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Snr And Ber For Matlab

84 Threads found on edaboard.com: Snr And Ber For Matlab

I need matlab simulation (SNR vs BER)

Dear all I need a matlab file (m file) simulates the snr versus the ber for the convolutional coder and Viterbi decoder with QPSK input if anybody can help please upload. Roshdy

SER(or BER) for 16 QAM in Rayleigh Channel Formula Required

The symbol error probability in each of two arms is 2(M-1)/M Q(sqrt where M=sqrt(16)=4 here. If you were after bit error probability in each arm Gray coding of bits onto the 4 levels would leave you with about 1 bit error per symbol error, so to get P_b you could multiply the above by (1/log_2 M). After multip

Turbo code encoder and decoder in MATLAB

Hi all, I hope you would be able to help me out. I have written a turbo code encoder and decoder in matlab with the specs below: Channel Additive White Gaussian Noise (AWGN) Modulation Binary Phase Shift Keying (BPSK) Component Encoders - Two identical recursive convolutional codes RSC Parameters n = 2, k = 1,K = 3 G0 = 7, G1 = 5 I

plotting SNR vs BER for 4QAM modulation scheme

hi guys !!1 i want to do ber vs snr plotting for 4QAM modulation ...but can you ls say what i really have to do in this case and can you pls provide me the code of matlab with some xplanation to this!!! i really badly need this ...have to do some homework! thanks in advance!!! pls xplain this.......... (...)

BER for OFDM with experimantal measured channel impulse response

I am trying to calculate the ber of OFDM system, lets say using simplest BPSK modulation. I have experimental measurements of the channel impulse response, PDP with amplitudes and delay of the multipath components. I have formed OFDM symbols, modulated them and now it is time to pass them to channel. What is the most (...)

Help me write a school project in Matlab

i have thos [project and my dead line in two days pleas can any one help me for doing this project i could also understande my pro need it to be written in matlab Project 1.2. Consider a communication system that transmits a positive (negative) rectangular pulse with length T to represent 1 (0). Assume 1. (...)

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. (...)

Need Help: Diversity simulation using MATLAB

Hi In order to implement diversity combining you need information about the channel condition. In your noncoherent case you need to know the snr in r1 and r2, which is either obtained from training signas or previous data symbols. with this information you calculate the necessary weights for each branch. (...)

cooperative amplify and forward

has anyone got the snr vs ber graphs for Amplify and forward or any other cooperative MIMO scheme?

Multiplication/scaling factor for gaussian

Hi, Can any one tell me by what factor do I need to multiply with randn command.. to plot ber graph for different values of snr Hello! If you're using matlab you can use awgn function and change the snr values directly.. for (...)

Comparing BER vs SNR for QAM with a reference

Hi I have simulated a QAM modulation in AWGN and I want to compare my result (e.g; ber vs. snr) with a reference to be sure of my detection accuracy. Can you introduce me a reference. Proakis' figures are : ber vs. Eb/N0 as well as matlab ber Tool. I have defined snr (...)

UWB Simulation: correlation between SNR vs RANGE

Hi all, Now, I am preparing my project to simulate UWB technology simulation using Simulink and matlab, especially to evaluate the correlation beteween snr vs RANGE. I am trying to study more the UWB model was created by Martin Clark from But, as a n

MIMO - Can anyone plz help solve this problem for me.....

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, (...)

Problem with simulating OFDM in Matlab

dear sir i am smulating ofdm in matlab but in this mentioned code i am not able to draw graph between ci and ber(ie snr n bit error rate only one point is displayed . plz have a look and help where i went wrong plz correct thanks dhruva % Simulate effect of interfarence noise % (...)

I need a Matlab Code for BER versus SNR for ML RECEIVER

If you plot ber vs. snr with a log-log scale, your error rate curve should be a straight line in large snr region and the slope of the straight line should be -1.

Looking for info about BER VS. SNR standard for GSM

hello! i need help in standard ber VS. snr for GSM

Can anyone shows the SNR v.s BER curve MB OFDM under 55.5M..

Q1: Can anyone shows the snr v.s ber curve of MB OFDM under(bit rate: 55.5M,80M,160M,200M,320M,480M...)in AWGN and multipath channel??? Q2: can some one tell me ,when works under the 200M,as standrad given the parameter (spreading rate=2),where should times the parameter???? is it after the IFFT block????? does (...)

