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## Frequency Domain Equalization |

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simulink frequency domain , frequency domain equalizer , frequency domain solver , frequency domain detector

simulink frequency domain , frequency domain equalizer , frequency domain solver , frequency domain detector

1000 Threads found on edaboard.com: **Frequency Domain Equalization**

Digital Signal Processing :: 03-11-2006 10:34 :: udit :: Replies: **1** :: Views: **1228**

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

Digital communication :: 02-09-2014 15:10 :: David83 :: Replies: **5** :: Views: **632**

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

Digital communication :: 10-09-2011 16:22 :: David83 :: Replies: **0** :: Views: **495**

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

Digital communication :: 01-08-2011 11:15 :: riad86 :: Replies: **0** :: Views: **489**

Time **domain** **equalization** is done by using "all pass networks." These are a quad of two left half plane poles and two right hand plane zeros. (You can also use a real LHP pole and RHP zero pair for frequencies near DC.) These produce a time delay near the pole **frequency** without any amplitude changes. You adjust the real and imaginary (...)

Other Design :: 12-16-2002 14:21 :: flatulent :: Replies: **1** :: Views: **1217**

Phase noise and AM noise measurement in the **frequency** **domain**

RF, Microwave, Antennas and Optics :: 04-14-2003 09:15 :: HO_220 :: Replies: **0** :: Views: **1511**

No. FDTD is time **domain** method, FDFD is **frequency** **domain** method and is meaningful different particurarly about computational solution.
Best regards

Electromagnetic Design and Simulation :: 04-14-2005 09:00 :: yuyu :: Replies: **4** :: Views: **2161**

What you said is correct; only you forgot one important thing. There is no such thing as delta impulses in real design. The best pulse you can get is a few ps width, depending in your technology. So your **frequency** **domain** representation for this IS limited.
Another thing: suppose you could make a delta impulse. Any transistor in the signal chain

RF, Microwave, Antennas and Optics :: 11-15-2004 13:39 :: radiohead :: Replies: **5** :: Views: **3511**

a time **domain** solvers:quit suitable for transient,but when **frequency** is high ,it will need a lot of time.
a **frequency** **domain** :more efficiency for nonlinear problem,usualy for steady problem.
So such as MWR,integrate the HB method,and pspice method.
In the EM FDTD just in time **domain**,they can get (...)

Electromagnetic Design and Simulation :: 11-20-2004 04:48 :: IICCEE :: Replies: **2** :: Views: **3855**

Suppose I have a **frequency** **domain** reflection coefficient measurement G(i), wher G(i) was measured at **frequency** f0+i*df. The **frequency** step is df, the starting **frequency** is f0, but f0 is not an integer multiple of df.
This means we have equidistant measurement points on the unity circle, but the points (...)

Digital Signal Processing :: 01-18-2005 04:03 :: radiohead :: Replies: **0** :: Views: **1225**

AM and FM signal's spectrum consists of 2 sided spectrum shifted up to the carrier **frequency**. The negative frequencies are a mathematical exactness, but are essential since otherwise it would be missing the lower sideband in the original spectrum.

RF, Microwave, Antennas and Optics :: 10-17-2005 05:56 :: vfone :: Replies: **1** :: Views: **706**

Can someone explain me more how to use the **frequency** **domain** solver??
I don't understand very well what means: 'solves the problem for every **frequency** separtely'.
Then there is something else: 'this FD use a special broadband **frequency** sweep technique in order to derive the full broadband spectrum from a relatively small (...)

Electromagnetic Design and Simulation :: 10-19-2005 12:18 :: hapciu :: Replies: **0** :: Views: **771**

hi!
in time **domain** it is possible to use probes to get the signal (e-field, h-field) into one point. how can i get the signal into one point in **frequency** **domain**?
thx to all!
maybe this time someone can realy give me an advice????????????

Electromagnetic Design and Simulation :: 11-03-2005 10:04 :: hapciu :: Replies: **2** :: Views: **630**

I trully believe that it is a question of notation, try to figure out if the both representantion regards to the **frequency** **domain** of the signal ( Its fourier representation) if so, dont worry about each author choose his way to present the subject.

