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Description: 两个常用的数字水印评价函数：信躁比比（SNR）和峰值信躁比（PSNR）-two commonly used digital watermarking evaluation function : Oh habibi letter (SNR) and peak letter impatient than (PSNR)
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Size: 1336 |
Author: 东东 |
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Description: 两个常用的数字水印评价函数：信躁比比（SNR）和峰值信躁比（PSNR）-two commonly used digital watermarking evaluation function : Oh habibi letter (SNR) and peak letter impatient than (PSNR)
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Size: 1024 |
Author: 东东 |
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Description: Peak Signal to Noise Ratio
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Size: 72704 |
Author: joe |
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Description: 对图像进行二维离散小波变换, 变换级数大于等于3级, 并进行重构, 最后计算重构图像的峰值信噪比(PSNR).-images of two-dimensional discrete wavelet transform, transform Series is greater than or equal to 3, and reconstruction, Image Reconstruction final calculation of the peak signal-to-noise ratio (PSNR).
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Size: 2048 |
Author: 廖鑫鹏 |
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Description: 实现PSNR的MATLAB代码，功能是比较两图象的峰峰值。-achieve PSNR MATLAB code is more functional image of the two-peak.
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Size: 829440 |
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Description: TC35i新版西门子工业GSM模块是一个支持中文短信息的工业级GSM模块,工作在EGSM900和GSM1800双频段,电源范围为直流3.3～4.8V ,电流消耗——休眠状态为3.5mA，空闲状态为25mA，发射状态为300mA(平均)，2.5A峰值；可传输语音和数据信号, 功耗在EGSM900(4类)和GSM1800(1类)分别为2W和1W ,通过接口连接器和天线连接器分别连接SIM卡读卡器和天线。SIM电压为3V/1.8V，TC35i的数据接口(CMOS电平)通过AT命令可双向传输指令和数据,可选波特率为300b/s～115kb/s , 自动波特率为1.2kb/s～115kb/s。它支持Text和PDU格式的SMS(Short Message Service,短消息),可通过AT命令或关断信号实现重启和故障恢复-The new industrial GSM Siemens TC35i module is a short message in support of the Chinese industrial grade GSM module, working in EGSM900 and GSM1800 dual band, power range of DC 3.3 ~ 4.8V, current consumption- dormant for 3.5mA, idle to 25mA, launch status 300mA (average), 2.5A peak can transmit voice and data signals, power consumption in the EGSM900 (4) and GSM1800 (1 category) were 2W and 1W, through the interface connector and antenna connector connected SIM card reader and antenna. SIM voltage 3V/1.8V, TC35i data interface (CMOS level) through the AT command can be bi-directional command and data transmission, an optional baud rate is 300b/s ~ 115kb/s, auto-baud rate is 1.2kb/s ~ 115kb/s. It supports Text and PDU format of SMS (Short Message Service, Short Message Service), available through AT commands, or turn-off signal to achieve the resumption and Recovery
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Size: 816128 |
Author: 003344 |
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Description: 一个计算2副图像之间的峰值信噪比（PSNR）的matlab程序。-A calculation between two images of the peak signal to noise ratio (PSNR) of the matlab program.
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Size: 30720 |
Author: chenkaizhi |
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Description: 求图像峰值信噪比，可以用于图像质量的评估。-Peak signal to noise ratio for images that can be used for image quality assessment.
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Size: 1024 |
Author: 刘坤 |
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Description: 计算两幅图像的SNR信噪比的源代码MATLAB版-Calculation of two images PSNR peak signal to noise ratio of the source code version of MATLAB
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Size: 3072 |
Author: 宁菲菲 |
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Description: 图片求信噪比和峰值信噪比的源码，编译环境VC-Order to signal to noise ratio and peak signal to noise ratio images of the source code, build environment VC
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Size: 1987584 |
Author: inID |
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Description: 小波插值（全小波插值，小波双线性插值，小波双三次插值及其改进）放大图像，提高图像的分辨率；对插值图像做质量评价（峰值信噪比PSNR；均方信噪比SNR）-Wavelet interpolation (full wavelet interpolation, wavelet bilinear interpolation, cubic interpolation and improved method) to enlarge the image and improve image resolution assesse the interpolation image (peak signal to noise ratio PSNR mean square signal to noise ratio SNR)
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Size: 1024 |
Author: zhoujianhua |
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Description: 这是一个图像信噪比计算的小程序，不是峰值信噪比，请注意。-This is a small program SNR calculation, not the peak signal to noise ratio, please note.
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Size: 1024 |
Author: wang |
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Description: This M Code simulate the effects of clipping and filtering on PAPR reduction in OFDM-based wireless standard.Also the performance of BER versus SNR of original OFDM signals with PAPR reduction based on clipping and filtering schemes over AWGN channel is evaluated.
The simplest and most widely used technique of PAPR reduction is to basically clip the part of signals that are outside the allowed region.Clipping methode introduces both in band distortion and out of band radiation into OFDM signals which degrades the performance including the BER and spectral efficiency.Filtering can reduce out of band radiation after clipping although it can not reduce in-band radiation distortion.However, clipping may cause some peak regrowth so that the signal after clipping and filtering will exceed the clipping level at some point.To reduce peak regrowth a repeated filtering and clipping operation can be used to obtain a desirable PAPR at a cost of computational complexity increase.
