360compkill5.0

viterbi译码算法的matlab源代码(viterbi decoding algorithm matlab source code)

采用直接序列扩频技术的BPSK接收机matlAB仿真，内含说明。(This is a code for simulation of BPSK receiver using Direct Sequence Spread Spectrum. The performnace is evaluated in presence of AWGN and Rayleigh fading.Jakes Model has been used to obtained coefficients for rayleigh fading.)

可以实现快速傅里叶的计算，适用于matlab环境(Calculation can achieve fast Fourier for matlab environment)

Matlab SpectrogramMatlab SpectrogramMatlab SpectrogramMatlab SpectrogramMatlab SpectrogramMatlab Spectrogram

利用LPC算法实现对于语音信号的特征提取，将一帧的语音信号用简化模型的参数来表示(The use of the LPC algorithm to extract to achieve For the the characteristics of of the voice signal, will the the a of the voice to represent the by the signal with a simplified the the the parameters of of the model)

说明：  基于matlab简单图像处理系统中对图片的加噪功能(Based on a simple matlab image processing system for image plus noise functions)

KNN algorithm for matlab

梯度下降法是最早最简单，也是最为常用的最优化方法。梯度下降法实现简单，当目标函数是凸函数时，梯度下降法的解是全局解。一般情况下，其解不保证是全局最优解，梯度下降法的速度也未必是最快的。梯度下降法的优化思想是用当前位置负梯度方向作为搜索方向，因为该方向为当前位置的最快下降方向，所以也被称为是”最速下降法“。最速下降法越接近目标值，步长越小，前进越慢。(The gradient descent method is the earliest and most simple and most commonly used optimization method. The gradient descent method is simple to realize. When the objective function is a convex function, the solution of the gradient descent method is a global solution. In general, the solution is not guaranteed to be the global optimal solution, and the gradient descent method is not necessarily the fastest. The optimization idea of gradient descent method is to use the current position negative gradient direction as the search direction, because the direction is the fastest descending direction of the current position, so it is also called the steepest descent method. The faster the slowest descent approach is closer to the target, the smaller the step, the slower the progress.)

This paper examines the asymptotic (large sample) performance of a family of non-data aided feedforward (NDA FF) nonlinear least-squares (NLS) type carrier frequency estimators for burst-mode phase shift keying (PSK) modulations transmitted through AWGN and flat Ricean-fading channels. The asymptotic performance of these estimators is established in closed-form expression and compared with the modified Cram`er-Rao bound (MCRB). A best linear unbiased estimator (BLUE), which exhibits the lowest asymptotic variance within the family of NDA FF NLS-type estimators, is also proposed.

算法部分是网上下的，因为应用不同，有所改动，界面程序是我自己加的，很简陋，但是能用，有的地方原程序被注释掉了，是为了保持原有程序的语句，怕删掉以后回不去。运行时注意地址和函数调用格式 (poor)