Digital Signal Processing :: 01-22-2006 17:44 :: claudiocamera :: Replies: **4** :: Views: **652**

Your question is not clear. I'm guessing that you have a file of audio samples like a .wav file of PCM data.
If your data contains most of it's energy at one **frequency** eg sine or sqaure wave you can process the samples to remove any DC offset then count the number of samples between zero crossings.
If you have data such as a recording of voic

Digital Signal Processing :: 01-23-2006 23:19 :: throwaway18 :: Replies: **2** :: Views: **646**

I agree, that is a bit difficult to understand; however, I don't think you need this to prove the theorem.
Physically (in the extreme cases), this theorem is saying that time **domain** dc signals look like impulses in the **frequency** **domain** and time **domain** impulses look like constants in the **frequency** (...)

Digital Signal Processing :: 02-07-2006 21:38 :: v_c :: Replies: **3** :: Views: **1238**

hi,
Signals are converted from time or space **domain** to the **frequency** **domain** usually through the Fourier transform. The Fourier transform converts the signal information to a magnitude and phase component of each **frequency**. Often the Fourier transform is converted to the power spectrum, which is the magnitude of each (...)

Digital Signal Processing :: 03-23-2006 03:52 :: tamerakshar :: Replies: **2** :: Views: **2682**

Hi,
A good article on understanding DSP's **frequency** **domain**

Digital Signal Processing :: 03-23-2006 05:02 :: radheshbhat :: Replies: **0** :: Views: **749**

as we know, according IFFT, we can convert a signal from **frequency** **domain** to time **domain**, the problem is , if the result of IFFT is complex, then what's the time-**domain** signal, the real part of IFFT or something else? And what's the physical meanings of the imaginary part of a time-**domain** signal?
i am (...)

Mathematics and Physics :: 04-20-2006 04:39 :: amigo_pp :: Replies: **10** :: Views: **1619**

But remember that we never achieve the average perfectly. That will require a low pass filter having a cutoff **frequency** of 0 Hz. Thus low pass filtering always leaves the low **frequency** components. If these components are of small amplitude, then we get something near to the average.

Analog Circuit Design :: 06-15-2007 14:00 :: nvd :: Replies: **3** :: Views: **3159**

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

Digital communication :: 08-10-2006 17:35 :: MOHAZAD :: Replies: **0** :: Views: **605**

Hi all,
I can show that convoluntion in time **domain** is multiplation in frquency **domain**. However, Can anyone help me show that multiplation in time **domain** is convolution in **frequency** **domain**? like this : v(t)w(t) -> V(f)*W(f)
thanks in advance!

Digital Signal Processing :: 08-29-2006 00:39 :: lekhoi :: Replies: **2** :: Views: **603**

Digital communication :: 09-03-2006 07:18 :: ravurig :: Replies: **4** :: Views: **829**

Which signal appears same in **frequency** **domain** and time**domain**

Digital Signal Processing :: 09-27-2006 11:31 :: senkadir :: Replies: **1** :: Views: **738**

Here is a simulink model for BPSK modulator. The output seems fine. Now I want to see the BPSK spectrum. I'm not able to obtain the **frequency** **domain** view of BPSK signal. HOw do I do that?
Regards
M

Digital communication :: 11-16-2006 12:15 :: magnetra :: Replies: **10** :: Views: **3462**

Can any one refer some material on the **frequency** **domain** Equilizers (FDE) ????
Waiting......
BR

Digital communication :: 01-19-2007 22:59 :: bee :: Replies: **0** :: Views: **396**

sadid,
The fundamental of a half-wave rectified sine wave is equal to the input fundamental **frequency**. The fundamental of a full-wave rectified sine wave is equal to twice the input fundamental **frequency**.
.
For the fourie series of each see, for example:

Electronic Elementary Questions :: 01-22-2007 10:36 :: Kral :: Replies: **7** :: Views: **1725**

iam doing a project in digital image processing.i have to implement feature detection on an image in **frequency** **domain**(phase please send me a link to find a free e-book on above topic.
THANK YOU

Digital Signal Processing :: 01-26-2007 10:44 :: pmspraju :: Replies: **0** :: Views: **653**

Hi friends,
I am trying to display time **domain** signal in **frequency** **domain** using Matlab.I took **frequency** of signal as 100hz and sampling **frequency** as 1000sampels/sec
I have tried using 'fft' function but not getting.
Anyone of you give me the solution for displaying **frequency** (...)

