58 Threads found on edaboard.com: Channel Model Matlab Code
i just need the matlab code for the estimation of channel in matlab code.
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i am doing my project on capacity analysis of under water acoustic mimo communications in that i have to do a channel (...)
Digital communication :: 26.03.2011 15:56 :: hem111 :: Replies: 0 :: Views: 1658
I seems to remember that Mathworks has simulink model of the communication system with the multipath fading channel. (not 100% sure)
As far as I remember it was in one of the webinar presented by mathworks engineer. (for some of the webinars you can download the code so if you are lucky and if I am not mistaken you can (...)
Digital Signal Processing :: 16.08.2004 12:26 :: dora :: Replies: 3 :: Views: 2672
i think adding DC value to the sum changes the rician numbers to rayleigh.
if you remember the existence of line of sight(LOS) signal in mobile propagation which makes the channel model to be rayleigh instead of rician.
Digital Signal Processing :: 13.04.2005 06:24 :: ee_expert2000 :: Replies: 3 :: Views: 3398
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.
noise=1/sqrt(2)*(randn(N,1)+sqrt(-1)*randn(N,1)); is the AWGN.
Digital communication :: 28.02.2007 10:19 :: leony :: Replies: 3 :: Views: 3321
Can anybody write me how can we recover original transmited signal over a rayleight fading channel in matlab?
I post the code I'm using to test it.
I define the Rayleigh channel but now I don't know how to implement the filter to achieve the transmited data. :|
Can please someone help me with the (...)
Digital communication :: 25.06.2007 07:51 :: mar_deepmode :: Replies: 1 :: Views: 2877
i need the code foe mimo ofdm
deepshika if u are having it plz send at email@example.com
channel modeling material den plz send
and i nned to plot ber curve for qpsk modulation using mimo ofdm
Digital communication :: 01.04.2012 08:29 :: priyana :: Replies: 26 :: Views: 18969
can any one expalin what is channel impulse responce is
how to write matlab code for it.
Digital communication :: 28.01.2010 15:14 :: abubakar402 :: Replies: 1 :: Views: 2320
thank you for your reply
actually I got one to one relay to work..
i was wondering how to extend that to multiple relaying ?
do I need to define n number of channels for that ?
Digital communication :: 18.02.2010 00:18 :: barnab :: Replies: 7 :: Views: 2243
Please i need a source code (C+= or matlab) for modelling 2 ray equal power channel model with delay spread of 5 and 20 microseconds between adjacent paths.
I should appreciate your help please.
Digital communication :: 26.04.2010 08:32 :: ibto75 :: Replies: 0 :: Views: 856
I need to make a matlab code for indoor channel model (Office) based on FSK modulation scheme and calculate the BER value.Actually I am new to this thing and do not have any idea from where to start.
So if anyone have matlab code for indoor channel (...)
Digital Signal Processing :: 05.06.2012 03:18 :: wakyousafzai94 :: Replies: 0 :: Views: 354
I use the following formula to generate noise in AWGN BPSK and QPSK , but it failed in QAM16,QAM256
Any suggestion , why it failed?
Es = Rc * log2M*Eb
σ2 = No/2
Rc : Coding rate =1
M : constellation points
Es: energy per symbol
Eb: energy per bit
σ : Standard deviation
No : noise spectral;
Eb/No (BPSK) = 1/2σ2
Digital communication :: 13.01.2013 17:10 :: ReComm :: Replies: 3 :: Views: 366
i need a matlab code for data transmission through jakes' simulator. do anyone have jakes' channel matlab code.
Digital communication :: 18.01.2013 03:44 :: vygaa :: Replies: 0 :: Views: 169
I?m need it too。can u analyze code as following：
The module generates noise,using downlink m-sequences.
The x sequence is constructed using the primitive polynomial
PC Programming and Interfacing :: 05.10.2005 09:59 :: yakinlu :: Replies: 1 :: Views: 1615
I'm looking for MMSE equalizer matlab code for AWGN channel model , single user mode.
Thank you in advance,
Digital Signal Processing :: 01.11.2005 14:21 :: Thommer :: Replies: 6 :: Views: 16381
i want matlab file or good paper in the following area:
"multipath rayleigh fading channel modelling"
Digital communication :: 18.02.2006 04:23 :: mnosrati :: Replies: 3 :: Views: 3548
Need to simulate a wireless channel with an M-ary QAM scheme for frames/audio or both. The suggested architechute is as follows
Data - Modulation - FEC coding - filter - istropic antenna - channel+Noise - antenna - filter - FEC decoding - Demodulation - Dataout.
M>32 for QAM
BW ~ 6Mhz
If anybody has already simulated such a channel (...)
Digital communication :: 31.03.2006 22:53 :: ars0242 :: Replies: 3 :: Views: 1340
To generate a Rayleigh fading channel model, you first generate real and image part of the independent Gaussian process, then you need design a filter to have the spretrum similar to Jakes model, i.e, to have the Bessel function as the auto-correlation. Passing through the I, Q Gaussian process to this filter, you oculd get the Rayleigh (...)
