Questions tagged [equalization]
162 questions
11
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1 answer
General questions on the CMA equalizer
So I recently implemented a CMA equalizer in MATLAB that uses method of steepest descent to converge to the minimal cost. (Im on an equalizer implementation binge).
My questions are the following:
1) It seems to me that the CMA algorithm is only…
Spacey
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4
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1 answer
What is the difference between pulse shaping and equalizers when used to cancel Inter-symbol Interference (ISI)?
According to Nyquist, to transmit R symbols/sec without ISI, the minimum bandwidth required is R/2 Hz, and the sinc pulse shape satisfies this condition.
If we use equalizers instead of pulse shaping, do we need to keep this condition ( minimum…
Mohamed Aly
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3
votes
1 answer
What is the difference between an equalizer and a channel estimator?
I was wondering what is the difference between channel estimator and channel equalizer?
Thanks!
Zara
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1
vote
3 answers
How are the reflections in a quarter wavelength transformer dealt with in signal processing?
I haven't seen this issue ever explicitly discussed.
Briefly, reflections cannot be avoided in a quarter wave transformer due to the characteristic impedance not matching the source or the load. In the resting state, one a frequency has been applied…
Lewis Kelsey
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1
vote
1 answer
spectral factorization method
So I'm trying to figure out a method to do spectral factorization, where we take some function $X(D) = (1+cD)(1+cD^{-1})$. I believe this is used in equaliation I can do this if I just plugging in numbers until i get something that works, but that…
gerrgheiser
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0
votes
1 answer
Decision Feedback Equalizer initialization
Suppose I want to implement only via software on matlab a DFE.
I am studying the decision feedback equalizer but some slightly more practical concepts are not very clear to me from the theory.
Specifically:
How do I choose the number of taps…
KaleM
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0
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0 answers
Compensating for poor illumination across a specific image axis - possible solutions?
A friend of mine is working at an institute for nano-membranes. Currently they are using ImageJ and do a lot of manual (in my opinion inaccurate) work to process some membrane "photos" (images generated by a measurement process, I have remove the…
rbaleksandar
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0
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When and how can multiple EQ filters be merged into one?
As I understand it, it should be possible to merge similar filters, e.g. if I have two shelving filters with the same Q and frequency but different gains, I can just merge them into one by adding the gains, and it will have the same effect as two.…
mojuba
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