secant

Computes the circular convolution of two functions.

It compute the separation between two plasma bubbles in all sky images. i.e. distance between two horizontal pixels in km.

用于仿真舰载高频地波雷达，内含注释和部分参数(Simulation of Shipborne High Frequency Ground Wave Radar)

正交频分复用是一种多载波宽带数字调制技术。相比一般的数字通信系统， 它具有频带利用率高和抗多径干扰能力强等优点，因而适合于高速率的无线通信系统。( OFDM Simulator -------------------------------------------------------------------------------- MIMO OFDM Simulator: OFDM.m: OFDM Simulator (outer function) create_channel.m: Generates a Rayleigh fading frequency-selective channel, parametrized by the antenna configuration, the OFDM configuration, and the power-delay profile. svd_decompose_channel.m: Since full channel knowledge is assumed, transmission is across parallel singular value modes. This function decomposes the channel into these modes. BitLoad.m: Apply the bit-loading algorithm to achieve the desired bit and energy allocation for the current channel instance. ComputeSNR.m: Given the subcarrier gains, this simple function generates the SNR values of each channel (each singular value on each tone is a separate channel). chow_algo.m: Apply Chow s algorithm to generate a particular bit and energy allocation. EnergyTableInit.m: Given the SNR values, form a table of energy increments for )

实现基本MUSIC算法,加入高斯白噪声,完成信号来波方向的精确定位(achieve basic MUSIC, by adding Gaussian white noise, the complete signal wave direction to the precise location)

用matlab编写的码率自匹配的联合信源信道编解码仿真平台。使用码率与信噪比自匹配的信道传输一张jpeg2000图片，信道编码方式为turbo码。(Joint source channel codec bit rate using matlab since matching simulation platform. Channel transmission bit rate and SNR since matching a jpeg2000 pictures, channel coding, turbo codes.)

Add Gaussian white noise (mean=0 and variance=0.05 ) to the image using imnoise command. Now use fftshift command to put all zero frequencies in the middle. Low-pass filter this function by applying a mask saving only the central Fourier coefficients. Set the mask width to 255 and create the filtered image.

用matlab实现的3Dplot绘制例子程序。(draw 3Dplot using matlab)

fastICA,进行串行盲源分离的一种不错的方法(fastICA, serial blind source separation method for a good)

variable structure sliding mode controller