Statistics is the study of the collection, organization, analysis, and interpretation of data.
4
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0answers
32 views
Getting error in fit
I was wondering if anyone had run into the problem of trying to estimate errors in their signal processing on spectroscopic data. I know that many people use spectroscopic techniques to estimate ...
1
vote
1answer
54 views
Fisher ratio or F_ratio
I am confused while writing code to implement Fisher’s F-ratio.
Suppose I have 4 speakers, each speaker pronounces 2 words and each word has 3 frames and each frame has 30 sub-bands.
$u$ is mean of ...
0
votes
1answer
65 views
what is probability density function (PDF) of periodic signal
anybody knows what is the best pdf for periodic signal ?
I have signal with 480 samples (16000*0.03=480) but I could not find the exact pdf for that. sometimes it appear like 2 mixed Gaussian.
4
votes
2answers
84 views
Scatter plot: calculate box where 80 % of the points are
I've a scatter plot with x- and y-axis.
Now I want to calculate a rectangle which displays where 80% of the points in this plot are.
I'm not very familiar with statistics, so I don't know the method ...
1
vote
1answer
49 views
Amplitude calculation
I've got an array of different values representing the y-values in a plot:
...
0
votes
2answers
40 views
Expected value of a Delta function times a function
I have a output signal $Y(t)= \sum_{n=-\infty}^{\infty} Z_n \delta (t-n\tau) h(t)$ and $Z_n$ is a random variable with equal probability to be $+-1$ and h(t) is $sinc(\frac t {\tau})$
and the ...
4
votes
0answers
55 views
What is a good distance measure for matching SIFT descriptors depending on the distribution of their noise?
I have read some papers about distance measures like Euclidean, Manhattan or Chi-Square for matching gradient based image descriptors like those computed from the SIFT Algorithm (128-D vectors). Most ...
1
vote
1answer
74 views
Establishing the function of a decaying signal
I have a set of samples from a signal. The signal is erratic in behaviour at the beginning but then it settles down and oscillates around the value of 100 (the frequency of oscillation is not ...
2
votes
0answers
45 views
Relative beat detection for two audio recordings
I'm trying to synchronize (overlap) two audio recordings of the same song: a complete HQ version, and an incomplete, noisy version (phone recording for example). The noisy recording may have had its ...
2
votes
1answer
178 views
Signal Processing in Amateur Radio Astronomy
I am an amateur astronomer and I took recent interest in Radio astronomy and I am also new to Digital Signal Processing. My team is trying to build a radio telescope. I am interested in the data ...
3
votes
2answers
188 views
Can Kalman Filter be used to track Randomly Moving Target?
i want to track random moving object with a camera using kalman filter...i have the following questions...
Randomly moving target means $Corelation(t) = E[ x(T)x(T+t) ]$ is very low...where $x(T)$ ...
3
votes
1answer
168 views
FFT, How to decide if there is a signal among noise?
I have sets of data of different deep sky objects. My job is to check for any periodicity.
I use IDL to run an FFT and wavelet methods to check for a signal. To test my code I ran the IDL built in ...
5
votes
5answers
303 views
Good book or reference to learn Kalman Filter
I am totally new to the Kalman filter. I've had some basic courses on conditional probability and linear algebra. Can someone suggest a good book or any resource on the web which can help me can ...
3
votes
1answer
69 views
Characterizing real-time sampled signal
I have a signal which is sampled in real-time. At every time interval I receive a value. I need to characterize this signal as active or inactive (to take priority in the control actions). By active ...
1
vote
0answers
33 views
Statistical Signal Analysis - what to read [duplicate]
Possible Duplicate:
Introduction to Statistical Signal Processing
Currently I am doing an (undergrad) class on statistical signal analysis, but I find the reader at hand (no book, buh) very ...
2
votes
0answers
56 views
Predicting Positional Displacement with a Bivariate Gaussian Distribution
In my computer-vision problem, a blob can move either forward or backwards (with a slight chance of moving sideways) along its directional axis. I am seeking a bivariate model because I need to ...
3
votes
3answers
161 views
How to estimate the mean of a clipped signal?
An accelerometer is used on a high vibration environment (a bicycle) to measure gravity. The signal clips, so data higher than a clipping value is clamped to that value.
So, simply filtering the ...
7
votes
3answers
440 views
How to Average Complex Responses (and Justification)?
I am developing software that calculates the response of a system by comparing the FFT of input and output signals. The input and output signals are divided into windows and, for each window, the ...
6
votes
0answers
269 views
Ensemble learning, multiple classifier system
I am trying to use a MCS (Multi classifier system) to do some better work on limited data i.e become more accurate.
I am using K-means clustering at the moment but may choose to go with FCM (Fuzzy ...
4
votes
1answer
1k views
How can I calculate the Expectation for a particular known vector?
Let's say I have a row vector $X = [x1, x2, x3, ..., xn]$ and another row vector $Y = [y1, y2, y3, ..., yn]$. I want to check whether the two vectors are statistically independent or not.
Now two ...
11
votes
4answers
1k views
ICA - Statistical Independence & Eigenvalues of Covariance Matrix
I am currently creating different signals using Matlab, mixing them by multiplying them by a mixing matrix A, and then trying to get back the original signals using FastICA.
So far, the recovered ...
10
votes
4answers
2k views
Determining the mean and standard deviation in real time
What would be the ideal way to find the mean and standard deviation of a signal for a real time application. I'd like to be able to trigger a controller when a signal was more than 3 standard ...
6
votes
1answer
127 views
How to discern the distribution function of mean-squared coherence values?
This probably walks a fine line between Cross Validated and this site, but I think the practical application of it lies more on the signal processing side.
I have had the occasion to record some EEG ...
