QC-LDPC码字构造方法

仿真通信系统中QPSK的码头代码，大家可以作为参考(Simulation of Communication Systems pier QPSK code, we can serve as a reference)

一个二维的FDTD程序 本程序实现2维TM波FDTD仿真 此程序用PML设置吸收边界条件 FDTD_2D_kongqi_PML 仅含有Ez,Hx,Hy分量 (A two-dimensional FDTD program program realization of the wave 2-D TM FDTD simulation this program set with the PML absorbing boundary condition FDTD_2D_kongqi_PML contain only Ez, Hx, Hy component)

contour program for get a contour

该代码展示了如何通过数值方法估计某个量值的思路，方法具有新颖之处。。。望采纳(QUADGUI Demonstrate numerical evaluation of a definite integral. Q = QUADGUI(F,A,B) shows the steps in approximating the integral of F(x) from A to B by adaptive extrapolated Simpson s quadrature. The shaded area shows the integral over the current subinterval. The color switches to green when the desired accuracy is obtained.)

a new circuit topology of a phase-locked loop that can be used for synchronising a singlephase wind turbine generator (WTG) with the low voltage utility grid. The circuit is based on the time-delay digital tanlock loop (TDTL) architecture and was modelled and simulated using Simulink/MATLAB. The results presented demonstrate the ability of the circuit not only to synchronise a WTG with the grid, but also to re-gain synchronization following a sudden disturbance in the grid voltage. The simulated disturbances included a ramp and a multi-step change in the phase of the grid voltage waveform.

对数极坐标变换MATLAB程序,可以用于对图像做对数极坐标变换，常用于模式识别领域，用于识别旋转的图像(This program can be used to lo-poloar transform the image)

说明：  就是用来检测数据是否是异常数据的，是异常数据的话就标出来(It is used to detect whether the data is abnormal data. If it is abnormal data, it will be marked)

FIR 底通和带通滤波器和IIR 底通和带通滤波器，BP神经网络用于函数拟合与模式识别，线性调频脉冲压缩的Matlab程序,包含位置式PID算法、积分分离式PID，有均匀线阵的CRB曲线，各种kalman滤波器的设计。

The code summerize how to calculate the jitter (RMS) with the incoming signals, such as optical communications and clock and date recovery circuit

BER for BPSK in AWGN with receive diversity