psnr1

The Interleaved Frequency Division Multiple Ac- cess (IFDMA) scheme is based on compression, repetition and subsequent user dependent frequency shift of a modulated signal. Multiple access is enabled by the assignment of overlapping but mutually orthogonal subcarriers to each user. In this paper it is shown that IFDMA can be regarded as unitary precoded OFDMA with interleaved subcarriers. On the other hand, IFDMA is shown to be a CDMA variant with frequency domain orthogonal signature sequences and chip interleaving. Thus, it combines the advantages of single and multi carrier transmission such as low peak to average power ratio, orthogonality of the signals of different users even for transmission over a time dispersive channel and low complexity. Simulation results show the good performance of coded IFDMA transmission over a mobile radio channel for different data rates.

说明：  相信对初学者比较有用，欢迎大家下载并交流与指导。(Believe that the more useful for beginners, are welcome to download and exchange and guidance.)

这是用matlab编写的显示积分方法中心差分法的源程序，可用于求解微分方程描述的工程问题和相关仿真(This is prepared using matlab central difference integration method shows that the source method can be used to solve differential equations to describe the engineering problems and related simulation)

说明：  基于PCNN的图像灰度增强，我做毕业设计的时候的东西。(Grayscale image enhancement based on PCNN)

说明：  2fsk在matlab simmulink上面的仿真(2fsk above simulation in matlab simmulink)

通过一个强非线性模型比较ukf、ekf、pf、pfekf、pfukf等的性能。(By a strong non-linear model is ukf, ekf, pf, pfekf, pfukf such performance.)

Eye pattern MATLAB code

：针对TV模型修复算法只沿梯度垂直方向扩散，容易在平滑区域引入阶梯效应，迭代效率低，易产生假边缘的缺点，分析比较了TV图像修复模型的性能，提出了一种改进的图像修复算法。(Abstract：TV image inpainting only repairs algorithm along the vertical direction，making diffusion gradi— ent in smooth area into stair step effect，reducing iterative efficiency，producing false edge faults．We ana— lyse and compare the TV image restoration model and repair the performance of the model is put forward in this paper．Puts forward an improved image restoration algorithm)

This function approximates the long period the peak of the scattering curve on the frame range ‘start’ to ‘finish’. Note: not valid for noisy data.

802.11协议里面牵扯到的OFDM技术。(802.11 protocol which involves the OFDM technology.)