OFDM_Channel-estimation

说明：  5. 在三条径的瑞利信道中，对于直接序列扩频： (1) 请设计DS-CDMA一种具体的码分导引辅助的信道估计方法，接收机分别采用等均益合并、最大比合并。用Simulink进行仿真，画出比特信噪比与信道估计均方误差的关系曲线和比特信噪比与误码率的关系曲线。 (2) 设频率已经同步，请设计DS-CDMA一种具体的单停顿滑动相关时间同步方法，用Simulink进行仿真，画出比特信噪比与捕获概率的关系曲线。 (3) 设时间已经同步，请设计DS-CDMA一种具体的频率同步方法，用Simulink进行仿真，画出比特信噪比与频率同步误差的关系曲线。(5. In three-path Rayleigh channel, for direct sequence spread spectrum: (1) please design a specific code division navigation aided channel estimation method for ds-cdma, and adopt equal-beneficial combination and maximum ratio combination for receivers respectively.Simulink is used to simulate and draw the relationship curve between bit SNR and channel estimation mean square error and the relationship curve between bit SNR and bit error rate. (2) assuming that the frequency has been synchronized, please design a specific single-stop sliding correlation time synchronization method ds-cdma, Simulink simulation, draw the relationship between the bit SNR and the acquisition probability curve. (3) if the time has been synchronized, please design a specific frequency synchronization method ds-cdma, Simulink simulation, draw the relationship between the bit SNR and frequency synchronization error curve.)

基于Matlab的压缩感知信道估计算法 基于导频的信道估计 MMSE算法(Compressed Sensing Channel Estimation Based on MATLAB)

对跳频信号在干扰情况下的误码率进行防真，并以对数表示，一定要下(Interference of frequency hopping signals in case of error rate for anti-truth, and to the number that must be under)

这是在uwb系统中，用TOA定位法的的整个系统的仿真程序源码 (This is a simulation program source code for the entire system in uwb systems, TOA positioning method)

HART Communication Foundation - Block Data Transfer Specification

说明：  两个matlab的GUI实现UDP通讯，建议在两台电脑上测试。(The two matlab GUIs implement UDP communication. It is recommended to test on two computers.)

IEC61850中文版全套资料（14个文件）及学习心得。(Full set of data in Chinese version of IEC61850.)

分别上传了多天线系统中的SISO，SIMO，MISO以及MIMO模型仿真程序，对比了不同模型的容量。还有最优算法与最大范数算法的误码率比较程序。很实用！(Upload four system model,SISO SIMO MISO and MIMO,respectively.And compare their capacity.In addition,a BER program is also uploaded based on optimal algorithm and maximum norms)

基带脉冲成形数字滤波器的MATLAB设计与DSP上的实现(shaping filter and dsp realize theory )

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.)