Digital communication :: 05.02.2007 18:38 :: spweda :: Replies: 15 :: Views: 44989
Do you mean to say that you want to use a equalizer with N taps while the channel is M taps?
N > M == This is the Ideal case. You have more taps than channel.
N < M == This happens practically. If the main tap happens to be about of this range then you have a problem.
I hope this helps. I could not clearly get your problem.
Digital communication :: 24.12.2006 08:53 :: brmadhukar :: Replies: 1 :: Views: 1723
matlab nakagami Fading channel Simulation? help me......:cry:
Digital communication :: 31.01.2007 01:11 :: gr8_halem :: Replies: 3 :: Views: 6552
can anyone send me matlab code for rake receiver model... for channel tracking using particle filtering in unresolvable multipath environments
Digital communication :: 05.10.2007 12:07 :: gani :: Replies: 0 :: Views: 553
I want to transmit a signal over a poison channel. Can anyone tell me how to model a poisson channel? I would also be grateful if you can give me the matlab code.
Thank you in advance,
Digital communication :: 03.09.2008 12:45 :: somedude :: Replies: 0 :: Views: 411
i am new in communication field.... i am given a task to write a code in matlab. i have to write a code for first to modulate a sorce n then pass it through channel,
i have to do it for 4 constellation points i.e
but i have no idea how to do dis....
Digital communication :: 12.05.2009 01:51 :: juliana :: Replies: 5 :: Views: 624
I have simulated WiMAX Transmitter and receiver in matlab. Now I want to introduce channel effect between tx and Rx. Pls guide me to model the channel in matlab.
How can I add Fading effect and Delay Spread in channel using matlab.
How will I estimate (...)
Digital communication :: 31.08.2009 02:39 :: er.rakeshjain :: Replies: 5 :: Views: 1374
can you send me matlab code to find impulse response and tapped delay model. with example. Please friends help to me.. i need urgently.
Digital communication :: 29.10.2009 18:55 :: bodepudichowdary :: Replies: 2 :: Views: 597
i have to generate BER uncoded BPSK in rayleigh fading channel by using Jakes model in matlab
anyone have matlab code for Jakes model??
Digital communication :: 27.11.2009 10:29 :: abcklm :: Replies: 2 :: Views: 2803
this is a simple code for M - PSK modulation
try it, if you need other help, contact me or you can join our groups:
and the second
%adding a rectangular pulse shaping;
clear all;close all;
disp('M-Array PSK Modulation')
Digital communication :: 10.05.2010 15:24 :: Aya2002 :: Replies: 4 :: Views: 2291
please check this post
Rayleigh Fading using young's model :
Intro on Rayleigh Fading
Digital communication :: 20.04.2010 22:06 :: mathuranathan :: Replies: 4 :: Views: 3932
Sorry but have you found any matlab code regarding fast fading Rayleigh channel?
Now I'm trying to simulate BER performance of BPSK with time-variant Rayleigh channel with different Doppler freqs!
I want to simulate BER performance using Clarke fading channel model with several Doppler (...)
Digital communication :: 30.06.2011 01:27 :: Sangjo Yoo :: Replies: 1 :: Views: 581
hi,Eb/N0 VS BER...modulation s BPSK... And channel assumption s rayleigh fading...after that have to work for Multiple feedback SIC.....
Digital communication :: 20.09.2011 11:50 :: sangeethamurugesan :: Replies: 5 :: Views: 822
I want to simulate a new modulation scheme named DCSK for Differential Chaos Shift Keying.
this modulation does not use sinusoidal signals as base signals, but uses chaotic signals (a noise-like signal).
for each symbol to be sent, we have a signal consisted of N real samples. I want to pass this signals through a fading channel and I wan
Digital communication :: 02.05.2013 08:19 :: ehbas :: Replies: 1 :: Views: 459
Systemview have large channel model lib + related comm sig generators. Can see time/spectrum/BER displays easy.
ASIC Design Methodologies and Tools (Digital) :: 17.03.2003 12:58 :: Bogyman :: Replies: 6 :: Views: 1331
OK! want the model for AWGN, and fading channel,
matlab, simulink provides complete simulation model for rayleigh fading channel and for AWGN. After finishing your simulation with simulink you can make a exe file from your structure. Also you can tell matlab to give you it's C source (...)
Digital Signal Processing :: 22.01.2004 03:53 :: mami_hacky :: Replies: 4 :: Views: 1625
oh !!!! :!:
thats a problem ... hea !! where is the mdl file u didnt upload dude?
any ways try experimenting with a diffrent puncture pattern or a diffrent data pattern and reduce the channel noise ...!!!
hope it helped u
Digital Signal Processing :: 20.08.2005 06:08 :: helios :: Replies: 14 :: Views: 10285
I have implemented in matlab some classical channel equalization methods
(I used AWGN,BPSK). I have to make BER vs SNR simulations and should do this
in different channel environments (rural, hilly, urban..etc).
I'm looking for the corresponding impulse response values for them, but so far I
didn't find any. Please help me, (...)
