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使用QPSK调制方式的简单的通信系统，包含载波同步位同步等模块(a simple communication system, using QPSK modulation, including bit synchronization and carrier synchronization)

本文分析了多级维纳滤波器的特性，在加性噪声和二维天线阵列如均匀圆阵、均匀面阵、十字阵等条件和背景下，对信源个数和信源参数估计问题进行了研究，提出了基于多级维纳滤波器前向分解特性的快速参数估计方法，同时提出了基于多级维纳滤波器的二维ESPRIT参数估计方法，该类方法无需协方差矩阵的估计运算及分解运算，计算复杂度较低。另外，还提出了对信源个数的估计算法。(This paper analyzes the characteristics of multistage Wiener filter, in the additive noise and the two-dimensional antenna array such as a uniform circular array, the uniform array, cross array conditions and background, the source number and source parameter estimation problem undertook study, put forward based on Multistage Wiener filter prior to the decomposition characteristics of fast parameter estimation method, at the same time based on Multistage Wiener filter 2D ESPRIT parameter estimation method, the method does not need to estimate of covariance matrix calculation and decomposition, relatively low computational complexity. In addition, also put forward for source number estimation algorithm.)

MODULATION DIGITAL AND ANALOG

ijetty服务器的启动关闭以及资源下载，基本框架，直接import进eclipse就可运行(ijetty server startup shutdown, and resources, the basic framework for direct import into eclipse can be run)

GSM网络的动态信道分配，对于初学这方面的同学有很大帮助(GSM network, dynamic channel allocation, for the beginner in this area of ​ ​ great help to students)

BPSK调制方式AWGN信道的理论误码率、仿真误码率以及瑞利信道下的理论值和仿真误码率(Theoretical BER of BPSK modulation AWGN channel BER simulation and theoretical value of the Rayleigh channel simulation error rate)

说明：  仿真多种调制信号,包括AM FM PSK QAM等(Simulate a variety of modulation signals, including AM FM PSK QAM, etc)

高速DDR存储器数据接口设计实例. 1. 将文件拷入硬盘 2. 产生DQS模块 3. 产生DQ模块 4. 产生PLL模块 5. 拷贝以上步骤生成的文件到子目录【Project】中 6. 打开子目录【Project】中的DataPath.qpf工程，设计顶层模块 7. 编译并查看编译结果 (High-speed DDR memory interface design data. 1. Copyed into the document hard disk 2. DQS generated module 3. Have a DQ module 4. Have a PLL module 5. Copies of the above steps to generate a document to a subdirectory 【Project】 6. Open the subdirectory 【Project】 DataPath.qpf in engineering, design top-level module 7. compilers to compile the results and see)

极化码matlab仿真程序,包含各种译码方法（sc译码,scl译码，crc校验scl译码）(matlab simulation of polar codes)

雷达系统，基于matlab实现雷达信号的相参积累的简单代码(Radar system, based on MATLAB, is a simple code for coherent accumulation of radar signals.)