Description: 如何在图像中加入某一固定snr的噪声？分类:matlab与图像处理
在利用matlab做一些自己算法的抗噪分析中，常常会遇到这个问题，matlab中的加噪函数是imnoise，里面的参数是噪声的均值，方差（高斯噪声）或者是感染概率（椒盐噪声），参数不能是snr值，但是很多国外的文章的噪声分析中都是用snr值来衡量加入噪声的程度的-how the image to a fixed snr noise? Categories : Matlab and image processing using Matlab to do some of his own anti-noise algorithm analysis, will often encounter this problem, which Matlab the noise function is imnoise. inside the parameters of the noise mean and variance (Gaussian noise) or the probability of infection (Impulse Noise) Parameter values can not be snr, But many foreign article noise analysis is used to measure the value snr joined the extent of noise Platform: |
Size: 2048 |
Author:顶替 |
Hits:
Description: This program includes:
[5 7] convolutional code (encoder) + BPSK + AWGN + MAP (decoder). It evaluates Bit Error Rate and plots it versus SNR(signal to Noise Ratio).
-This program includes:
[5 7] convolutional code (encoder)+ BPSK+ AWGN+ MAP (decoder). It evaluates Bit Error Rate and plots it versus SNR(signal to Noise Ratio).
Platform: |
Size: 1024 |
Author:阳关 |
Hits:
Description: 小波软阈值去噪的MATLAB代码,输入噪声均值就可得出含噪图像和去噪图像,同时得出峰值信噪比.-Wavelet soft-threshold denoising of MATLAB code, the mean input noise with noise will get the images and de-noising images, peak signal to noise ratio obtained at the same time. Platform: |
Size: 197632 |
Author:罗凯 |
Hits:
Description: 求信噪比的MATLAB源代码 很实用的函数-Signal to noise ratio for the MATLAB source code is very useful function Platform: |
Size: 1024 |
Author:小兔兔牙 |
Hits:
Description: [LDPC码]是LDPC码相关论文
[WuYuFei]中是WuYuFei的论文
[WuYufei_matlab]是WuYufei做Turbo码的Matlab程序
程序实现在固定信噪比和卷积长度的条件下，计算不同正常的帧错误概率和比特错误概率
turbo_sys_demo.m是主程序
其中trellis.m是构造网格的子程序
logmapo.m是LOGMAP译码算法子程序
sova0.m是SOVA译码算法子程序
encoderm.m是编码子程序
[22]是以WuYufei程序的改动，实现在帧长、信噪比和迭代次数固定的情况下，获得两个译码器的先验信息的变化情况
http://www.pudn.com
-[LDPC Code] LDPC code is a relevant paper [WuYuFei] is WuYuFei paper [WuYufei_matlab] is to do WuYufei procedures Turbo Codes Matlab program signal to noise ratio at a fixed length and convolution conditions, different normal frame error probability and the bit error probability is turbo_sys_demo.m main structure of which is trellis.m grid is logmapo.m Subroutine Subroutine LOGMAP decoding algorithm is the SOVA decoding algorithm sova0.m Subroutine Subroutine encoderm.m coding [22 ] WuYufei procedure is based on changes in帧长realize, signal to noise ratio and a fixed number of iterations circumstances, the acquisition of two decoder a priori information changes http://www.pudn.com Platform: |
Size: 1771520 |
Author:李灵 |
Hits:
Description: 使用MATLAB完成CDMA系统的相关接收机，其中哈达码矩阵为128阶，仿真比特信噪比为-10DB-CDMA system using MATLAB to complete the relevant receivers, which Hadamard matrix of 128 bands, simulation-10DB-bit signal to noise ratio for Platform: |
Size: 1024 |
Author:王莉 |
Hits:
Description: The software is capable to simulate space time code [1] for QPSK modulation using different number of state. Examples of generator matrix up to 256 stetes are provided. Variable signal to noise ratio (SNR) might be applied to produce bit error rate (BER) or frame error rate (FER) curves.-The software is capable to simulate space time code [1] for QPSK modulation using different number of state. Examples of generator matrix up to 256 stetes are provided. Variable signal to noise ratio (SNR) might be applied to produce bit error rate (BER ) or frame error rate (FER) curves. Platform: |
Size: 10240 |
Author:zhouyu |
Hits:
Description: 提出了一个采用(2,1,7)卷积码+QPSK的中频调制解调方案,并在Xilinx公司的100万
门FPGA芯片上实现了该系统。该系统在信噪比SNR为6dB左右时可实现速率超过1Mbit/s、误码率
小于10-5的数据传输。
-Proposed a use of (2,1,7) convolutional code+ QPSK modulation and demodulation of the IF program, and in Xilinx' s FPGA chip one million on implementation of the system. The system SNR to 6dB signal to noise ratio at about the rate may achieve more than 1Mbit/s, less than 10-5 bit error rate of data transmission. Platform: |