Performance analysis (BER vs SNR) of TH-BPSK system

Hi all, I am working on the performance analysis of Time Hopping - BPSK systems. Can anybody post the matlab code for its implementation and ber vs. snr analysis. Thanks.

BER for OFDM using QPSK & Convolutional Encoding

Thanks for your reply. I suspect my problem is with the noise generation, I have used the inbuilt matlab function to genrate awgn noise y = awgn(x,snr). Is there another way of generating noise apart from this? I can post the code if it will help. Thanks again

mimo ofdm in mobile environment matlab

hello, I am currently studying wireless communication and I am facing a problem in my MIMO OFDM simulation using mimochan function. My problem is mainly that my input signal is not time based and therefore, whatever sampling time I use in the function the snr vs ber is always the same. I would like to (...)

What is the idea of simulating the outage in Matlab?

Hello, for example, when we want to simulate the ber in matlab we send bits over a channel ( fading or other channel ) and then count the bits that do not match. Now, I want to know how do we simulate the Outage probability ( the probability that snr falls down below a specific value ) in (...)

can u help 4 BER performance in MIMO?I need matlab codes for this......

send me the basic requirement , aither ur doing snr vs ber perfromence, which modulation and encoding, so that i can frwd u

i need a matlan code for IDMA using tree based interleaver..

immediately i need a matlab code for IDMA using matrix interleaver... i have to plot graph for ber vs snr... and also i have generate the graph using tree based interleaver.... if anyone know means please help me to complete my project.... thanks

Plotting Data rates vs SNR in 3 node cooperative communication

I draw the ber vs snr and i can't draw the data rate vs the snr as i can't get a direct relation between the data rate ans the snr in the equation? anyhelp?

how to plot Probability of Error Bit Rate against SNR in matlab or Excel

Hello everybody, any one can help me how to write a code can plot y axis in log scale and x axis in normal scale. thanks, - - - Updated - - - What i am trying to say is i've got results displayed for ber using matlab simulink but i don't know how to plot curve of ber. i would be so appreciated (...)

performance evaluation of 802.11g and 802.11a in Simulink

What parameters have to be changed for the two models to be distinguished from one another?? I have downloaded the WLAN files from and 802.11a from . On simulating both the files the outputs are the same in ter

CDMA rake receiver code for snr vs BER

Please check matlab codes for bellow. matlab Source Codes -------------------------------------------------------------------------------- analemma, a program which evaluates the equation of time, a formula for the difference between the uniform 24 hour day and (...)

Matlab code for rician fading channel

Is there anyone who can help me by providing the matlab codes for qpsk & bpsk modulation in riccian channel to find the ber vs snr ? Plz , it z too urgent

Has anyone generated a rayleigh fading channel where there are two transmitters(T1,T2) and two receivers(R1,R2). The information from T1 is to be sent to R1 and information from T2 is to be sent to R2. What is the effect of interference of T1 over R2 in ber vs snr? Is there any (...)

How to do the QPSK modulation in Matlab?

Hi! I support another example that I wrote befroe. It is a example to run the ideal ber/snr curve of BPSK and QPSK system. The simulation result shows the two different almost get the same curve. Hope that is helpful for you. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % the (...)

BER of OFDM,QAM,BPSK in matlab

i am new to this stuff....can anyone help me about this.... how actually to plot this ber graph from matlab....suppose to use pragramming in matlab or simulink? can anyone show me the code to simulate this ber... thx first.... Added after 2 hours 13 minutes: If i already simulate a QAM-16...n count t

My Final Project - Need Help ( Wireless Comm + Matlab)

i have attached a m-file (in the form of txt file) from my previous post graduate assignment which requires me to simulate a bpsk transmission using baseband envelope approach; using either rectangle, sync or raised cosine pulse shaping through a AWGN or Rayleigh flat fading channel. i have also wrote the commands to plot the (...)

How do you get the BER plots using BERTool in MATLAB?

@tmltanml : i am sorry to say your attachment doesn't contain any stuff on berTool. @m_llaa : biterr is only useful for getting the ber balue for a set of data..but i need a plot with varying snr..I had written a function for the same purpose as the biterr does(by using xor (...)