Digital Signal Processing :: 02-24-2007 13:05 :: tarakapraveen :: Replies: **3** :: Views: **1968**

Hi i friends,
I have one doubt in OFDM.We are using IFFT for the purpose of baseband modulation.The function of the IFFT is to convert **frequency** **domain** to time**domain**.But how we are giving the input in **frequency** **domain**.
1)We are generating data
2)Applying modulation
3)Applying IFFT
Where the (...)

Digital communication :: 03-24-2007 23:41 :: tarakapraveen :: Replies: **2** :: Views: **1505**

any signal(e.g speech) can be synthesized using summation of sinosoids. fourier transform(used for continous and non-periodic data) gives the contribution of all sinosoids (each with different **frequency**) in the synthesis of a particular signal.

Digital Signal Processing :: 04-27-2007 01:03 :: plc :: Replies: **4** :: Views: **1778**

i want to know y we have to do fourier transform and know the frequencies. iam a novice in thiis field and i want to know y the signal have to be converted to **frequency** **domain**. pls any one help me. and y we use DFT kin of algorithms
with regards

Digital Signal Processing :: 04-25-2007 01:28 :: rajsrikanth :: Replies: **4** :: Views: **852**

I want to use an object in ADS to model Y parameter in the **frequency** **domain**.
for example Y(f1) = Y1, Y(f2) = Y2, Y(f3) = Y3, ...
can you help me?

RF, Microwave, Antennas and Optics :: 06-03-2007 11:49 :: hamidrezakarami :: Replies: **0** :: Views: **485**

Hello,
I'm a newbie ...
We are benchmarking EM software for applications mainly at 13.56MHz.
I think it's better to choose a **frequency** **domain** EM software for these low frequencies.
HFSS seems to be good for that but what do you think of the frequecy **domain** solver of CST?
Its interface is more friendly but what are its performance vs (...)

Electromagnetic Design and Simulation :: 09-25-2007 03:32 :: zorg :: Replies: **0** :: Views: **998**

New to DSP.
Need to convert a data set from acceleration to velocity.
Is the integration process best done in time **domain** or **frequency** **domain**? Haven't found a DSP text that addresses this question.

Digital Signal Processing :: 10-05-2007 07:45 :: jmarkwolf :: Replies: **14** :: Views: **9332**

How we can separate two signals that overlap in **frequency** **domain** ?
one signal is narrow (10 MHz bandwidth) and stronger and another signal is wide band (50 MHz) and weaker than.
which software methodes exist in this subject?

Digital communication :: 10-11-2007 09:02 :: manasiri :: Replies: **4** :: Views: **923**

Can anybody explain or help by sending relevant paper that how using walsh transform i am shifting from time **domain** to **frequency** **domain**.
Thnx,
Regards
swagata

Digital communication :: 12-18-2007 01:09 :: swagata :: Replies: **0** :: Views: **649**

I am working with rectangular waveguide to coax/microstrip transitions and some people have recomended me to run the **frequency** **domain** solver after having run the transient one. I would like to know how to manage with **frequency** solver menu and why it is important to run both solvers over the same structure.
Thank you in advance!
Clara

Electromagnetic Design and Simulation :: 12-18-2007 04:36 :: Clara_Rios :: Replies: **4** :: Views: **3264**

Hello everybody,
can anyone help me in understanding pass band signal and their representation in **frequency** **domain**.
waiting anxiously for help.........
Regards,
vini

Digital communication :: 02-20-2008 12:47 :: vini_rathi :: Replies: **3** :: Views: **909**

Hey there,
In CST i read that the **frequency** **domain** solver is better used with structure having dimensions less than the wavelength. So i had my sturcture and got good results using **frequency** **domain** solver. I tried to simulate the same structure with Transient solver but results were so bad... Does anyone know why is that? (...)

