21 Threads found on edaboard.com: Ber For Psk
How will u prove that ber for msb bit is less than ber for lsb bits in mqam....
Digital communication :: 09.09.2007 00:16 :: sohiltri :: Replies: 7 :: Views: 1057
hi can anybody sen me a program for psk modulation over frequencey selective channel........plzzzzzz
thank u vey much in advance
M=2; % size of signal constellation
k= log2(M); % bits per symbol
Digital Signal Processing :: 20.12.2007 15:39 :: miral_07 :: Replies: 0 :: Views: 660
I'm trying to calculate the theoretical ber for M-ary psk in the presence of a Rayleigh Channel.
I've been using
as a reference on how to do it but I haven't made much progress.
In this example he says the ber for Bpsk is the integral of 0.5erfc(sqrt(y))p(y) from 0 to infi
Digital communication :: 11.08.2009 22:53 :: dminhle :: Replies: 0 :: Views: 1807
I AM IMPLEMENTING THE PAPER
A SIMPLE TRANSMIT DIVERSTY TECHINIQUE for WIRELESS COMMUNICATION
BY SIAVISH M ALAMOUTI IN MATLAB.
THE PROBLEM IA FACING IS THAT I AM USING psk AND QAM MODULATION
THE CODE WORKS WELL WITH psk MODULATION BUT WHEN IT IS UP TO QAM IT DOESNT GIVE ME CORRECT ber for M>4 I AM USING (...)
Digital communication :: 24.02.2009 10:44 :: naheem84 :: Replies: 4 :: Views: 797
i'm new in this.
i have a noise generator module (frequency variation from 2kHz to 16 KHz )and psk module (bandwidth of 10KHz) . Now by using this i want to plot hte Eb/No Vs ber curve pls any one hlep me .
Digital Signal Processing :: 29.04.2011 05:26 :: thamotharak :: Replies: 1 :: Views: 963
for radio sistems narrow band (12,5 or 25 Khz)
-ASK. Simple and cheap (ususally AM systems)
-FFSK. Reliable and very good ber.
-psk has a higher speed but perhaps is more dificult adjustment if you are using links betwen your diferent stations.
I hope this helps a bit.
Electronic Elementary Questions :: 05.03.2006 17:31 :: Pont de Pedra :: Replies: 8 :: Views: 16085
what do you mean by "combine them together"
which matlab version do you have?
see this program for matlab 2008:
disp('M-Array psk Modulation')
%create a random digital message
M=input ('M= '); %alphabet size
x=randint(input('Number of binary bit stream = '),1,M);
nsample=40; %oversampling rate.
Digital communication :: 09.05.2009 18:22 :: Aya2002 :: Replies: 8 :: Views: 1670
I am trying to plot the ber of Bpsk, but it does not work correctly, I do not know why. I am using the following code:
Digital communication :: 13.01.2010 04:04 :: saeddawoud :: Replies: 0 :: Views: 648
i have question related on the ber and E0/N0 computation.
in fact, i worked on a Qpsk modulation with a ber of 4.10^-2 and E0/N0 of 6.07 dB.
Now, i want to take the interest on varying the modulation scheme (4QAM, 16 QAM, 256QAM).
what should i do to acquire values of ber and E0/N0 for each (...)
Digital communication :: 17.03.2010 15:18 :: imar :: Replies: 1 :: Views: 1756
you missing alot of concepts of doing the OFDM modualtion fft alone wont get you ofdm modualtion,
first you have to convert the data from D/A after ifft then up-convert it and transfer it to passband it(if necessary)
and to plot the ber u need to define AWGN for multipoints not only 1 point like u doing
hope this will help you
Digital communication :: 13.05.2010 00:32 :: moneer :: Replies: 4 :: Views: 1036
psk ber calculation
Eb/No = 5 db for this how to calculate the ber .
Digital communication :: 29.04.2011 05:50 :: thamotharak :: Replies: 4 :: Views: 2154
MSK is the general term for having several levels of whatever is being modulated, amplitude, frequency, or phase.
Mpsk is the more specific term for several phase states that can be gone to. They are generally a power of two 2, 4, and 8 being the most common. After 8 the states get so close together that the SNR required (...)
Digital Signal Processing :: 20.02.2006 00:47 :: flatulent :: Replies: 1 :: Views: 1045
Mod/Demod schemes can also be decided based on the following criterions as there should be a balance in the whole channel design. Considering a practical channel (6Mhz BW and ~15db noise), if u use QAM and a complex FEC algorithm ur channel will bang up against the Shannon's limit theorem, but if ur using psk ur ber will comparatively increase but
Digital communication :: 07.04.2006 21:11 :: ars0242 :: Replies: 4 :: Views: 2250
Use Matlab for the project
The project is about GSM. While the standard modulation in GSM is GMSK, an 8-psk modulation scheme was introduced later. The project is based on 8-psk.
The questions below are essentially guidelines for your project, requiring you to make several choices for the parameters (...)
Digital communication :: 22.04.2006 20:44 :: nick_533 :: Replies: 8 :: Views: 3237
Different Modulations have different ber in fixed SNR and different bit rate
Digital communication :: 25.10.2006 17:12 :: m_llaa :: Replies: 5 :: Views: 751
8 psk is a M-ary psk modulation in which bits are taken three by three
how do I implement this modulation in MATLAB?
There was already an opened topic about this:
I don't know if there is more.. you can do a search of the forum.
But for solving your probl
Digital communication :: 05.09.2007 14:55 :: mar_deepmode :: Replies: 2 :: Views: 2966
I am working on a project which is about MIMO quantized channel simulation. It expected to get result that existing a strategy to encode the observations at a fixed rate Q bits per observation and get a linear growth of the mutual information for the result M by M quantized MIMO channel. for this MIMO channel, I should prove that the (...)
Digital communication :: 08.10.2007 05:12 :: monicatu :: Replies: 0 :: Views: 708
I think you are confusing different issues.
Base Band is the data/information to send, it is not conditioned for wireless
As far as what Freq is best for long distance:
1) On earth communications it would be low freq's. Low Freq travel farther and
can bounce off the atmosphere. But low freqs can only send low data (...)
Digital communication :: 11.02.2008 14:58 :: Element_115 :: Replies: 27 :: Views: 5246
Hello folks, just discovered this valuable forum through google.
I searched the forum regarding Rayleigh channel modeling and all I found was matlab m files, so I'm chancing it and hope you might be able to help.
I'm currently designing a simulink model for adaptive digital audio transmission, in an AWGN channel it works fine, but I (...)
Digital communication :: 25.08.2009 14:26 :: gibbo :: Replies: 0 :: Views: 1277
I think your question is about using larger number of constellation points in modulation. As mentioned by deepuj, higher order constellations require more snr for maintaining the same bit error rate as that obtained in binary signalling schemes. You could have binary signalling in psk also, where the symbols are anti-podal ie, the (...)
Electronic Elementary Questions :: 14.07.2010 05:25 :: mpanilkumar :: Replies: 4 :: Views: 1214
helllllooo every body
I have simulted the 8 psk under raylegih flat fading channel
as illustrated in attachment and I compared it with theortical formula of 8psk using ber fading
but I have problem there is mismatach between two result as shown in
Digital communication :: 14.01.2011 11:01 :: mtelastal :: Replies: 4 :: Views: 652