LMS

2. 设 是窄带信号，定义 是在 区间上均匀分布的随机相位。 是寬带信号，它是一个零均值、方差为1的白噪音信号e(n)激励一个线性滤波器而产生，其差分方程为 。 1） 计算 和 各自的自相关函数，并画出其函数图形。根据此选择合适的延时，以实现谱线增强。 2） 产生一个 序列。选择合适的 值。让 通过谱线增强器。画出输出信号 和误差信号e(n)的波形，并分别与 和 比较。 (Computer Experiments: 1. Consider an AR process x(n) defined by the difference equation where v(n) is an additive white noise of zero mean and variance .The AR parameters and are both real valued: a) Calculate the noise variance such that the AR process x(n) has unit variance .Hence , generate different realization of the process x (n). b) Given the input x (n), an LMS filter of length M = 2 is used to estimate the unknown AR parameters and . The step size is assigned the value 0.05. Compute and plot the ensemble average curve of and by averaging the value of parameters and over an ensemble of 100 different realization of the filter. Calculate the time constant according to the experiment results and compare with the corresponded theoretical value. c) For one realization of the LMS filter, compute the prediction error And the two tap-weight errors and Using power spectral plots of , show that)

里面是关于通信中同步技术的一些试验模型，主要有bpsk和qpsk的simulink仿真(Which is about the communication synchronization of some experimental models, mainly bpsk and qpsk the simulink simulation)

课程设计需要运用MATLAB编程实现2ASK,2FSK,2PSK，2DPSK调制解调过程，并且输出其调制后的波形，画出频谱、功率谱密度图，并比较各种调制的误码率情况，讨论其调制效果。(Curriculum design requires the use of MATLAB programming 2ASK 2FSK, 2PSK 2DPSK modulation demodulation process and output modulated waveform, draw the spectrum, power spectrum density map and compare various modulation BER discuss its modulation effect.)

说明：  《Matlab从入门到精通》所有的源程序。(《Matlab from entry to the master》 all of the source.)

通过这个程序可以设计一个IIR滤波器，对滤波器的系数按4bit量化。(Through this program can design an IIR filter)

自适应滤波器，求解性能误差曲面和等值曲线，最陡下降法和LMS算法的比较，(Adaptive filter, the solution surface and contour error performance curve, the steepest descent method and the LMS algorithm,)

最小二乘回归分析算法，进行逐步线性回归，实现了图像的加水印，去噪，加噪声等功能。( Least-squares regression analysis algorithm, Stepwise linear regression, Realize image watermarking, de-noising, plus noise and other functions.)

光伏并网逆变器，额定功率为200w，前级通过交错反激实现升压，后级通过逆变全桥完成逆变最后实现并网。(Photovoltaic grid-connected inverter, rated power 200w, the first stage boost through the boost, the latter through the inverter bridge to complete the inverter and finally achieve grid-connected.)

检测纠正ECG检测中qrs波的误检率和漏检率，以提供qrs波的检测效率。(Detected and corrected ECG wave detection qrs false detection rate and false negative rate, in order to provide qrs wave detection efficiency.)

最强大的QPSK、16QAM程序，可以生成QPSK、16QAM程序的Matlab仿真程序，注释十分详细，可直接运行或调用使用！已测试，可使用！(The most powerful QPSK, 16QAM program that can generate QPSK, 16QAM program Matlab simulation program, very detailed comments can be run directly or call use! Have been tested, you can use!)