Electromagnetic Design and Simulation :: 04-21-2008 12:09 :: andrewmorcos :: Replies: **0** :: Views: **738**

hi
I am searching for a reference for
Finite difference **frequency** **domain** in non homogeneous mediacan anybody help me??

Electromagnetic Design and Simulation :: 05-12-2008 00:07 :: meisam haghparast :: Replies: **0** :: Views: **773**

Hello,
I have to write this function:
y=filter(w,1,x)
in the **frequency** **domain**. w and x are vectors but they haven't the same length. I have to make a convolution between w and x and I think I have to use the funcction freqz but it doesn't work...
Can you help me?
Thanks

Digital Signal Processing :: 06-01-2008 06:01 :: nature.boy :: Replies: **3** :: Views: **4448**

the inputting of the IFFT in OFDM should be the **frequency** **domain** point. which is the mapping of the constellation such as QAM or QPSK. but the vector in the consellation is just complex.why some book call this vector **frequency** **domain** point? such as 3-3j in conselation,it shoud be time **domain** signal,why is (...)

Digital communication :: 06-24-2008 11:26 :: richardhuang :: Replies: **4** :: Views: **1745**

Analog Circuit Design :: 10-16-2008 01:26 :: cinch :: Replies: **4** :: Views: **2312**

Hi All,
I am trying to simulate a SC-**frequency** **domain** LMS equalizer.
Now since it is SC the detection has to be in time **domain** although the
channel estimation is in **frequency** **domain** so i follow these steps
1) Multiply data -> data_f (in **frequency** **domain**) with weights (...)

Digital Signal Processing :: 01-09-2009 01:06 :: kel8157 :: Replies: **1** :: Views: **1248**

Hi,
I've been trying to understand more on **frequency** plots of images.
1. Assuming a 1d example of just a strip of an image; in the **frequency** map there are 'same' no. of frequencies as there are pixels. What is the reason for this? Does this have something to do with the Nyquist theorom.
2. What you see in the **frequency** (...)

Digital Signal Processing :: 01-29-2009 20:43 :: ndesk1900 :: Replies: **1** :: Views: **777**

I think, because if you know **frequency** response of the system, you can easily predict its response in time **domain** for any type of input signal. (And vice-versa as well). Another reason could be well known technique of determining system stability based on **frequency** response.

Digital Signal Processing :: 02-09-2009 10:30 :: nl5 :: Replies: **4** :: Views: **2496**

Hello Praful,
I experimented with your free-space dipole problem a little bit.
When I refined the mesh (transient solver) somewhat, the results (S1,1) of the two solvers got closer. I get about a 0.5 db difference with about 4 or 5% **frequency** shift.
I also get about this much **frequency** shift when I compare the two solvers using CST's dipol

Electromagnetic Design and Simulation :: 04-09-2009 17:39 :: jpsmith123 :: Replies: **5** :: Views: **3786**

Hi,
I am looking for the book;
**frequency**-**domain** Characterization of Power Distribution Network
Author; Istvan Novak & Jason R. Miller
ISBN:13:978-1-59693-200-5
Can anyone help?

Electromagnetic Design and Simulation :: 04-26-2009 21:41 :: magneto_cool :: Replies: **0** :: Views: **1004**

whan I simulat an array structure by CST the results confuse me because the reflection phase diagram using time **domain** solver (!T) and **frequency** **domain** solver (!F) is quite different. (Why?)
I know the results of (!T) is TEM and the results of (!F) is TE and TM is any way exist to find reflection phase by (!F) for TEM?

Electromagnetic Design and Simulation :: 05-10-2009 05:26 :: mirshahram :: Replies: **0** :: Views: **1439**

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