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# Matlab Rayleigh Noise

18 Threads found on edaboard.com: Matlab Rayleigh Noise

## i need matlab for this system dynamics

a random rayleigh flat-fading channel object based on Jake?s model is generated in matlab with sampling period of 10 μs and the maximum Doppler shift is set to 200 Hz. The additive white Gaussian noise with SNR of 23 dB is used. The required BER is set to 10−3 and the average transmit power is fixed at 0.2 W. Two independent (...)

## matlab - basic MIMO (multiple input multipe output) system code

i really need help with matlab code to create a basic 2x2 mimo system. I am a noob so please explain thoroughly. and i would also like to know how it can be changed to simulate a 4x4 etc. it doesnt need rayleigh fading or any noise as of yet. Just a basic mimo system. Thanks

## Does higher stage convolutional trellis encoder correct more error?

I am writing a matlab code about convolutional encoder. I have created trellis for 4,8,16 and 32 states and their corresponding viterbi decoder(using vitdec matlab function). My system goes like this: Trellis Encoder-->DPSK Modulator-->rayleigh fading Channel + awgn noise-->DPSK Demodulator-->Viterbi Decoder For the 4 (...)

## Does higher stage convolutional trellis encoder corrects more error?

I am writing a matlab code about convolutional encoder. I have created trellis for 4,8,16 and 32 states and their corresponding viterbi decoder(using vitdec matlab function). My system goes like this: Trellis Encoder-->DPSK Modulator-->rayleigh fading Channel + awgn noise-->DPSK Demodulator-->Viterbi Decoder For the 4 (...)

## noise and fading channel formula for QPSK

Hi, in QPSK system: what are the matlab equations for noise and fading channel? also; what is the theoritical equation for calculating BER? this is because I see several different formula, for example: 1- N0 = 1/10^(SNR(i)/10); n = sqrt(N0/2)*(randn(1,length(sig))+1i*randn(1,length(sig))); h = sqrt(0.5*((randn(1,length(sig)))

## Matlab neural network code for prediction

Help me for neural network code for predicting a the errors in matlab and to succesfully receive the transmitted bits at the receiver end in a channel which is affected by rayleigh fading and gaussian noise.

use rayleighchan() matlab function directly.

## fast and slow Rayleigh fading channel

Can any one tell me what is the difference between fast and slow rayleigh fading channel? And how can I represent them be matlab? Thanks in advance

## BPSK BER in rayleigh IN MATLAB : why noise and channel is the same in matlab.

I have a look on people's matlab on BPSK BER over rayleigh channel. I don't understand why noise and channel are the same as shown below. so rayleigh channel is the same as noise then? Can anyone explain it to me please. noise=1/sqrt(2)*(randn(1,N)+1i*randn(1,N)); %AWGN (...)

## Regarding DVB-T Matlab demo simulation

Hi, According DVB-T demo in matlab Communication block set, it is a fair simulation model with not having guard interval and so on. But we can simulate in AWGN noise and this shows zero BER. But after i modified by inlcuding rayleigh Multipath channel the BER is increasing to 0.5. That means i need to add something at the reciver (...)

## MatLab QPSK, Flat Rayleigh Fading Channel, Thermal Noise Simulation

I have an assignment on mobile communications and it's on Matalab and I need some help on some of the components that make up the code. I need to create a component that generates information bearing bits from the binary set {0 1}. Every 200 bits should form a frame. Also, I need to create a QPSK modulator that maps two binary bits to QPSK sy

## BEGINNER: Rayleigh fading using matlab

Hi am using matlab 2007, what is "modulate(modem.pskmod,x)" ? can't u use directly pskmod? that is what i used in your code and obtained err of 50%, still very high.... so i suggest u use an equalizer onteh received signal before demodulating to reduce the efffect of the channel.

## MATLAB Different Fading Channel Simulations

Hi all, I am trying to simulate different fading channels in matlab (rayleigh, Nakagami, Log-normal). I have done the rayleigh but need some help with the Nakagami and Log-normal Fading. For the rayleigh Case I have % rayleigh fading X = sqrt(0.5)*( randn( 1, symbols_per_frame) + j*randn( 1, (...)

## urgent matlab help confuse.....

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 p(gama)=(1/gama_ave).*esp(-gama/gama_ave); so what is relation between two commands ? thanks

## Maximum Ratio combiner in Multipath Rayleigh fading channel

Hi, Could you please help me how to use the Maximum Ratio combination in Multipath rayleigh fading channel, using matlab comands, and have a look for the program bellow you will see the error that I have, and could you tell me the problem, and how to solve it. clear all whos SNR=0:2:20; %Range of noise in dB. M=2; % DBPSK (...)

## MatLab :: Rayleigh fading using the filter methodology !!!

Could anyone please help me about the matlab code simulating the rayleigh fading in which having the white guassian noise and the doppler filters? Also,it will be very thankful if you could explain me some brief idea about it. ^__^" Read the Simulink PDF - it comes on the CD. It exlains it. It is NOT easy t

## 16 QAM and rayleigh channel with 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. noise=1/sqrt(2)*(randn(N,1)+sqrt(-1)*randn(N,1)); is the AWGN. s_hat=sqrt(snr(k)).*abs(ch).*X + nois

## Matlab Rayleigh Fading Channel Simulation?

Hi all, I have got a rayleigh Fading Channel Simulation code by matlab. The code list below: % rayleigh fading a = sqrt(0.5)*( randn( 1, symbols_per_frame) + j*randn( 1, symbols_per_frame) ); % complex noise noise = sqrt(variance)*( randn(1,symbols_per_frame) + j*randn(1,symbols_per_frame) ); % (...)