pufenxi_xiebo

信号估计 最大似然估计模块 克拉美罗界模块(Maximum likelihood estimation modules)

信息经格雷码映射，进行QPSK调制并通过AWGN信道发射，在接收端进行QPSK解调，并统计误符号率和误码率。(Information on the Gray code mapping, QPSK modulation and emission through the AWGN channel, QPSK demodulator at the receiving end, and the statistical symbol error rate and bit error rate.)

说明：  matlab实现的信道指标计算求误码率低的信道(Calculation of channel index realized by MATLAB to find the channel with low bit error rate)

说明：  有助于学习LS信道估计的编码,以及mmse和LMMSE(ls chanel MMSE CHANEL LMMSE CHANEL)

说明：  采用线性调整，对图像进行增强，主要是对比度拉伸，可以反映直方图(linear adjustments to enhance image, mainly tensile contrast, can reflect histogram)

说明：  采用差分阈值法对心电信号QRS波进行特征提取的matlab程序。,Differential threshold method QRS wave of ECG feature extraction of matlab program.(A matlab program for feature extraction of QRS wave of ECG signal by differential threshold method is presented.)

D2D通信分为集中式控制和分布式控制。集中式控制由基站控制D2D连接，基站通过终端上报的测量信息，获得所有链路信息，但该类型会增加信令负荷(D2D communication is divided into centralized control and distributed control. Centralized control is connected by the base station. The base station obtains all link information through the measurement information reported by the terminal)

强化学习解最优控制的matlab代码，可以运行(The matlab code of reinforcement learning solution optimal control, it can run)

说明：  雷达信号分选的经典matlab代码。包含PRI变换、CDIF、SDIF三种方式(radar signal sort include PRI CDIF SDIF)

QPSK的编译 设定噪声为高斯白噪声，对2ASK、2FSK、2PSK、2DPSK等各种调制方式及相应的主要解调方式下（分相干与非相干）的误码率进行统计，并与理论值进行比较，以图形方式表示误码率与信噪比间的关系。(QPSK compiled Set the noise is Gaussian white noise, right 2ASK, 2FSK, 2PSK, 2DPSK variety of modulation and demodulation mode corresponding to the main (sub-coherent and non-coherent) error rate statistics, and with the theoretical value comparison, a graphical representation of bit error rate and SNR relationships.)