT coefficients have values close to zero these coefficients can be discarded without seriously affecting the quality of the reconstructed image. The example code below computes the two-dimensional DCT of 8-by-8 blocks in the input image, discards (sets to zero) all but 10 of the 64 DCT coefficients in each block, and then reconstructs the image using the two-dimensional inverse DCT of each block. The transform matrix computation method is used.

i think i t a usedfu lomosuoou oform yi moe (fdeoey ou iyou migouo oe youmieyo)

说明：  在计算机上实现直流电动机的脉宽调速、双闭环晶闸管调速的Simulink仿真，可以较为形象的观察电动机的调速全过程，同时可以改变相关参数来实现不同情况下的调速过程。(The computer realization of the PWM DC Motor Speed Control, dual-closed-loop speed control thyristor Simulink simulation, the image can be observed the whole process of motor speed, while the relevant parameters can change under different circumstances to achieve the speed control process.)

C++实现数字信号处理中的DFT算法，不是快速算法，是基础DFT算法(C++ implementation of digital signal processing DFT algorithm, not a fast algorithm is the basis of DFT algorithm)

1．通过实验加深对快速傅立叶变换（FFT）基本原理的理解。 2．了解FFT点数与频谱分辨率的关系，以及两种加长序列FFT与原序列FFT的关系。 离散傅里叶变换（DFT）和卷积是信号处理中两个最基本也是最常用的运算，它们涉及到信号与系统的分析与综合这一广泛的信号处理领域。实际上卷积与DFT之间有着互通的联系：卷积可化为DFT来实现，其它的许多算法，如相关、滤波和谱估计等都可化为DFT来实现，DFT也可化为卷积来实现。(1. Deepen the experimental fast Fourier transform (FFT) the basic tenets of understanding. 2. Understand the FFT spectrum and points of the resolution, and two extended sequence with the original FFT FFT relations. Discrete Fourier Transform (DFT) and the convolution of two signal processing is the most commonly used basic arithmetic, they relate to the signal and system analysis and synthesis of the wide range of signal processing field. DFT actually convolution and interoperability between contact : DFT into convolution can be achieved in many other algorithms, If relevant, filtering and spectral estimation could be achieved as DFT, DFT into convolution can be achieved.)

小波去噪的matlab程序。有三种阈值选择方法：标准的，强制的，自己设置的。(Wavelet denoising matlab program. There are three kinds of threshold selection method: standard, mandatory, set up their own.)

源于谱分析的交通流预测，预测效果相当不错(From spectral analysis of traffic flow forecasting, prediction is quite good)