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Questions related from Gheorghe Zaharia
By coding the messages xi (i=1,2,…, N) of a finite information source X having the probabilities pi = p(xi) with letters yj (j=1, 2, …, D) of a finite coding alphabet Y, we obtain a new...
04 July 2023 2,189 1 View
If possible, each element of each matrix should be a*exp(-2k*pi/2n), (k, n = positive integers, a > 0) or zero.
14 December 2017 1,007 3 View
For measured data x = [x(1) x(2) … x(N)] affected by noise, smoothing is a usual choice. It is possible to use a uniform smoothing by replacing the initial value x(k) by the mean of the vector s =...
24 October 2017 8,158 1 View
Which is the most used parameter characterizing the HRV? If dk is the duration of the k-th R-R interval, the standard deviation of these dk values is a first possibility. Moreover, using dk, one...
04 October 2017 1,205 15 View
In order to validate a Doppler radar used for Heartbeat Rate and Heart Rate Variability extraction, an ECG (electrocardiograph) is often used as reference. Which is the accuracy of an ECG? Can be...
16 September 2017 9,062 13 View
I need to estimate the parametters of a binary, Markov information source observed via a binary, noisy channel. Do you know some references on this topic ?
03 October 2016 1,066 6 View
Is it possible to use Huffman coding on information sources with memory? If yes, then how? Do you know some references on this topic ?
13 September 2012 7,390 6 View
