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1000 Threads found on edaboard.com: **Path Loss Fading Matlab**

Hi,
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
thank you

Digital communication :: 12-30-2012 18:52 :: eng_basem :: Replies: **0** :: Views: **325**

dear all,
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.
regards
sohkha

Digital communication :: 08-18-2009 02:25 :: sohkha :: Replies: **2** :: Views: **753**

Hi,
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)
Regards

Digital communication :: 11-16-2010 03:30 :: Bhanumurthy :: Replies: **3** :: Views: **949**

hi,
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:
x=rand(1,200);
y=rand(1,200);
xx=corr2(x,y)
yy=corr2((10.^(x./10)),(10.^(y./10))) % From dB to linear and then correlated
Thanks
imti

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**

hi mukul,
I seems to remember that Mathworks has simulink model of the communication system with the multi**path** **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:
P**loss** = 20*log((4*Pi*d)/Lambda)
where:
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
pl

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)
where
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.
Roger Freeman

Software Requests :: 03-06-2008 18:40 :: Roger Freeman :: Replies: **4** :: Views: **262**

Hi
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 multi**path**. 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**

greetings
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
tx/

Digital communication :: 10-29-2009 14:50 :: bee :: Replies: **0** :: Views: **649**

Hi mates
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 .
Many thanks

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**

Hi,
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
H_BS1_RS1=(1/sqrt(2)).*; (...)

Digital communication :: 05-24-2011 22:15 :: barithegreat :: Replies: **0** :: Views: **395**

hi all
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**

Dear
I am trying to simulate SISO communication with many relay serial.
y1 = h1.*x + n1; %Noise addition
r1=y1./h1; %Receiver
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**

hey everyone,
i am working with an LTE network deployment so i have to plan in terms of different propagation **loss**es.
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**

Hi All,
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.
Thanks.
:cry:

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**

hi,
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**

hi
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 :
y(n)=a1.*x(n)+a2.*x(n-taw)
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**

Hi everyone,
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
Frequency

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**.
Please help
thank you

Digital communication :: 04-13-2010 21:58 :: magcharoen :: Replies: **0** :: Views: **1711**

Hi
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?
clear all;
close all;
clc
u=1000;%time bandwidth factor
N=2*u;%samples
a=

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**

hello guys,
i am trying to code the below SINR equation any clue how to calculate the **path** gain in the below equation
87070

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 Multi**path**. This deals in some detail about propagation models used for wireless mobile technology. Refer that book.
M

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:
glob

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.
Sal

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**

Hello Salem_eng1!
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**

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