Digital communication :: 24.11.2005 13:48 :: Thommer :: Replies: 5 :: Views: 1369
The main challeng in MIMO is that you can use it as Multiplixing ( which mean transmitting different data information on each antenna which mean higher throghput) and Diversity ( which mean transmitting the same data information on each antenna which can improve the channel condition)........you must be careful when using MIMO system because the ch
Digital communication :: 26.11.2006 03:46 :: Abo Saker :: Replies: 7 :: Views: 1941
You can use communications blockset in matlab. There is Rayleigh Fading channel block in blockset and you can simulate implementing a simple simulink model.
Digital communication :: 31.01.2007 10:47 :: gaffar :: Replies: 11 :: Views: 13078
Im a a new user of matlab and used this Dent model as my reference. I try a lot of code and command to fix the error and missing code but it seems getting worst. If there is anyone who are really helping and advance in matlab and willing to help me. I wish you guys always happy and god bless you.
p/s the (...)
Digital communication :: 23.06.2007 08:34 :: goldwing :: Replies: 1 :: Views: 600
I have a project about simulation channel in communication using matlab and I calculate the BER, it was BER=1, I would ask if this value good or bad in the channel.
Digital communication :: 07.07.2007 13:54 :: khaldoon99 :: Replies: 7 :: Views: 939
This is matlab program
"h_block" gives a complex matrix of order 512 by 1
"h" just reshape it into a matrix of order 1 by 512
I want to ask is this is the correct way to define rayleigh channel
by the pathloss is defined to be 1,one.
Digital communication :: 02.01.2008 14:23 :: urwelcome :: Replies: 4 :: Views: 1621
in the matlab code you have channel model in m file try some model than see the result
Digital communication :: 04.04.2008 09:24 :: aladin2007 :: Replies: 1 :: Views: 1315
Please can any one send me the matlab code for simulate the Multicode Multicarrier CDMA (MTC-MC CDMA//MC-MC CDMA) using Walsh-Hadamard code, Gold code & Kasami code in Rayleigh fading channel + AWGN with BPSK?? Thanks!
Digital communication :: 07.02.2009 18:20 :: gerardbeta :: Replies: 1 :: Views: 1649
simple question >>>
when we model Rayleigh channel
we use in matlab this command
h = 1/sqrt(2)*; % Rayleigh channel
also we can use the distribution of Rayleigh channel which is very known
so what is relation between two commands ?
Digital communication :: 22.05.2009 04:52 :: matlab1983 :: Replies: 2 :: Views: 563
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 (...)
Digital communication :: 25.08.2009 14:26 :: gibbo :: Replies: 0 :: Views: 1160
here is i have a matlab code as follow :
N = 10^6; % number of bits or symbols
Eb_N0_dB = ; % multiple Eb/N0 values
K = 4;
for ii = 1:length(Eb_N0_dB)
ip = rand(1,N)>0.5; % generating 0,1 with equal proba
Digital communication :: 24.05.2010 10:02 :: fananideta :: Replies: 5 :: Views: 2268
I am currently working on the task of writing matlab code for simulation of wireless lan. I want to add fading in the channel. I use rayleighchan function in matlab. But i dont understand its properties (doppler frecuency, path gain, etc). Which properties that need to be set? Can anyone help me?
Sorry for bad (...)
Digital communication :: 25.05.2010 05:44 :: garapan :: Replies: 3 :: Views: 1019
I'm already aware of the in-built matlab functions for generating random numbers and noise (randn, rand, awgn etc.) It may be an easy solution but I guess I'm unable to see it clearly, so I thought I'd ask for some help here
My task is to create a software model of an LDPC Decoder, Encoder and the sort. While (...)
Digital communication :: 04.02.2012 17:34 :: rayyanc :: Replies: 0 :: Views: 1577
you can start to make ur own block diagram
e.g:input-->channel coding-->modulation--STBC ENcodeR-->OFDM MODULATOR-->guard interval-->fading etc
and you can make it easily
Digital communication :: 01.05.2012 21:34 :: cokibolong :: Replies: 3 :: Views: 471
Rician Fading model is available here
Rayleigh Fading model is available here
Digital communication :: 30.09.2012 20:32 :: humourmind :: Replies: 1 :: Views: 724
Help me, please......
I tried to make a simulation how a system with no diversity goes trough Rayleigh channel. I used QPSK modulation. But the performance graphic looked so bad (I mean, it was not like a "waterfall". It had no pattern at all). The fading model ran well on system with MRC. But not with single input single output.
Does anyone know
Digital communication :: 01.10.2012 04:35 :: StupidStudent :: Replies: 0 :: Views: 241
if you want 6 bit/symbol you need a 64-QAM modulation not 16-QAM.
Nsymbols = 1000;
h = modem.qammod('M',M,'InputType','bit','SymbolOrder','gray');
bits = bits = round(rand(log2(M)*Nsymbols ,1));
x = modulate(h,bits);
for the Rayleigh channel your model would be
y = h*x + w;
where h and w are complex
Digital communication :: 06.02.2013 02:38 :: wave1 :: Replies: 2 :: Views: 331