Factor used to scale Noise in 4QAM simulation ???

Hi, i am simulating the 4QAM in matlab. there i need to scale the noise to get the snr vs ber graph. Can any one of you plz tell me the factor by whcih we can scale the noise...and also how u get this factor? P.S. my noise if of type ... noise = randn(1,N) + i * randn(1,N); Waiting.....

Need help in CDMA "matlab"!!

Hi guys ... I need your help! Can you give me any matlab code which inclode simulation of ber vs snr for single user and multi users in CDMA system! Please help me I'm not very good in matlab :(

Iterative decoding....

Hi, This problem occurs when the data is not enough. So, you have to increase your data; especially for high snr. Ahmed

Suggest me some projects for final year

You can take up several simulations in matlab.. to quote a few .. 1) Simulating Various Modulation methods both analog and digital 2) Calculating ber or snr for each modualtion 3) Fading simulation (Mobile Communication) 4) CDMA or GSM Simulation 5) OFDM Simulation Thanks, Mathuranathan.V (...)

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 (...)

matlab code for hard versus soft decision decoding?

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 (...)

Spectral efficiency with matlab in MIMO systems

Hi there, I am looking for a matlab code which computes and plots the spectral efficiency and/or the throughput in a MIMO system for different types of modulation (BPSK, QPSK, 16QAM...). Is there any formulas based on the ber and/or the snr (...)

matlab code for multi-relay cooperative communication system

HI dear, Can you please help me for a two-hop system simulation? i want to simulate the problem of two hop system and then ber vs snr plot. reply plz Added after 45 minutes: please email me, i am also new in this field and want to discuss some problems with you. thanks assad.abbasi@yahoo.com[/e

MB-OFDM Matlab Simulation

I am trying to simulate ber vs snr for MB-OFDM. I have code of OFDDM. Can anyone help me. I am using matlab.

Where to sample the output in BPSK demodulator using Matlab?

Hello, I think to reduce the ber, you have to begin sampling your received signal at its maximum value. This will give the maximum snr.

theoretical curve for BER of ASK

Coherent ASK detection has the same Eb/N0 characteristic as coherent FSK detection. If you have matlab you can utilize the bertool... snr = (0:1:18 ); ber = berawgn(snr, 'fsk', 2, 'coherent'); figure; semilogy(snr, ber); grid on; xlabel('E_b/N_0 (...)

hi, I'm trying to convert the dvb-t 2k demo in matlab r2009b to work in 8k mode. I made some changes to commdvbt.mdl file and to table_gen.m file. The demo works, but not correctly. It gives ber around 0.5 for all vaues for snr in AWGN channel. What could be the problem? biserka

+ 100 Points- Quary in WiMAX model.

Dear all I am in urgent need to solove the quary in wimax MIMO-OFDM mode. In this model, after running the program, 1 is to be entered for including the MIMO and O for single input single output system. How ever my qaury is in both the cases, with same parameter (i.e. channel bandwidth, snr etc), i am (...)

Need help with MIMO BER MATLAB Simulation

Hello everyone I have made the following code but there was a problem and am seeking help % the first task is to generate a bpsk signal and simulate the ber and the second task is to convert this to MIMO clear;clc; N = 1e4; % Number of data bits Nt = 1; (...)

Matlab Code for matrix interleaver in IDMA

Hello Everyone I actually need of a matlab code which is using matrix interleaver in idma. i want to check its ber vs snr performance. and i also want to simulate my interleaver in place of matrix interleaver. So kindly tell me what are the parameters on which interleaver performance (...)

How to model multipath propagation in matlab?

first of all, create your modulation then pass it through the channel, this must be done in steps as follows: 1. create you multipath channel object using this command (rayleighchan). 2. use the filter function to add your signal to the channel using this command (filter(x,channel)) 3. create a loop for your noise such as from 0 to (...)

BER output problem for Radio over Fiber system/Optical Comm

Hi guys, this is my first work in optical and first simulation in matlab. I am sorry if there is mistake and im really new to this. Here is what I did, im simulation an entire Radio Over Fiber system with matlab, linear system. Let me insert my code first, %*****************************Defining (...)