foe_demo

说明：  MIMO系统由于在空间中具有多个发送和接收天线，因此其信道模型也具有其特有的复杂性。尽管具有这种复杂性，对MIMO信道进行建模仍然十分必要。(Because MIMO system has multiple transmit and receive antennas in space, its channel model also has its own complexity. Despite this complexity, it is still necessary to model MIMO channels.)

uwb_ppm_bpsk的源码,可以由此学习UWB的调制解调方式,对研究UWB有很大帮助(uwb_ppm_bpsk source code, which can study the UWB modulation and demodulation, UWB research will be of great help)

说明：  1、基带码型仿真 （1）通过仿真观察占空比为50%、 75%以及100%的单、 双极性归零码波形以及其功率谱，分析不同占空比对 仿真结果的影响。 （2） 通过仿真产生一随机消息码序列，将其分别转换为 AMI码和HDB3码，观察它们的波形及其功率谱密度。 2、数字带通调制系统仿真 设计一个采用2ASK（ OOK） 调制的数字通信系统： 产生二进制随机数据，并仿真其对应的2ASK调制波形， 分析其频谱。所产生的调制波形加入不同信噪比的白噪声， 选取合适的接收方案，画出系统误码率曲线，并与理论误 码率进行对比。(1.Baseband pattern simulation 2. Simulation of digital band-pass modulation system)

说明：  主动光学三维传感技术中的相位展开算法——二维菱形算法(Active optical sensing technology in three-dimensional phase unwrapping algorithm- Algorithm for two-dimensional diamond)

说明：  LFM线性调频波的matlab实现方法，并附上几种常用算法。(The Matlab implementation method of LFM chirp is accompanied by several commonly used algorithms.)

自适应动态规划，利用BP神经网络，进行迭代更新，得到最优值(Adaptive dynamic programming using BP neural network)

螺旋型K空间MRI扫描的原始数据，适于做螺旋型扫描下的图形重建算法研究。(Spiral K space of the original MRI scan data, suitable for helical scan to do the next graphical reconstruction algorithm.)

瑞利衰落信道建模 误码率、传输速率 多径传输(Rayleigh fading channel modeling Bit error rate and transmission rate Multipath transmission)

黄河的GIS地图，shp格式，方便ARCview学习者使用(GIS map of the Yellow River, shp format, to facilitate the use of ARCview learners)

对当前通信信号中常用的数字调相信号BPSK、QPSK、1／4一QPSK、8PSK的调制识别问题，提出了一种基于信号差分高阶累积量的识剐算法。该算法分两个层次进行调制识别，首先利用信号的四阶累积量特征对BPSK、QPSK和{1／4一QPSK、8PSK}信号进行识别，然后再利用信号差分的四阶和八阶累积量特征对1/4-QPSK、8PSK信号进行识别。从理论上分析了的该算法的有效性，并通过计算机仿真验证了算法具有良好的性能。(A recognition algorithm based on differential high-order cumulant is proposed for the modulation recognition problems of BPSK, QPSK, 1/4-QPSK and 8PSK, which are commonly used in current communication signals. The algorithm is divided into two levels for modulation recognition. Firstly, BPSK, QPSK and {1/4-QPSK, 8PSK} signals are identified by using the fourth-order cumulant characteristics of signals, and then 1/4-QPSK and 8PSK signals are identified by using the fourth-order cumulant and eighth-order cumulant characteristics of signal difference. The validity of the algorithm is analyzed theoretically, and the good performance of the algorithm is verified by computer simulation.)