1000 Threads found on edaboard.com: Path Loss Fading Matlab
I am trying to simulate SISO communication with path loss. Following are the parameters involved.
n=3.5; (path loss exponent)
GtGr = 5dBi (transmit antenna gain times receive antenna gain)
fc = 2.5Ghz; (carrier freq)
d = 50m (distance between transmitter and receiver)
As we all know the basic equation for SISO (...)
Digital communication :: 12-22-2008 10:34 :: bee :: Replies: 13 :: Views: 4893
I need matlab file for calculate path loss model using modified Hata model.
Digital communication :: 07-24-2006 18:17 :: islamatef :: Replies: 0 :: Views: 915
i want to know how to generate in matlab the complex channel coefficients for a rayleigh fading channel that change with distance between Tx and Rx
with certain path loss exponent
Digital communication :: 12-30-2012 18:52 :: eng_basem :: Replies: 0 :: Views: 325
I am working on propagation path loss. can u tell me how can i add path loss to transmitted bits. i got the path loss of 110 dB and now i have to corrupt the transmitted data with that amount . Can u plz help me out.
Digital communication :: 08-18-2009 02:25 :: sohkha :: Replies: 2 :: Views: 753
U can use Friis transmission equation to find the received power.This eqn gives received power in terms of transmitter power, gains of transmitting and receiving antennas , frequency of operation and path loss (which ofcourse includes distance)
Digital communication :: 11-16-2010 03:30 :: Bhanumurthy :: Replies: 3 :: Views: 949
im trying to model a rayleigh fading channel with AWGN for a hybrid relay forwarding scheme.
i have generated the channel coefficients then it hit me that I didn't include any measure for the path loss as the signal propagates.
i am using matlab and generated the coefficients (h) and noise (n) using pre-built (...)
Digital communication :: 03-03-2011 00:12 :: mish111990 :: Replies: 6 :: Views: 3352
can anyone tell me how to model channel between base station and mobile. In one of the eqn channel is given by,
h = sqrt (path loss*shadow fading)*gain*small scale fading
also i have found another eqn
h = small scale fading / sqrt (path loss*shadow (...)
Digital communication :: 03-10-2011 12:40 :: rit :: Replies: 0 :: Views: 1094
Is it needed to convert a set of path loss values in dB to linear units like watts before they are correlated to each others in matlab.
For example the following gives different results:
yy=corr2((10.^(x./10)),(10.^(y./10))) % From dB to linear and then correlated
Education :: 05-10-2014 02:33 :: Imtiaz639 :: Replies: 0 :: Views: 347
Here is a program that will calculate path loss given system parameters such as antenna size, frequency, coordiantes of end points or distance between them.
Software Links :: 01-17-2003 22:33 :: flatulent :: Replies: 0 :: Views: 2330
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 download the
Digital Signal Processing :: 08-16-2004 12:26 :: dora :: Replies: 3 :: Views: 2873
Free space path loss formula:
Ploss = 20*log((4*Pi*d)/Lambda)
d = distance in meters
Lambda = wavelength in meters
Pi = 3.14
RF, Microwave, Antennas and Optics :: 06-11-2005 09:35 :: vfone :: Replies: 3 :: Views: 822
how to measure the path loss of a cable using a spectrum analyzer and a signal generator
thanks in advance
RF, Microwave, Antennas and Optics :: 02-15-2006 01:42 :: flipflop08 :: Replies: 8 :: Views: 7643
try this pdf's
RF, Microwave, Antennas and Optics :: 05-20-2006 18:43 :: plasma :: Replies: 6 :: Views: 6257
How do I calculate free space path loss of a cell site
Free space loss formula is given by: loss(db) = 32.4 +20 log(d)+20log(f)
d is the distance between transmitter and receiver given in Km
f is the frequency given in MHz
This is just the free space loss if you are interested in the (...)
Electronic Elementary Questions :: 09-08-2007 10:48 :: claudiocamera :: Replies: 4 :: Views: 2873
have a look the freeware program "Radioworks" which has several path loss models already programmed into it. Might be a useful aid.
Software Requests :: 03-06-2008 18:40 :: Roger Freeman :: Replies: 4 :: Views: 262
Are the path loss models are experimental? Or is there a theoretical derivation for them?
Digital communication :: 09-30-2008 23:57 :: Sadegh.j :: Replies: 5 :: Views: 1176
how to measure or calculate cell radius using path loss?
Digital communication :: 04-06-2009 10:37 :: purno :: Replies: 0 :: Views: 918
free space path loss is what you get when your transmit and receive antennas are ontop of 300 foot towers with nothing in between but air, and assume no multipath. It is easy to calculate.
Actual path loss, with trees and buildings and reflections, is a much higher number. Unfortunately it is the actual (...)
RF, Microwave, Antennas and Optics :: 04-30-2009 06:18 :: biff44 :: Replies: 9 :: Views: 2046
I am working on the simlation of RFID system ,the problem that i am encountering is that my transmitted baseband signal is real and when i give it as input to the free space path loss block in simulink it gives me an error indicating that only complex signal must be given as an input to free space path loss ,i (...)
