时频信号分析

TO PLOT THE RAYLEIGH DISTRIBUTION PLOT

仿真MIMO系统，采用STBC编码，发射天线数目为2，接收天线数目为2(The MIMO system is simulated with STBC coding, the number of transmit antennas is 2, and the number of receiving antennas is 2)

争对移动声源采用波束形成进行语音增强，提出一种约束子带波束形成算法。其波束形成器基于一个软约束，其目的是要使波束指向特定的区域即声源方向。而其核心在于首先要进行声源定位，获得尽量准确的方位信息，然后构造软约束条件，用于波束形成。且在此过程中不断跟踪声源的移动情况。在构造的约束条件中，需要知道声源的二维信息，即与麦克风阵列的距离和方向角，“软”体现在对距离和方向角的确定都是在一定范围内的，有待进一步更正。(Between the mobile sound source using beamforming for speech enhancement, a constrained subband beamforming algorithm. Its beamformer based on a soft constraints, the aim is to make the beam point to a specific region that is the direction of the sound source. And its core is the first to sound source location, access to location information as accurately as possible, and then construct the conditions of soft constraints for beamforming. And in the process continuously tracking the movement of a sound source. Structure at the binding conditions, need to know the two-dimensional sound source information, that is, with the microphone array the distance and direction angle, the " soft" embodied in the distance and direction angle of the determination are within the scope must be further corrected .)

matlab写的ldpc编译码仿真，自己可以该参数看误码率，(matlab ldpc encode decode)

ofdm+mimo+rayleigh仿真M文件，需要研习的请下载。(ofdm+mimo+rayleigh整个通信模型仿真，包含预编码，SVD（奇异值分解），SER计算，自适应（SISO的），OFDM调制解调)

这个例子显示了如何使用的Windows RegisterDeviceNotification功能，收到WM_DEVICECHANGE消息(This example shows how to use the Windows RegisterDeviceNotification function to receive WM_DEVICECHANGE messages)

2x2，4x4MIMO的误码率性能仿真，比较了ML,ZF,MMSE,ZF-SIC,MMSE-SIC在4QAM和16QAM下的性能曲线(The BER performance of 2x2 and 4x4MIMO is simulated, and the performance curves of ML, ZF, MMSE, ZF-SIC, and MMSE-SIC under 4QAM and 16QAM are compared)

无线通信中继协作功率控制相关代码Wireless communication relay cooperative power control related code(Wireless communication relay cooperative power control related code)

说明：  单频、宽带信号的线阵、面阵波束形成，用的是fft能量或者幅度求和的做法(Beamforming of linear array and area array for single frequency and broadband signals)

估计接收到的直扩信号的载频，码速率，以及扩频增益(Estimate the carrier frequency, code rate, and spread spectrum gain of the received DSS signals)