Search Engine

Matlab Rayleigh Noise

Add Question

40 Threads found on Matlab Rayleigh Noise
reg. AWGN and rayleigh fading channel noises, if u are to simulate using matlab, then, AWGN is an additive noise, u would know. generate a signal x say of length 1000, then the corrupted signal with AWGN is, y = x + randn(1,1000) ; where 1,1000 will generate gaussian noise with 1 row and 1000 (...)
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) ); % (...)
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
Hey .... Elaborate ur Query........... Wat type of clean signal You require... Is it u require discrete Sin, Cos , exponenetal, simple pulse strain....... below is a command for generating x = where n = -2 to +2 ----------------------- matlab Command------ n=-2:1:2; x=; % To plot the data stem(n,x); No
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, (...)
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 (...)
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
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 (...)
ur way may be correct but the thing is that i want to implement it in matlab and for that i dont think if i need quantization. the problem i m facing is that my soft viterbi decoder works fine in AWGN channle but when I apply my soft viterbi deocoder in rayleigh fading channel with white Gaussian noise the BER vs SNR graph is same as if (...)
Hello everyone, I've been trying to simulate a rayleigh channel in matlab and have stumbled upon a difficulty. Originaly i was given a simulation that calculates the BER of an AWGN channel in QPSK, and was asked to change it to a rayleigh fading channel. The Original program is as such: (...)
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
Hello, I am new to simulation using matlab, so I need a simple and clear code illustrating the idea. Can you, please, post how to find the SER of BPSK modulation over rayleigh fading channels? Thanks in advance
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.
Hi, I am using matlab 7. But it is showing error in the following line. Y = y./L; % Equalization Please correct. Sudan Hi sudan I had modified the code and it is now working but i am facing the same problem, could you check and let me know and thanks in advance.
Hello, Does anyone have a matlab code for a cooperative diversity communication system with Amplify-and-Forward relaying technique over independent and identically distributed rayleigh fading channels, where all the nodes are equipped with single antenna? Thanks in advance
I am doing a project on simulating wireless channels under fading and their performance.I started with rayleigh fading. I tried simple matlab code which demonstrates y=hx + n(h=rayleigh channel,x=transmitted simbols and n=gaussian noise(AWGN)) clear all N = 10^6; ip = rand(1,N); % generating 0,1 with equal probability (...)
If you are using matlab, Why don't you use the rayleighchan function ?
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
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 (...)
How are you calculating and adding the noise? plz, if u can check the matlab file in the attachment and reply to me where is the error?? thanks for your reply.
hi all could anyone please tell me where can i get matlab coding for ML detection for 4x4 MIMO using MMSE I HAVE TO COMPARE THE ML PERFORMANCE USING MMSE WITH ZF AND MRC THAT IS PLOTTING BER VS SNR FOR 4X4 MIMO :| please help
hey , please help me out i need the matlab codes for 1x2 , 2x1, 2x2 mimo systems comparing there performance on the ber vs eb/no plot.................please help me out if anhbody can provide me with these programs or atleast help me to know where will i get them
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 power
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
Hi all, I have got a rayleigh Fading Channel Simulation code by matlab but its performance about resulting BER is not right. The code list below: N=length(spread_sig); n = sigmaN*(randn(1,N)+1j*randn(1,N))/sqrt(2); % white gaussian noise, 0dB variance h = 1/sqrt(2)*(randn(1,N) + 1j*randn(1,N)); % rayleigh (...)
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.
hello, I'm working in my Graduation Project on MIMO-OFDM Implementation using matlab i made the following code but i m a little lost , can't figure out what to do next , i generated the data , modulated them , then branched the data into 2 branches to be sent , but i cant figure out how to multiply the channel matrix by the modulated data matrix
hi all,I have a matlab code that I found on the net, it is the simulation of a rayleigh channel, can you help me to send a picture on this channel?? code : % Script for computing the BER for BPSK modulation in a % rayleigh fading channel clear N = 10^6 ;% number of bits or symbols % Transmitter ip = rand(1,N)>0.5; % generating 0
hi to all, I'm trying to write a matlab code for image transmission over a rayleigh channel clear all; clc; sampleTime = 1/500000; % Sample time (s) maxDopplerShift = 200; % Maximum Doppler shift of diffuse components (Hz) delayVector = 1.0e-004 * ; % Discrete delays of
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)))
Hi 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
Guys, help me understand why in my matlab code below the BER I get is better than it should be (for coherent BPSK). Maybe I add noise not to the proper sognal or maybe parameter B in raylrnd is improper. %matlab code N=10000;%number of bits s1 = zeros(N*100,1)';%1st path s2 = zeros(N*100,1)';%2ndpath EbNo=20;% Eb/No in dB (...)
Space-time block codes (STBC) versus V-BLAST: The objective is to evaluate the effect of increasing average signal-to-noise ratio (SNR) and channel correlation on the bit error rate (BER) of STBC and V-BLAST for a prescribed spectral efficiency. Consider two wireless systems: i) Alamouti STBC 2x2, and ii) V-BLAST 2x2. To maintain the same spectra
You can use matlab Communications Toolbox to plot BER curve for different modulation schemes and different fading channels including rayleigh, with different variance for a specified Signal to noise range.
Hi, I am going to simulate the performance of ZF equalizer, I know the concept of this equalizer is: if the transmitted signal is Y=H*X+n, the equalizer frequency response will be H_eq=H'/(H'*H), so that Y*H_eq=X+n*H_eq, which means the channel effect on X has removed but noise is enhanced. So I think in matlab, I should define the (...)
Please check the code and let me know if iam doin any mistake . Also I need to apply slow and fast rayleigh fading in this model. The rcd signal is R = SAB + N where R,S,A,B are matrices The matlab code is given below : close all clear all; clc; warning off all K = 27; %No. of users Navg = 1e3; %No. of repi
hi all... 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 english... Thank (...)
The pilot insertion code that you mention is: % pilot insertion pilot_ins_data=[zeros(nsym,6) par_data(:,) zeros(nsym,1) par_data(:, ; Reason for pilot insertion: Here the pilot process added is there to ensure correction of phase noise correction + frequency offset c
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 (...)
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 (...)