RF, Microwave, Antennas and Optics :: 10-07-2009 06:53 :: shamma :: Replies: 1 :: Views: 1036
Normaly its is assumed in the papers that path loss factor is known at the receiver and instantaneous channel is not. Can some one plz explain me the physical senario that why do we need to know the path loss at receiver
Digital communication :: 10-29-2009 14:50 :: bee :: Replies: 0 :: Views: 649
I'm looking for calculating which a method to find path loss .if there are some equation are helped to solve it , please insert them .
Network :: 12-10-2009 09:09 :: ohosam :: Replies: 0 :: Views: 921
Friis equation for free space path loss doesn't have anything with antenna gain (you are confusing with link budget)
Free Space path loss(dB) = 27.6 – 20*LOG – 20*LOG
RF, Microwave, Antennas and Optics :: 01-07-2010 14:59 :: vfone :: Replies: 15 :: Views: 10334
I need to know if i can use COST 231 model to estimate the path loss for a wireless sensor actor network deployed in an urban area. The sensors and actors both are static but the actors has mobility potentials?
Network :: 05-22-2011 15:09 :: comp04 :: Replies: 0 :: Views: 520
I am generated three Rayleigh channel gains including path loss assuming all fixed links
PL1=108; % path loss for BS-RS
PL2=102;% path loss for RS-MS
PL3=118;% path loss for BS-MS
%% Channel gains
Digital communication :: 05-24-2011 22:15 :: barithegreat :: Replies: 0 :: Views: 395
I am working now in path loss in WiMax link
most papers which related with path loss calculations
present the empirical path loss models
Is there any theoretical model to compute the path loss for fixed WiMax system ?
thanks a lot
Digital communication :: 03-10-2012 11:05 :: nafah :: Replies: 1 :: Views: 422
I am trying to simulate SISO communication with many relay serial.
y1 = h1.*x + n1; %Noise addition
Please tell me how should I include path loss exponent in my simulation code? ( path loss depend on dimension betwen Source and Relay)
Thank you very much
Digital communication :: 04-27-2013 02:35 :: robintane :: Replies: 0 :: Views: 229
Without knowing the Tx and Rx antenna gains that is difficult to know but at a very simple level and assuming ideal omnidirectional antennas (0 dbi gain) it would be -82 dB.
path loss in free space
Signal level is not measure in dB, but again using simple assumptions, Tx power of 1000W is 60
RF, Microwave, Antennas and Optics :: 05-07-2013 19:21 :: RealAEL :: Replies: 2 :: Views: 311
i am working with an LTE network deployment so i have to plan in terms of different propagation losses.
the chosen propagation model is COST-231 model
however, i have no idea how to derive the data rate, antenna gain, path loss, noise power. all these things have values and i do not know how to work with them. any help (...)
Network :: 09-12-2013 13:59 :: natasie :: Replies: 0 :: Views: 404
Can anyone give some idea on how to analyse the Rain Fade and Compensation method for Ku-Band Satellite System ? does anyone have any stimulation program to calculate the path loss or matlab code to perform the task.
RF, Microwave, Antennas and Optics :: 03-29-2006 22:48 :: tmltanml :: Replies: 0 :: Views: 877
In cellular network, I want to model channel matrix which compose of small-scale fading(Rayleigh) and large-scale fading. For large-scale fading coefficient compose of path loss and shadow fading. The shadow fading modeled as a lognormal random variable with standard (...)
Digital communication :: 04-12-2010 06:37 :: magcharoen :: Replies: 1 :: Views: 1874
I am new to matlab and i need to simulate,
matlab program to simulate a two path Rayleigh fading channel (using
Rayleigh random variable generator of matlab) with 2 micros time delay and the second path has 3dB lower power than the first path.
Without using (...)
Digital communication :: 02-14-2010 17:34 :: gangofmumbai :: Replies: 1 :: Views: 3729
Hello to everyone,
I am currently working on a matlab project regarding the implementation of different adapting modulaction and coding (AMC) algorithms for a mobile TDMA communication system based on an existing matlab simulation tool developed in cooparation with my university and a company.
This project runs about 1 year now. It has been alr
Digital communication :: 04-22-2012 12:54 :: KostasN :: Replies: 0 :: Views: 854
you can use a 2-tap delay line to model a two path rayleigh fading channel , i.e. , if x is the signal passed through the channel , the output of the channel will be :
where a1 and a2 are rayleigh random variables (slow rayleigh fading envelopes in each path) and taw is the relative delay (...)
