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# Frequency Domain Equalization

20 Threads found on edaboard.com: Frequency Domain Equalization

## doppler shift correction for OFDM

Hi all, suppose I have an OFDM signal coming from a source moving towards me at high speed. The symbols will be compressed in the time-domain resulting in an upwards shift in the center frequency, and a broadening of the signal bandwidth. The question is, can I correct this by simply using a higher frequency reference crystal on the (...)

## OFDM with pilot and equalizer

equalization in OFDM with perfect subcarrier orthogonality is to done by multiply the received OFDM symbol by the inverse of a diagonal matrix that result from taking the FFT of the circular channel matrix. It's a one tap frequency domain equalizer. My guess is that your code performs it, but you don't realize it.

## MMSE based Equalization in OFDM systems

Hi, What is the performance difference of MMSE equalizer and ZF equalizer in a OFDM system. I have simulation 3 tap Rayleigh channel for QPSK ODFM system and found out that both the equalizers give the same performance. But in Single carrier frequency domain equalization, MMSE performs significantly better than ZF. I modeled (...)

## SC-FDE and OFDM STBC

Hello all, Why when we use space-time block coding (STBC) with single-carrier frequency-domain equalization (SC-FDE) we use a permutation matrix, while we don't use it in case of orthogonal frequency division multiplexing (OFDM)? Thanks

## SC-FDE continuous time transmission in MATLAB

Hello all, I would like to implement single carrier-frequency domain equalization (SC-FDE) in continuous time in MATLAB. In particular, I have the following: 1- The channel is given by: h(\tau)=\sum_{q=1}^Qh_q\delta(\tau-\tau_q) 2- The transmitted signal is given by: s(t)=\Re\left\{e^{j2 f_c t\pi}\sum_{k=0}^{K-1}s

## [MATLAB]single carrier frequency domain equalization in continuous time

Hello all, Can anyone help me implementing single carrier frequency domain equalization (SC-FDE) in continuous time in MATLAB, please? I have the math, but I don't know how to do it in MATLAB!! Thanks

## Novality Thing in Research Discussion

Hello all, Can I ask you guys how to come up with something novel? Suppose you are working on a certain framework like frequency selective channels and single carrier frequency domain equalization (SC-FDE), then what? Thanks

## SC-FDE MATLAB Code needed, please

Hello, does anyone has a MATLAB code for single-carrier frequency-domain equalization (SC-FDE) for the simple linear case? Thanks in advance

## Frequency Domain Equalization

Hi, I am reading a paper on equalization on frequency domain, and the author says that to convert the MMSE in the time domain we need first to expand the transmitted sequence and the equalizer coefficients from say M samples to some N>=2M-1 samples by padding zeros. Why is that? Thanks

## channel equalization/correct the effects of multipath in OFDM

The simplest equalizer is a frequency domain, pilot assisted equalizer. Here you have many known subcarriers in the frequency domain called "pilots", these pilots are received after being affected by the channel transfer function, so we deduce the transfer function at these pilots' locations and interpolate them to obtain (...)

## time domain equalization

HI guys, can someone give me brief explanation about time domain equalization and how different it is from frequency domain equalization, also I would appreciate if you guys could help me with some matlab codes to start working on this area thnk u in advance

## Equalization confusion on OFDM

Hi guys, I am working on optical ofdm, its not much of a different from normal ofdm. I have a problem at the receiver side where my constellation shifts in phase. So I did a very simple equalization, where the data before IFFT which will be in so call frequency domain, assume that as X. Then the data at receiver after FFT which wi

## Video Lectures (See this)

I want good quality video lectures on equalization like LMS, RLS, frequency domain equalization. Ideally the lectures should be with a digital pen as it is clearer than a person writing on the board. But please send me the links at communications (under-score) engineer (at) Yahoo (dot) com

## Video lectures on DSP (Please See)

I want good quality video lectures on equalization like LMS, RLS, frequency domain equalization. Ideally the lectures should be with a digital pen as it is clearer than a person writing on the board. But please send me the links at communications (under-score) engineer (at) Yahoo (dot) com

Hi, Do you want to use it for signal detection/equalization in fading channel? If yes for what kind of channel (I mean frequency selective/time varying or what?) state space equations depend on kind of application you want. so for different scenarios state space equation differ? regards

## Question:what is Equalization?

frequency domain equalizers are much simpler that time domain equalizers. In OFDM we implement equalizer after FFT,so here frequency domain equalizer is a simple Equalizer = FFT out/(CHannel Estimate) .

## plz help(iterative equalization simulation)

Hi please help me to simulate a frequency domain turbo(iterative) equalization. its diagram has attached. my essential problem is MAP decoder and the relationship between SNR and BER. you can download its paper for better intuition and equations from this site if any one help me I will

## NEED HELP(turbo equalization simulation)

Hi can any one help me to simulate a iterative(turbo) frequency domain equalization? its diagram and paper has attached. my essential problem is MAP decoder and the relationship between SNR andBER. Thanks. Excuseme the site for download the paper is

## Training sequence for channel estimation

I am simulating an adaptive channel estimator for MIMO single carrier frequency domain equalization with space time block coding. I need to design the Training sequence. I am using QPSK modulation. I have read that Frank Zadoff sequence are optimal for training sequence. could anybody tell me how to generate Frank Zadoff unique word sequence (...)

## frequency domain equalization

frequency domain equalization is said to be less computationally complex as compared to time domain equalization why? where can I find the analysis? could you send mail me the paper

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