gray-system

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：  关联规则挖掘和数据分析matlab工具箱（armda），适合从交易数据中挖掘关联规则(Association rule mining and data analysis matlab Toolbox (armda), for transaction data from the mining association rules)

It is a files related to basic programes of MATLAB

设计一个2阶加权自适应噪声对消器，对经加性白高斯噪声信道干扰的正弦信号进行滤波。(Design a two-order-weighted adaptive noise canceller, right through the additive white Gaussian noise channel interference sinusoidal signal filtering.)

Matlab simulation for Rayleigh fading channel.(with Golay encoding and decoding). Modulation method is BPSK. Provide BER curve.

Low density lattice decoder via non-parametric belief propagation

matlab小波工具箱,详细介绍了各种函数的使用方法(matlab wavelet tool kit.detail description of the wavelet using method.)

Newton-Thiele 二元有理向量插值，向量为二元(Newton-Thiele bivariate rational interpolation vector, vector for the binary)

利用matlab制作的小型单功能计算器，测试回调函数。(Small single-function calculator using matlab production test callback function.)

Power system load flow analysis using NR Power Flow method