Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Hello,
My dissertation topic is about space time decision feedback equlization. But I do not know where to start. Can anyone share resources about dfe of any kind? If you got a matlab code or pdf documents about simulation procedures, it would be very helpful.
Thanks a lot.
Re: web design project
You definitely need strong knowledge in PHP and mysql. Building an e-commerce web site from scratch requires lots of work to do especially in security. If you dont have time concern, there are documents available (just google them), otherwise I suggest go for OS commerce...
Thanks for the quick reply. But I am using the same structure for 4-QAM without equalizer and BER is the same as the theoretical values. I tested this again with BPSK and it is ok as well. But when simulating 16-QAM, BER is always 0.5. What would be the reason of this?
qam to bit mapping in matlab
I am trying to simulate a 16 QAM modulation in rayleigh channel. However the BER is always around 0.5 no matter the Eb/No is.
The channel model I am using is:
ch=1/sqrt(2)*(randn(N,1)+sqrt(-1)*randn(N,1)); where N is the number of bits...
wcdma bandwidth
Hello,
I've been designing a single stage receiver and my IF frequency is 350 Mhz. The IF filter I am using has a group delay of 1 µsec and the group delay variation is 85 nsec. Can you tell me is it a good performance or not? What is the criteria for selecting an IF filter (for...
transceiver block diagram
Hello,
I dont know here is the place, but I have designed a tranceiver using ADS. For writing a report, I want to plot a complete block diagram.
i.e sth like this (of course not this complex)
**broken link removed**
How can I use ADS or any other program to do...
Thank you for the replies. What I am concerned mostly about the PA, is in my transmitter design, I want to calculate the ACPR values effectively,
However in RF Design Guide, the transmitters use only normal amplifier model so I cannot be sure that simulation results are correct. Basically I...
ads transmitter
Hello,
I need to simulate a single stage qam (upconverter) transmitter using ADS. I followed the examples (RF Design Guide) and replaced the blocks, but I am confused about how to implement the PA amplifier at the last stage? Because I could not find the s2p parameters, for...
I was trying to implement a MMSE equalizer in Matlab, and come across the following code on the web. The problem is, whenever I searched, I found out that they use tap size the same as the size of discrete channel model. But I have, lets say a channel of
h=[1 0 0 0 0 ........ 0,5 ....0 0 0...
Hello everyone,
I am confused about a thing. If I wanna add white noise with a variance of 0.0625, are the following are correct?
noise_sig = original_sig + 0.0625*randn(size(original_sig))
I am stuck whether I need to use 0.0625 or sqrt of it.
Besides, is it OK to write the following...
zero forcing filter matlab
Hello,
I am new at equalizing and have a small question.
If I have a unequalized signal as 'h'
and let's say we have an equalizer with the transfer function:
y[k]=x[k]-0.5x[k-1]+3x[k-2]- 4x[k-3]+5x[k-4]- 6x[k-5] (just made up the values)
Since we know the weights...
Hello,
If I have a channel impulse response like δ(t) + 2*δ(t-Ts), how can I model this in Matlab?
I realized it should be like h=[1 0 0] or sth like that. But I do not know what the matrix elements mean. Can anyone help me?
Thanks...
matlab psd function
Hello,
I am tryin to simulate a QAM modulation and demodulation. When I use the PSD function, because there are complex values, I get two sided graph, but I am confused what it represents. The part of the code here:
.......
%fc=0.25 normalized
%fs=2...
Hello,
I've been working on a project for BER values of 16 QAM modulation. I need to know what is the typical BERs for this modulation? I think usually 10e-5 is a good value. Any chance to get the lower rates? If not why?
Thank you...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
