Search - Db matlab

Search - Db matlab - List

[Other] xiaobo DL : 0: 局部放电试验所采集的信号中往往混有白噪声、周期干扰信号去除。此处采用常用db系列小波中的db6小波进行9尺度的多分辨分解后，根据白噪声能量特性，估算各尺度的阈值大小，采用硬值进行处理，后进行重构。-Partial discharge test of the signal collected is often mixed with white noise, periodic interference signal removal. Here the use of commonly used wavelet db Series DB6 wavelet carried out in the 9-scale multiresolution decomposition, based on the energy characteristics of white noise to estimate the scale threshold size, the use of hard-value deal, after the remodeling.
Date : 2026-01-02 Size : 33kb User : rex
[Other] MATLAB DL : 0: A 2by3 MIMO model using Simulink. The decoder uses zero forcing algorithm. Set in the workspace the modulation order (QAM modulation), Doppler shift, SNR in dB, bit rate, sample per frame, max number of bits and max number of errors before running the simulation. Works also with BERTool but change the BER variable to ErrorVec. Included in the file a BER session with multiple runs and a figure for several runs.
Date : 2026-01-02 Size : 69kb User : flash
[Other] THE3 DL : 0: a Matlab code that produces a plot of probability of bit error rate for QPSK versus SNR for three receive antennas, and three different combining methods: MRC, equal gain combining, and selection combining. The plot is generated by using Monte Carlo simulation. The SNR in this plot is the single-antenna average signal-to-noise ratio, and range from -5 dB to 15 dB.
Date : 2026-01-02 Size : 1kb User : mozhii
[Other] LSDE DL : 0: 应用matlab求解线性随机微分方程dx(t)=sin(x(t))+sigma*dB(t)的输出结果。-generates outcomes of solutions of the SDE dx(t)=sin(x(t))+sigma*dB(t)
Date : 2026-01-02 Size : 1kb User : Lilin
[Other] ber DL : 1: 使用预定义函数erfc在MATLAB中构建Q函数。在相同的图中绘制分析BER对于BPSK和QPSK的Eb / N0（0-15 dB）(Build a Q-function in MATLAB using a predefined function erfc. Plot the analytical BER vs. Eb/N0 (0-15 dB) for BPSK and QPSK in the same figure)
Date : 2026-01-02 Size : 7kb User : 呼哧呼哧
[Other] VLCBER DL : 0: 调制技术 ,计算误码率，采用PPM调制技术，单位是db(Modulation techniques to calculate bit error rate, the use of PPM modulation technology, the unit is db)
Date : 2026-01-02 Size : 2kb User : 西西真棒
[Other] music DL : 0: MUSIC 算法MATLAB仿真源代码 clc clear all format long %将数据显示为长整型科学计数 N=200;%快拍数 doa=[20 60]/180*pi; %信号到达角 w=[pi/4 pi/3]';%信号频率 M=10;%阵元数 P=length(w); %信号个数 lambda=150;%波长 d=lambda/2;%阵元间距 snr=20;%信噪比 B=zeros(P,M); %创建一个P行M列的0矩阵 for k=1:P B(k,:)=exp(-j*2*pi*d*sin(doa(k))/lambda*[0:M-1]); %矩阵赋值 end B=B'; xx=2*exp(j*(w*[1:N])); %仿真信号 x=B*xx; x=x+awgn(x,snr);%加入高斯白噪声 R=x*x'; %数据协方差矩阵 [U,V]=eig(R); %求R的特征值和特征向量 UU=U(:,1:M-P); %估计噪声子空间 theta=-90:0.5:90; %%谱峰搜索 for ii=1:length(theta) AA=zeros(1,length(M)); for jj=0:M-1 AA(1+jj)=exp(-j*2*jj*pi*d*sin(theta(ii)/180*pi)/lambda); end WW=AA*UU*UU'*AA'; Pmusic(ii)=abs(1/ WW); end Pmusic=10*log10(Pmusic/max(Pmusic)); %空间谱函数 plot(theta,Pmusic,'-k') xlabel('角度 \theta/degree') ylabel('谱函数P(\theta) /dB') title('MUSIC算法的DOA估计谱') grid on(MUSIC algorithm MATLAB simulation source code)
Date : 2026-01-02 Size : 15kb User : 冠华
[Other] 1 DL : 0: 1. 针对推挽结构MZ-LiNbO3调制器；（1）通过MATLAB编程画出输出电场、输出功率传递函数随外加波导两臂相位差的变化曲线；（2）确定相位调制器、强度调制器的偏置电压；（3）假设理想条件下强度调制器消光比为20dB，通过MATLAB编程画出消光比曲线随3dB耦合器分光比的变化。（分光比R=0.45:0.05:0.55）(1. For push-pull MZ-LiNbO3 modulator; (1) The curves of the output electric field and the output power transfer function with the phase difference between the two arms of the external waveguide are drawn by MATLAB programming. (2) Determine the bias voltage of phase modulator and intensity modulator; (3) Assuming that the extinction ratio of intensity modulator is 20 dB under ideal conditions, the extinction ratio curve of intensity modulator varies with the splitting ratio of 3dB coupler by MATLAB programming. (Spectrum ratio R = 0.45:0.05:0.55))
Date : 2019-07-25 Size : 76kb User : wq2019