QPSK_OFDM_simulink

说明：  适应多个模式的rs编码，Verilog，选择对应的多项式(RS coding adapted to multiple modes.)

变步长的LMS滤波器设计，一种新的变步长LMS自适应滤波算法(Design of variable step size LMS filter, a new variable step size LMS adaptive filtering algorithm )

主要介绍ofdm中各种信道估计方法，包含一维和二维信道估计方法(Introduces the OFDM channel estimation in a variety of methods, including the one-dimensional and two-dimensional channel estimation methods)

OFDM系统中，部分传输序列PTS的算法源码((Orthogonal Frequency Division Multiplexing PTS)

为了对空间辐射源进行精确定位" 建立了基于任意阵列对多目标源进行二维DOA估计的数学模型。将 MUSIC算法推广到三维空间阵列可以对辐射源进行二维高精度测向,但由于其需要估计接收数据的协方差矩阵和进行特征分解, 因而其计算量较大。利用多级维纳滤波器的前向递推获得信号子空间和噪声子空间，不需要估计协方差矩阵和对其进行特征分解，从而降低了MUSIC算法的计算量。将文中的方法应用于任意阵列的二维DOA估计中进行计算机仿真和实际侧向系统性能验证,实验结果均表明该方法达到了MUSIC算法的性能,但与常规MUSIC算法相比降低了计算量.( In order to space radiation source for precise positioning" based on arbitrary array to multiple target source 2D DOA estimation model. The MUSIC algorithm is extended to three-dimensional space to two-dimensional array of radiation source for high precision direction finding, but due to the need to estimate the covariance matrix and eigenvalue decomposition, and the large amount of calculation. Use of multistage Wiener filter forward recursion received signal and noise subspace, does not need to estimate the covariance matrix and the eigenvalue decomposition, which reduces the computation of MUSIC algorithm. This method is applied to an arbitrary array DOA estimation for computer simulation and actual lateral system performance verification, the experimental results show that this method achieves the performance of MUSIC algorithm, but with the conventional MUSIC algorithm reduces the calculation amount.)

DSDV协议在ns2中的实现，可以直接使用，无需调试(DSDV protocol implementation in ns2, can be used directly, without debugging)

Multi-Carrier Cooperative Wireless Communication

用simulink中s函数实现两路切换开关(S function with simulink realization of two-way switch)

基于模拟退火算法的光学模式转换，为模分复用一种高效转换算法。(Based on the optical mode conversion of simulated annealing algorithm, a high efficiency conversion algorithm is used for modular division multiplexing.)

说明：  包含有数字通信课程实验大作业报告与代码。完成的OFDM的收发包含：1.卷积编码、2.自动增益控制、3.极大似然判决、4.QPSK收发、5.帧检测等，代码在MATLAB2016b环境下编译通过(It contains the report and code of the experiment assignment for the course of digital communication. The completed OFDM transceiver includes: 1. convolutional coding, 2. automatic gain control, 3. maximum likelihood decision, 4. QPSK transceiver, 5. frame detection, etc. The code is compiled and passed in MATLAB2016b environment.)