# Bit Error Rate Simulation Matlab

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msg = randi([0 1],k*200,1); % **200 messages of k bits** each code = encode(msg,n,k,'hamming'); codenoisy = rem(code+(rand(n*200,1)>.95),2); % Add noise. % Decode and correct some errors. Modulate the message signal using baseband modulation. Reply Vishnavi December 24, 2012 at 7:16 am Hi ,I need program for BER reduction using SSPA(solid state power amplifer ) model .or else BER reduction using PTS scheme. or there is other things that i should to change ? check my blog

Reply Krishna Sankar February 6, 2012 at 5:15 am @Sivaganesh: I have discussed only two error correcting codes: a) Hamming code and decoder http://www.dsplog.com/2009/09/29/hamming-74-code-with-hard-decision-decoding/ b) Viterbi decoder (hard and soft) http://www.dsplog.com/tag/viterbi/ why this problem happened? God will bless you. It uses the berfit function to fit a curve to the somewhat rough set of empirical error rates.

## Bit Error Rate Matlab Code

Store the result of this step as rxsig for later use.Invoke the semianalytic function using the txsig and rxsig data from earlier steps. Further, I have written a post doing BER computation with rectangular pulse shaping with matched filtering http://www.dsplog.com/2009/05/08/ber-with-matched-filtering/ Reply prashant goad July 20, 2010 at 3:00 pm hey krushna That really BERTool computes the BER as a function of signal-to-noise ratio. Reply Krishna Sankar March 28, 2010 at 1:55 pm @Ananya: A good book to read is OFDM Wireless LANs: A Theoretical and Practical Guide by Juha Heiskala , John Terry Reply

Reply Krishna Sankar April 4, 2010 at 4:50 am @anis: If we initialize, we can ensure that the same random numbers are generated in any run Reply kishore January 25, Total probability of bit error . Reply moyeen May 6, 2011 at 1:48 pm Hi Krishna, I am working on different modulation technique. Simulation In Matlab Tutorial Please help me.

i.e. How To Calculate Bit Error Rate In Matlab please send me code , this very helpful for me. After artificially adding noise to the encoded message, it compares the resulting noisy code to the original code. where No is noise power spectral density.

Reply Krishna Sankar December 7, 2009 at 4:34 am @Hamid: The negative sign came as I am scaling the noise voltage. Simulation In Matlab Pdf **Thanks. **For example, you can graphically compare simulation data with theoretical results or simulation data from a series of similar models of a communication system.Fit a curve to a set of simulation In fig 4, 5 ,… we have average SNR in horizontal axis and I don't know how select from 0 to 30 db best regards Reply Krishna Sankar February 8, 2012

## How To Calculate Bit Error Rate In Matlab

while (berVec(2,jj) < numerrmin) msg = randi([0,M-1], siglen, 1); % Generate message sequence. than the theoretical one ,which is the same as BPSK without spreading . Bit Error Rate Matlab Code nErr is the count of errors. How To Plot Bit Error Rate In Matlab Reply Krishna Sankar December 25, 2012 at 5:46 am @Vishnavi: Sorry, I do not know the topic.

Reply Krishna Sankar April 4, 2010 at 4:24 am @anne na: Why are you using soft decision, unless you have some decoder like Viterbi following your demapper. http://sovidi.com/bit-error/bit-error-rate-matlab.php Krishna Would you help me in my project!!! Am thinking is Eb_No_dB =[0:10], [0:20], [0:30] and so on, but am not very sure. This function enables you toCustomize various relevant aspects of the curve-fitting process, such as the type of closed-form function (from a list of preset choices) used to generate the fit.Plot empirical Bit Error Rate Calculation Using Matlab

Hence did not put those in place. Reply adah December 30, 2009 at 7:12 am dear krishna… In theory, when i applied my SNR into your coding, i got the result. So I should be very grateful if you can help me with this. news Hope to do so Reply anne na February 4, 2010 at 2:24 pm hi, I would like to demodulate QPSK but using soft decision.

This is very urgent., Please click on below mentioned web address. Simulation In Matlab Examples Close Was this topic helpful? × Select Your Country Choose your country to get translated content where available and see local events and offers. a) In the case of baseband transmissions, we send the information on pulses and in the most simplest case, we send out rectangular pulses of varying amplitude to convey the information

## Compute theoretical error rate using BERAWGN.

and . I corrected it. i have not discussed turbo codes yet in the blog. Modeling Matlab Web browsers do not support MATLAB commands.

clc clear all close all ber=[]; x= randint(1,200); y= [2]; k= log2(y); z= reshape(x,length(x)/k,k); d=bi2de(z); M=[2]; s=pskmod(d,M);%Psk modulation scatterplot(s); snr=[-3:35]; ber1=[]; for i=snr; p=awgn(s,i); q=pskdemod(p,M);%psk demodulation z1=de2bi(q); d1=reshape(z1,1,length(x)); [r,b3]=biterr(x,d1); ber1=[ber1,b3]; end Click the button below to return to the English verison of the page. Your post save me a lot of time to focus on the real subject of my work. More about the author If you do not provide k as an input argument, the function defines it internally as the number of bits in the simplest binary representation of the largest among all elements

is it the same to 16-PSK and just change M=8 only?