xiangguan

QPSk误码性能的仿真程序，包括AWGN信道和瑞利信道性能曲线(QPSk BER performance simulation procedures, including the AWGN channel and Rayleigh channel performance curve)

這是一個利用butter filter 的bandstop 來濾除原始訊號中有雜訊的方法，先轉為spectrogram觀察雜訊所分步頻帶與能量，再依照要濾除的部分作bandstopa(This is a use of bandstop butter filter to filter out the noise of the original signal has a method, the first step into a spectrogram observation noise and energy of the band, then follow to filter out parts for bandstopa)

此函数用于IS-95前向链路系统的仿真，包括扩频调制，匹配滤波，RAKE接收等相关通信模块。仿真环境: 加性高斯白噪声信道. 数据速率 = 9600 KBps (This function is used for IS-95 forward link system simulation, including the spread spectrum modulation, matched filter, RAKE receiver and other related communication module. Simulation environment: additive white Gaussian noise channel. Data rate = 9600 KBps)

说明：  MATLAB是一个非常好的用于测量，分析和可视化的数据，控制仪器，并建立测试系统。安捷伦信号和频谱分析仪可让您分析失真，虚假的，相位噪声，用于2G到4G无线通信测量。这种Matlab下开发的高级数据可视化（ADV）的应用软件，扩展了安捷伦信号和频谱分析仪的可视化功能，提供了四个不同的显示格式：Analog Advanced, Analog Plus, Waterfall,和Spectrogram。这些显示使得更加容易捕获间歇性信号。(MATLAB is a very good for the measurement, analysis and visualization of data, control apparatus, and to establish test systems. Agilent signal and spectrum analyzers lets you analyze distortion, false, phase noise, for 2G to 4G wireless communication measurements. This developed under Matlab Advanced Data Visualization (ADV) of the application software, the expansion of the Agilent signal and spectrum analyzer visualization capabilities, providing four different display formats: Analog Advanced, Analog Plus, Waterfall, and Spectrogram. These shows make it easier to capture intermittent signals.)

generation of envelopedetnahla signal,,simulink

对获得的声音进行处理。得到相关参数的同时进行滤波。以达到降噪的目的。(To deal with and filter a kind of input sound modify the parameters of this voice.)

信号用m序列进行扩频，成型滤波和BPSK调制后经过信道发送到接收端，接收端进行解扩解调(Using m sequence spread spectrum signal, after forming filter and BPSK modulation channel is sent to the receiver, the receiver to enlarge demodulation )

1.灰色预测领域的权威书籍，详细介绍灰色预测模型。 2.经典灰色预测案例，并附有matlab操作程序，简单明了。(1., gray prediction authority books, detailed description of the gray forecasting model. 2. classic gray forecasting case, and accompanied by MATLAB operating procedures, simple and clear.)

该程序通过振型叠加法，用于计算多自由度结构动力响应(The program is used to calculate the dynamic response of multi degree of freedom structures by mode superposition method)

基于matlab的峰值检测算法,具有较为直观地意义，系数可以根据实际需要进行调节(Matlab-based peak detection algorithm, with a more intuitive sense, the coefficients can be adjusted according to actual needs)