halfband_simulink_2014

turbo码的编解码程序，采用max-log-map算法，简单易用。程序采用QPSK调制，信道为AWGN(turbo code decoding process, using max-log-map algorithm, easy to use. Program uses QPSK modulation, AWGN channel is)

A speech signal filterbank, using melscale frequency and framebanking.( 1. For speech signal can be represented as a discrete sequence of frames (or feature vectors) that can be used as the input to a speech recogniser. Important ideas and techniques that are used in the assignment are the design of a (Mel frequency scale) audio filterbank, , windowing of a continuous audio signal, spectrum analysis of the signal, filtering as multiplication in the frequency domain, the visual representation of a speech signal as a spectrogram, appreciation of the acoustic variability in real speech utterances. 2. To gain a deeper knowledge of the application of MATLAB programming to audio signal processing. 3. To gain practice in the art of writing a formal report: structure, content, style, use of diagrams, presentation etc. etc. )

说明：  关于LDPC编码的MATLAB实现仿镇,求关于LDPC码的FPGA实现(LDPC coding on the fake MATLAB town, seeking LDPC on the FPGA)

通过总结几种潮流计算的方法，并通过MATLAB进行编程(Summary of several flow calculation method, and through MATLAB programming )

产生L=31的gold序列，又两个移位寄存器输出的模2相加产生。(L = 31 generated sequences of gold, but also two shift registers generate the sum of the output mode 2.)

对二维图像进行hough变换，并显示hough变换的结果(pair of two-dimensional images hough transform, and display the results hough transform)

Greedy sanke algorithm implements(贪婪蛇算法的实现，该算法是对原Donna J. Williams 《A fast algorithm for active contours》 （1990） 论文的简化实现。对算法研究很有帮助。参数很多，需要调节才能获得良好的效果。)

fcm的过程，有图像界面不知道咋传，可以根据代码自己加按钮(fcm the process, there do not know ye pass graphical interface, you can add the button under the code itself)

A code to solve a 2-D truss structure using FEM theorem (direct method). Each branch of the truss is considered as a 2-force member and the coordinates of the nodes in Cartesian system is needed. This code contains 3 functions: Truss_f, which is the main function to calculate stress, strain and force.M_properties22, which contains the mechanical properties of whole truss in a matrix P_condition22, which contains boundary condition and external forces in a matrix

正弦周期信号的随机共振，不同于以往微弱信号检测中的抑制噪声，随机共振能通过噪声加强信号传输能力( We present the numerical method to solve the bistable SR model based on Runge-Kutta algorithm, and propose a new kind of approach for detecting weak signal, which can effectively detect both period and aperiodic weak signals corrupted by the strong noise background. )