Questions tagged [equalization]
The equalization tag has no usage guidance.
15
questions
3
votes
3answers
950 views
Berchin's FDLS arbitrary filter design algorithm
I'm trying to use Berchin's FDLS methods (for those that don't know what it is, it's a way to design arbitrary magnitude and phase of an IIR Eq)
I tried different things but neither gave me what i ...
0
votes
2answers
6k views
non linear equalizer vs linear equalizer
i understand that there are linear equalizers such as MMSE and ZF, however there are also non-linear equalizers such as MLD. i would like to know what is the difference between a non-linear equalizer ...
3
votes
1answer
2k views
MATLAB : Proper estimation of weights and how to calculate MSE for QPSK signal for Constant Modulus Algorithm
I had asked conceptual Question about Constant Modulus Algorithm. I am implementing the simple steps of the algorithm, as I do not have the cma() built in module.
...
2
votes
2answers
323 views
Fractional spaced equalizer + timing (clock) recovery
I am trying to figure out how timing recovery is used after equalization (or, being more correct, when the equalizer is in the timing recovery loop), having a T/2 fractional spaced equalizer and using ...
10
votes
2answers
551 views
Conditions for precoding matrix to preserve complex conjugate symmetry on DFT vector
Suppose there is a DFT vector $\mathbf{X}$ with length N, which presents complex conjugate symmetry around its middle point, i.e., $X(1) = X(N-1)^*$, $X(2) = X(N - 2)^*$ and so forth. $X(0)$ and $X(N/...
3
votes
2answers
3k views
Which filter for an audio equalizer
I’m new to DSP and I have to do an audio equalizer in c++.
I did a lot of research about it and tried some stuff in the last month, but I’m a little overwhelmed with all those informations and it’s ...
3
votes
1answer
4k views
Remove a frequency and all its multiple (harmonics)
In a soundfile, I'd like to remove a frequency and all its harmonics. What is the best solution in your opinion ?
Do a loop with 20 notch filters, one after another.
// f is the fundamental ...
2
votes
1answer
7k views
Use of equalizers in communication systems for Intersymbol Interference
In communication systems with high data rates, Intersymbol Interference (ISI) is a major problem (ISI).
I have read in books that one way to combat this problem is to use time domain equalizers (ZF, ...
1
vote
1answer
927 views
Given an FIR filter coefficients, how can I find coefficients of its equalizer filter?
I have an N-tap direct form complex FIR filter with known coefficients [c0 c1 .. cn]. I want to find the coefficients of its equalizer filter which when cascaded ...
5
votes
1answer
8k views
What does the one-tap equalizer used with OFDM accomplish?
I've read that OFDM normally uses a one-tap equalizer. It seems that a one-tap equalizer could only scale and delay a signal. Why is this useful?
I thought multipath was handled through the cyclic-...
4
votes
1answer
782 views
Matlab: What should be the BER performance for BPSK using Constant Modulus Algorithm equalizer
I need help in plotting the Bit error curve or the symbol error curve for BPSK modulation scheme for varying Signal to Noise ratios or Eb/N0. The plot should show the simulated versus the theoretical ...
4
votes
1answer
3k views
Design of equalizer for wireless communication
I am having difficulty in trying to understand the working mechanism of an equalizer. Please correct me where wrong.
Mechanism of an Equalizer - The purpose of an equalizer is to reduce intersymbol ...
1
vote
1answer
187 views
Equalization knowing the Channel State Information
I am trying to simulate a simple communication system using channel estimation. I was able to estimate the channel response using the Least Squares channel estimator, and it is working properly (...
0
votes
1answer
244 views
Conceptual Question on equalization technique in rayleigh fading channel based on a paper
Question Link http://www.raymaps.com/index.php/theoretical-ber-of-m-qam-in-rayleigh-fading/
gives theoretical expressions for BER in Rayleigh fading channel. Can I use the expression for 64-QAM in ...
0
votes
1answer
73 views
Is the Channel shortening similar to Time domain Equalizer (TEQ)
I used to read about Time domain equalizer (TEQ) in many lectures, i.e here , But in many other papers, that's called Channel shortening i.e here .
However, in the a two above links, the cost ...
