BitAllocation_opticalCom

这是一份有关matlab中文教材程序代码，希望通过此文件可以使大家更好的学习matlab。(This is a Chinese teaching materials about matlab code, hope that through this file can make everyone better learning matlab)

a simple way to detect and analyse Abnormal crowd

Bit Error Rate for QPSK Modulation with Rayleigh Channel

说明：  基于地统计半变异函数的单Y拓阶程序,由MATLAB编写,调用定阶来确定拓阶数,调用拓阶来完成Y的拓阶,输出为M*N矩阵(Single Y statistical semi variation function extension order based procedures, prepared by MATLAB, call order to determine the extension order number, call the extension order to complete the Y extension of the order, the output for the M*N matrix)

Application of spread spectrum for satellite land mobile systems is difficult in satellite link because of synchronization and providing code or considerable Doppler shift. This is particularly high for LEO satellites. So that, a Doppler shift carrying a frequency in band S can reach to several tens of kHz. To estimate and compensate Doppler, a CW pilot carrier is used. The aim of this study is simulate Doppler frequency estimation using MIMO-OFDM technique. Finally, the proposed algorithm is compared to MMSE algorithm in order to insure its performance.

in this theeses work we analysze the papr for better power performance in ofdm system ...............................with comparison to paper

this is a code for wavelet decomposition

DIT FFT of sequence and comparison with fft function

In signal processing, a window function (also known as an apodization function or tapering function[1]) is a mathematical function that is zero-valued outside of some chosen interval. For instance, a function that is constant inside the interval and zero elsewhere is called a rectangular window, which describes the shape of its graphical representation. When another function or waveform/data-sequence is multiplied by a window function, the product is also zero-valued outside the interval: all that is left is the part where they overlap, the view through the window .

应用matlab语言编写，可用于一维信号去噪，去噪效果较好。(Application matlab language, can be used for one-dimensional signal de-noising, de-noising better.)