Size: 62464 |
Author:张同星 |
Hits:
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 Platform: |
Size: 3072 |
Author:宁菲菲 |
Hits:
Description: 图像处理，图像的峰值信噪比PSNR，matlab代码例程，验证可用-Image processing, image the peak signal to noise ratio PSNR, matlab code routines can be used to verify Platform: |
Size: 1024 |
Author:陈阳 |
Hits:
Description: capon波束形成是阵列信号处理的经典算法，该算法用于抑制干扰噪声，提高期望信号的信噪比。
本人用VC6.0实现了该算法，同时在该程序里提供了比较多的用于数值计算的C代码，如特征值分解等。-capon beamforming is a classic array signal processing algorithm used to suppress noise interference and improve signal to noise ratio of desired signal. I used VC6.0 to achieve the algorithm, at the same time in the program provide a lot more for the numerical calculation of the C code, such as such as eigenvalue decomposition. Platform: |
Size: 20480 |
Author:winton |
Hits:
Description: a simple mimo code using 2*2 transmitter and antenna. and measure the bit error rate performance based on the signal to noise ratio Platform: |
Size: 1024 |
Author:Yuqun |
Hits:
Description: 此代码是小波零树算法的matlab实现程序，子程序较为齐全，包括最后计算压缩图像的峰值信噪比和压缩效果的源码。-This code is the wavelet zero-tree algorithm matlab implementation procedures, subroutines are more complete, including the final calculation of the peak signal to noise ratio and the compressed image compression source. Platform: |
Size: 265216 |
Author:waker |
Hits:
Description: 基于小波变换的图像压缩代码，包括压缩比、运行时间和计算复原图像的峰值信噪比-Image compression based on wavelet transform code, including compression ratio, operation time and recovery images of the peak signal to noise ratio calculation Platform: |
Size: 413696 |
Author:刘灿 |
Hits:
Description: it is a code in MATLAB for calculation of bit error ratio vs signal to noise ratio , for multiuser code division multiple access .. usually in any communication system calculation of BER is very important to know the performance of system .. so in this program multiuser CDMA system is used ,, spreading is done using HADAMARD matrix .. or WALSH code .. and BER vs SIGNAL to NOISE ratio graph is computed-it is a code in MATLAB for calculation of bit error ratio vs signal to noise ratio , for multiuser code division multiple access .. usually in any communication system calculation of BER is very important to know the performance of system .. so in this program multiuser CDMA system is used ,, spreading is done using HADAMARD matrix .. or WALSH code .. and BER vs SIGNAL to NOISE ratio graph is computed Platform: |
Size: 2048 |
Author:hassan |
Hits:
Description: 预先设定载频、采样率、码速率、信息代码个数和信噪比等参数，进行FSK信号的调制解调。-Pre-set carrier frequency, sampling rate, bit rate, information, code number and signal to noise ratio and other parameters for FSK signal modulation and demodulation. Platform: |
Size: 1024 |
Author:马汪 |
Hits:
Description: 设计一个有干扰的直接序列扩频通信系统， PN码由m序列产生器产生，经过高斯白噪声信道。在接收端接收到的信号包括“有用信号+高斯白噪声+干扰”，将接收信号进行解扩，判决，得到用户的信号检测结果，绘制不同的扩频增益（增益值为10，30，50）下，误比特率随信噪比Eb/N0的变化曲线。-Design of a direct sequence spread spectrum interference system, PN code generated by the m sequence generator, after white Gaussian noise channel. Receives the signal at the receiver, including " useful signal+ Gaussian white noise+ interference" , will receive the signal despreading, judgments, get the user' s signal test results, draw a different spreading gain (gain value of 10,30, 50), the BER curves with the signal to noise ratio Eb/N0. Platform: |
Size: 7168 |
Author:皓月 |
Hits:
Description: 广义球形解码源代码，包括信噪比、复杂度、以及天线数量各种参数的仿真-Generalized sphere decoder source code, including signal to noise ratio, complexity, and various parameters of the simulation the number of antennas Platform: |
Size: 29696 |
Author:刘超 |
Hits:
Search - signal to noise ratio matlab code