QPSK-SimulationGray-CodingRayleigh-Fading

matlab中使用FFT算法求两个信号的时频二维（互模糊）函数，可以实现信号的时延、多普勒频移联合估计（需要根据实际场景适当修改参数）(oint estimation matlab frequency two-dimensional FFT algorithm seeking the two signals (cross ambiguity) function, signal delay, Doppler shift)

为评估TD_SCDMA下行链路联合检测接收机的性能，使用MATLAB软件进行链路仿真，本程序主要是实现用户QPSK基带调制、扩频、加扰、形成时隙、形成子帧、以及进行脉冲形成滤波，通过加性高斯白噪声信道和瑞利衰落多径信道，信道估计、联合检测等几个主要过程，整个仿真都是在基带进行的。(Link simulation to assess the performance of the TD_SCDMA Downlink joint detection receiver using MATLAB software, this program is the main user QPSK baseband modulation, spreading, scrambling to form a slot to form a sub-frame, as well as for pulse formation filter, through an additive white Gaussian noise channels and Rayleigh fading multipath channel, channel estimation, the joint detection of several major process, the entire simulation in the baseband)

说明：  Performance Evaluation of DWT

nRF905无线收发模块收发信号程序(The program of the nRF905 wireless transceiver module )

水声声线仿真，基于射线模型。文章包含仿真条件和说明。文章附件为程序。(Underwater acoustic line simulation, based on the ray model. The article contains simulation conditions and instructions. The article appendix is the procedure.)

提供基本的基于能量检测的频谱感知功能，需要结合软件无线电外设USRP使用(Providing basic spectrum sensing capabilities based on energy detection requires the use of software radio peripheral USRP)

python 卡曼滤波的python代码和说明文档，程序都在文档里(python kalmanfilter)

支持IEC60870-5-104: 2000 IEC104规约软件包 实现104规约主站侧链路层的功能(IEC_Master_104.lib: void Init_SockServerport(WORD port=2404) void Init_Linkpara(int t0=30,int t1=15,int t2=10,int t3=20,int k=12,int w=8) virtual void On_init_Link_process() virtual void On_init_Sock_process() virtual void On_ErrorMsg(char*msgbuf) void slave_start() void slave_close() )

Z域表示的数字滤波器的响应举例,利用给出的Z域的传递函数，求在给定初始状态和输入信号的情况下的系统的零输入响应，零状态响应，完全响应等。(Z-domain representation of the response of the digital filter for example, using the given Z-domain transfer function, to seek zero input response of the system in the case given the initial state and the input signal, the zero state response, complete response.)

QAM调制的误码率仿真代码，通俗易懂，简单实用。(The error rate simulation code of QAM modulation is easy to understand, simple and practical.)