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复件 noisechk
- 可对噪声处理后的心电数据进行评价，既噪声的估计，用信噪比来评价的-noise can be dealt with right after the ECG data for evaluation, we estimate the noise used to evaluate the SNR
zhengxianfft
- 正弦信号进行傅里叶变换，估计其在不同信噪比下的均值方差，并画出图形-Some interpolated Discrete Fourier Transform (DFT) methods are analyzed and estimate the different frequency under the vary SNR.
Source_No_GDE_Prob_vs_SNR_ULA
- 该程序用盖氏圆盘方法（GDE）计算均匀直线阵（ULA）中信号源个数估计性能随SNR的变化情况,采用Monte-Carlo模拟。 -estimate the number of source using GDE criterion
FFT
- 利用FFT估计正弦信号的频率,要估计一个叠加了高斯白噪声的正弦信号 的频率 ，可以通过对x(n)做傅里叶变换，得到频谱图，找出幅度的最大值对应的频率值 ，进行多次变换，求出均方误差 。改变信噪比SNR，通过仿真可以得出随着信噪比增加，均方误差减小。-Sinusoidal signal using FFT frequency estimation, to estimate a Gaussian white noise superimposed on the frequency of sinusoi
3
- 摘要:为了提高图像复原算法的性能 ,提出了一种改进的奇异值分解法估计图像的点扩散函数。从图像的退化离散模型 出发 ,对图像进行逐层分块奇异值分解 ,并自动选取奇异值重组阶数以减少噪声对估计的影响。利用理想图像奇异值向 量平均能谱指数模型 ,估计点扩散函数奇异值向量的频谱 ,再反傅里叶变换得到其时域结果。实验结果表明 ,该方法能 在不同信噪比情况下估计成像系统的点扩散函数 ,估计结果比原有估计方法有所提高 ,有望为图像复原算法的预处理提 供一种有效的手段。-Abstract : T
cdma_in_matlb
- cdma function used to estimate snr vesus diffrent parametrs like fading and no of users
snrestimationinMRI
- to estimate snr in MRI
01576960Beaulieu
- 通过MATLAB软件；通过仿真得出性能曲线；从而比较bpsk的性能-The bit-error rate (BER) of binary phase-shift keying in Rayleigh fading, using the Alamouti transmission scheme and receiver selection diversity in the presence of channel-estimation error, is studied. Closed-
noise_reduction_technique
- duction techniques proposed in the art are expressed as a spectral gain depending on the a priori SNR. In the well-known decision- directed approach, the a priori SNR depends on the speech spec- trum estimation in the previous frame. As a conse
offset
- estimate offset time for pulse that modulate in bpsk and compare pe to snr with without offset . we assume offset is between 0 to 4
ABlindEstimationAlgorithmforPNSequenceinDSSSSignal
- 这是一篇很好的有关信道估计的文章， 可以用来快速的了解信道估计的基本内容-In this paper, a method for fast blind estimation of DS-SS signal is proposed which aims at the Direct-Sequence Spread- Spectrum (DS-SS) signals with parameters unknown. Considering the characteristic th
basic_iterative
- This is a matlab program using the most-likelihood method to estimate the frequency of a sinusoid wave. Also, a basic filter is provided to check the benefit from using that. The result show that ML method reacches CRB at normal SNR.
iterative_SNR_est
- This is a matlab program using the most liklihood method to estimate the SNR of a sinusoid wave. The experiment shows that it works well at normal SNR, while the noise is Gausian.
GMSK
- 对于给定信噪比的通信系统，估计差错概率,数据调制采用GMSK-Estimate error probability for a given SNR communications system,the data modulation method is GMSK
MP_DOA
- 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 e
MIMORadarDOAEstimation
- MIMO雷达模型下一种子空间谱估计方法，采用过估计的方法，以避免信源数估计的问题，直接对数据协方差矩阵进行变换，从而构造了信号子空间投影矩阵和噪声子空间投影矩阵，不需要像经典的MUSIC一样对其进行特征分解，完全避开了在一般非理想情况下MUSIC算法必须面对的识别小特征值与大特征值的麻烦，降低了复杂度，而且该方法不受快拍数的影响，在相干源情况下也能准确的估计目标的入射角，不会出现伪峰。-A subspace based DOA (Direction-Of-Arrival) estimation
mysnr
- 一种信噪比估计的方法，在瑞利信道下，对数字基带信号的信噪比估计。-A SNR estimation method under the Rayleigh channel, the digital baseband signal to noise ratio estimate.
matlab
- 利用mcra的方法对噪声功率谱估计达到语音增强的目的-estimate the spectrum of the noise in order to enhance the SNR of the speech
powersubtractionalgo
- Matlab Code to suppress estimate PSD, Noise in speech and minimise it and thus improve SNR
OFDM-channel-estimate
- 本程序给出了OFDM信道的仿真，直接运行主函数OFDM_test即可，给出了信道BER随SNR的关系。-This procedure gives a simulation of OFDM channel and run directly the main function OFDM_test can, given the relationship between the channel BER with SNR.