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18 Threads found on edaboard.com: Frequency Domain Equalization
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 (...)
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
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
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
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
Hello, does anyone has a MATLAB code for single-carrier frequency-domain equalization (SC-FDE) for the simple linear case? Thanks in advance
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
Hi kalyanasv , Thank you for your reply, concerning passing the data through teh channel, i have used 4QAM to modulate the data, and i know after this step comes pilot insertion-IFFT -CP then transmission through channel afterwards the reverse process (remove CP-FFT- remove pilots ), only i have read somewhere, i dunnot remember where tough taht,
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
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
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
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
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) .
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
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
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 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