Critical-spindle-speed

QAM_Eb_No-SER. This Code describer a modulation program

使用viterbi方法译码的源代码，可以绘制最佳路径选择过程的仿真图(Viterbi decoding method using the source code, you can draw the best path selection process simulation diagram)

A major challenge to MIMO-OFDM systems is how to obtain the channel state in- formation accurately and promptly for coherent detection of information symbols and channel synchronization.

Gauss Seidel 解数学矩阵方程 Bisection 解1元高次方程 Newton Method 解高次方程 Taylor series 泰勒公式求方程近似解(In numerical linear algebra, the Gauss–Seidel method, also known as the Liebmann method or the method of successive displacement, is an iterative method used to solve a linear system of equations.)

DISP Display array.

预编码主函数。在通信系统中知道CSI情况下，预编码。(English Description)

this .m file describes how to apply filters on Images ( sobel , Robert ... etc )..

自己写的一个锁相环程序，希望对大家有所帮助(A phase-locked loop to write their own procedures, we hope to be helpful)

In this paper, we investigate the timing and carrier frequency offset (CFO) synchronization problem in decode and forward cooperative systems operating over frequency selective channels. A training sequence which consists of one orthogonal frequency-division multiplexing (OFDM) block having a tile structure in the frequency domain is proposed to perform synchronization. Timing offsets are estimated using correlation-type algorithms. By inserting some null subcarriers in the proposed tile structure, we propose a computationally efficient subspace decomposition- based algorithm for CFO estimation. The issue of optimal tile length is studied both theoretically and through simulations. By judiciously designing the tile size of the pilot, the proposed algorithms are shown to have better performance, in terms of synchronization errors and bit error rate, than the time-division multiplexing-based training method and the computationally demanding space-alternating generalized expectation-maximization

运行文件后任意输入字母，可以统计大小写字母的个数(After the input file to run arbitrary letters, upper and lower case letters can be the number of statistics)