Digital communication :: 02-03-2007 05:39 :: amihomo :: Replies: 11 :: Views: 13645
any body plz give me some matlab codes for gsm transmitter/receiver,
codes for freq allocations or some codes abt path loss models(HATA,OKUMARA MODELS)etc thnx
Digital communication :: 08-13-2008 03:25 :: temoor :: Replies: 1 :: Views: 1319
I think attenuation refers to Large Scale fading, i,e path loss
Digital communication :: 10-08-2008 18:46 :: urwelcome :: Replies: 2 :: Views: 993
I urgently need a help on Simulation on BPSK,OFDM in matlab base on the parameters
modulation and communication method BPSK,OFDM
Primary user transmit power 25
path loss exponent 3
Reference distance 1
Digital communication :: 05-03-2009 02:39 :: brimaf2009 :: Replies: 0 :: Views: 2225
refer the book of rappaport
I have read it, but it is not clear for me. All I know about this is that in large-scale fading the fading characteristic changes over large distances, while in small-scale fading it is changed over small distances. But I don't know what causes the large-scale fading, and if ther
Digital communication :: 11-02-2009 07:50 :: saeddawoud :: Replies: 3 :: Views: 15734
does anyone has matlab code for simulate cellular network??
I want to know how to create channel matrix which compose of Rayleigh distribution, distant path loss and shadow fading.
Digital communication :: 04-13-2010 21:58 :: magcharoen :: Replies: 0 :: Views: 1711
any one with matlab code for rician fading signal. and also for Nakagami and weibull.
Digital communication :: 04-23-2010 00:46 :: tadtab :: Replies: 0 :: Views: 2030
Hello to all!
It seems that i might need a little help with the matlab code in a
cooperative spectrum sensing project.
As you will see if you run the code the ROC figures for the theoretic part is correct but for the simulation part is not.Can somebody help me?
u=1000;%time bandwidth factor
Digital communication :: 11-24-2010 06:54 :: manos87 :: Replies: 13 :: Views: 11123
i want to simulate a single-path Rayeligh fading in matlab channel for that
i need to
1) generate a complex Gaussian process with variance 1
2)filter the process with Doppler filter with frequency response H(f)=sqrt(s(f)) and we gonna to use Jakes Doppler Spectrum
3) Scale the filtered Gaussian noise to obtain the the desired average (...)
Digital communication :: 08-13-2011 02:36 :: Qwme5 :: Replies: 7 :: Views: 729
i am trying to code the below SINR equation any clue how to calculate the path gain in the below equation
Digital communication :: 02-17-2013 09:39 :: ayham87 :: Replies: 3 :: Views: 1045
Hi, Friends! I am wondering how to simulate shadow fading.
Refer to document from colorado.edu
"Large-scale variations caused by shadowing of obstacles are shown to follow a log-normal distribution , which means that when measured in dB they follow a Gaussia
Digital communication :: 10-30-2013 04:23 :: kerin :: Replies: 0 :: Views: 274
Hi to all,
If I want to calculate the power loss in tranmission for RF of 2.4 GHz or path loss, what formula should I use...
Someone suggested path loss= 40dB + 20 log(distance in metres)... I do not quite understand where the 40 dB term comes from??
I would greatly helped if (...)
RF, Microwave, Antennas and Optics :: 08-08-2005 13:03 :: sbhalerao :: Replies: 4 :: Views: 1107
The book "Wireless Communication: Principles and Practice" deals with
Mobile Radio Propagation: Large Scale path loss and Small Scale fading and Multipath. This deals in some detail about propagation models used for wireless mobile technology. Refer that book.
Digital communication :: 08-30-2006 13:29 :: magnetra :: Replies: 8 :: Views: 1822
The free space path loss at 14GHz for 200km is 162 dB (without margin for humidity, fading, etc)
From link budget calculation that you have, results approximately -70dBm signal level at the input of the receiver, that should be ok for the data rate that you are looking to transmit.
Mitsubishi makes some good receivers for Ku band:
RF, Microwave, Antennas and Optics :: 10-17-2006 07:00 :: vfone :: Replies: 3 :: Views: 976
Put the toolbox in some directory which is included in the matlab path, e.g. \work or \toolbox. Then, you just call the functions with the formats you should know from the toolbox help or other.
Electronic Elementary Questions :: 05-08-2007 23:15 :: Sal :: Replies: 2 :: Views: 1123
i want to make the gui for my project in matlab. my project includes
1- point to point link calculation for microwave.
2- path loss calculation at Rx.
3- which topology to be used.
4.noise added due to worse temperature.
5-Humadity and Rain effects on Link Power.
can any body helps me out that how to manage my project and how to (...)
Network :: 05-25-2007 07:57 :: Virus King :: Replies: 1 :: Views: 589
Yes, you right. There is a simulation tool called ADS but I don't think it will simulate
a communication transmission environment (with antennas and taking into account the propogation path loss of this link; friis relation etc.)
matlab is a bit difficult for me because its a unviersal tool and I wish to find more sp
Electromagnetic Design and Simulation :: 07-02-2007 21:14 :: itzikhaim :: Replies: 2 :: Views: 599
Hi, I need to simulate the the uplink capacity of MIMO per cell by using Monte (by matlab)Carlo simulations all what I know is the equation which is below and that I have to generate 100 random realizations of user distribution and assume distance dependent path gain as the equation below and I don't know from where I start and how can I assume the
Digital communication :: 10-20-2007 19:24 :: electronicman :: Replies: 0 :: Views: 807