-This M Code simulate the effects of clipping and filtering on PAPR PAPR reduction in OFDM-based wireless standard.Also the performance of BER versus SNR of original OFDM signals with PAPR reduction based on clipping and filtering schemes over AWGN channel is evaluated.
The simplest and most widely used technique of PAPR reduction is to basically clip the part of signals that are outside the allowed region.Clipping methode introduces both in band distortion and out of band radiation into OFDM signals which degrades the performance including the BER and spectral efficiency.Filtering can reduce out of band radiation after clipping although it can not reduce in-band radiation distortion.However, clipping may cause some peak regrowth so that the signal after clipping and filtering will exceed the clipping level at some point.To reduce peak regrowth a repeated filtering and clipping operation can be used to obtain a desirable PAPR at a cost of computational complexity increase.
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Size: 11770880 |
Author: shahram |
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Description: 针对多径效应的影响，提出了一种基于矩阵束的MIMO 雷达低仰角快速估计方法。该方法同时考虑了发射多径信号和接收多径信号，采用单样本数信号矢量构造了一个前后向矩阵束，并利用两个酉矩阵对该矩阵束进行降维处理，最后采用广义特征值分解的总体最小二乘法来估计目标角度。算法不需要估计数据协方差矩阵，可在低
信噪比和单样本数情况下，有效地克服多径效应，实现同时多目标低仰角估计，相比最大似然算法，避免了谱峰搜索，计算量小。仿真结果验证了该算法的有效性。-To overcome the multipath effect, a fast algorithm for low elevation estimation for MIMO radar via matrix pencil is proposed. The signals both in transmit multipath and receive multipath are considered. Firstly, a forward-backward matrix pencil is formed based on the single-sampled vector. Secondly, the reduced-dimensional processing is applied to the matrix pencil via two unitary matrices. Finally, the generalized eigen-decomposition is employed to estimate the low elevation in multipath environments directly. Without the covariance matrix estimation, the proposed method can overcome multipath effect effectively in case of low SNR and estimate multi-target simultaneously. Compared with Maximum Likelihood (ML) method, it avoids spectrum peak searching and reduces the computational burden. Numerical results verify the effectiveness of this method
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Size: 254976 |
Author: |
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Description: clc
img = imread( lena.bmp )
JPEG compression
jpegcompression(img, lena_compressed.mat )
JPEG decompression
Irec = jpegrestoration( lena_compressed.mat )
System performances
[CR,BPP,PSNR,MSE,SNR] = systemperformances(img,Irec, lena_compressed.mat )
Plotting
figure,subplot(1,2,1),imshow(img),title( Original image ),...
subplot(1,2,2),imshow(Irec),title( Compressed image )
disp( Compression ratio: )
disp(CR)
disp( Bits per pixel: )
disp(BPP)
disp( Peak signal to noise ratio: )
disp(PSNR)
disp( Mean squared error: )
disp(MSE)
disp( Signal to noise ratio )
disp(SNR) -clc
img = imread( lena.bmp )
JPEG compression
jpegcompression(img, lena_compressed.mat )
JPEG decompression
Irec = jpegrestoration( lena_compressed.mat )
System performances
[CR,BPP,PSNR,MSE,SNR] = systemperformances(img,Irec, lena_compressed.mat )
Plotting
figure,subplot(1,2,1),imshow(img),title( Original image ),...
subplot(1,2,2),imshow(Irec),title( Compressed image )
disp( Compression ratio: )
disp(CR)
disp( Bits per pixel: )
disp(BPP)
disp( Peak signal to noise ratio: )
disp(PSNR)
disp( Mean squared error: )
disp(MSE)
disp( Signal to noise ratio )
disp(SNR)
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Size: 189440 |
Author: neethumennie |
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Description: 计算均方误差MSE信噪比SNR峰值信噪比PSNR绝对平均误差的matlab函数-Calculate the mean square error MSE, SNR is the peak signal to noise ratio PSNR absolute average error of Matlab functions
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Size: 4096 |
Author: 新雨 |
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Description: 利用9元平面线阵对空间4个声源进行定位，信噪比为10db，music 算法，谱峰较尖锐-9 elements planar array to localize 4 signal DOAs, MUSIC method ,snr is 10db, well spectral peak
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Size: 1024 |
Author: vinghong |
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Description: 计算雷达的信噪比，其中pt表示峰值功率，freq表示雷达中心频率，g表示天线增益，sigma表示目标截面积，te表示有效噪声温度，b表示带宽，nf表示噪声系数，loss表示雷达损失，range表示目标距离，snr表示信噪比-Calculate the radar signal-to-noise ratio, wherein PT represents the peak power, freq said radar center frequency, g represents the antenna gain, Sigma represents the target cross-sectional area, te effective noise temperature, b represents the bandwidth, nf represents the noise factor, loss represents a radar losses, The range represents the target distance, SNR represents the signal to noise ratio
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Size: 1433600 |
Author: william |
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Description: 对三种不同数值的RCS和雷达峰值功率，SNR相对检测距离的曲线。-RCS and radar peak power for three different values of the the SNR relative detection distance curve.
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Size: 1024 |
Author: 福子昕 |
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Description: 包含去噪后经常用的评价指标，峰值信噪比，信噪比，相似度、等效视数，边缘保持指数-After uation often contain de-noising, the peak signal to noise ratio, SNR, similarity, ENL, edge retention index
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Size: 5120 |
Author: wangtiantian |
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