IEEE802.15.4achannelmodel

采用多种方式的调制技术，在通信中具备抗干扰，抗多径等各种功能。(Modulation technique using a variety of ways, in communication with jamming, anti-multipath and other functions.)

The overall objective for LTE is to provide an extremely high performance radio-access technology that offers full vehicular speed mobility and that can readily coexist with HSPA and earlier networks. OFDM/OFDMA technology is introduced for the LTE downlink, supporting very high data rates of up to 300Mbps while Single-Carrier FDMA (SC-FDMA) is used in the uplink with data rates of 80Mbps possible. Additionally, LTE supports operation both in paired and unpaired spectrum (FDD and TDD) using channel bandwidths of approximately 1.4MHz up to 20MHz. The frequency domain scheduling can be done in OFDMA. One of the main challenges in OFDMA is the high peak-to-average radio of the transmitted signal, which requires linearity in the transmitter. The linear amplifiers have low efficiency therefore, OFDMA is not an optimized solution for a mobile uplink where the

用MATLAB/SImulink 搭建的单相光伏并网逆变器仿真，用PR电压环控制器进行控制(Single-phase photovoltaic grid-connected inverter simulation with MATLAB/SImulink, control with PR voltage ring controller)

全极化合成孔径雷达图像去取向程序，用于去除采集数据中的定向角对后期处理的影响(polSAR image deorientation)

Please always check http://research.baycrest.org/~jimmy/NIfTI for detail descriptions and latest updates. If you are confused by the Left / Right of an ANALYZE image, you can consult http://research.baycrest.org/~jimmy/UseANALYZE.htm You may also want to read http://research.baycrest.org/~jimmy/NIfTI/FAQ.htm

image polar to convert an image from Matrice to polar conrdinate, its about 5 functions that works toguether

说明：   小波神经网络MATLAB程序(Wavelet Neural Network MATLAB program)

8进制相位调制数字基带传输的simulink模型 过高斯信道 有星座图(8PSK digital baseband transmission via Gauss channel with simulink)

A major issue in computer network is to prevent important information being disclosed to illegal user.

Jacobi迭代法和Gauss-Seidel迭代法求解线性方程组，matlab语言编程。(Jacobi iteration method and Gauss-Seidel iteration method for solving linear equations, using the Matlab programming language.)