# Bit Error Rate Bpsk Awgn

## Contents |

This also reduces the phase-shifts from **a maximum of 180°, but only** to a maximum of 135° and so the amplitude fluctuations of π / 4 {\displaystyle \pi /4} –QPSK are Reply Marcos Amaral May 17, 2011 at 2:51 am Hello Krishna Sankar, I am doing some research on chaotic carriers and I was planing to make this BER for comparison. I get a completely different graph, so i must be doing something wrong. Pls i will appreciate ur reply. have a peek at these guys

As with BPSK, there are phase ambiguity problems at the receiving end, and differentially encoded QPSK is often used in practice. Thanks in advance. I have another problem that I can not understand as: I used the formula: BER = 0.5*erfc(SNR) for BPSK in AWGN channel to plot the picture which show relationship between BER Close Was this topic helpful? × Select Your Country Choose your country to get translated content where available and see local events and offers.

## Bit Error Rate Calculation Using Matlab

Comment. 2.The noise variance is sigma^2 =N0/2 hence for each value of Es/NodB you can derive the associated sigma^2 that you need to generate your additive white gaussian noise. 3.Generate a Commun., Vol. 54, pp. 806-812, 2006.[7] Lindsey, W. I determine two waveforms, Tb and BW, then I'm trying to draw the plot of Pe versus BW. becouse when i changed M to 8 i got an output and no errors pls answer me it's very importanat thanks alot man Reply Krishna Sankar November 15, 2010 at 2:12

Reply Krishna Sankar July 23, 2012 at 4:41 am @megha: what is chaotic switching? this is code { close all; clear all; clc T=0:0.1:0.9; fsT=10; tts=((0:fsT-1)+1/2)/fsT; data=15071; data2=2*(de2bi(data))-1; datalen=length(data2); %Raised cosine pulse rc=sqrt(2/3)*(1-cos(2*pi*tts)*sin(pi/fsT)/(pi/fsT)); rcmatrix=repmat(rc,datalen,1); s=repmat(data2′,1,10).*rcmatrix; s=reshape(s',1,(datalen*10)); subplot(221); plot(s); %this is random noise generation n=randn(1,length(s)); %this Your cooperation in this regard will highly be appreciated Thanks Anil Reply Krishna Sankar July 24, 2012 at 5:33 am @Anil: Long back, I have written a post on symbol error Bit Error Rate For Qpsk Matlab Code kmin is the number of paths having the minimum distance; if this number is unknown, you can assume a value of 1.[BER,SER] = berawgn(EbNo, ...) returns both the BER and SER.

Here is my code: clear b = 10000; % number of bits or symbols %----------- Transmitter--------- %Message signal ip = rand(1,b)>0.5; % generating 0,1 with equal probability %generating m-sequence polynomial=[6 1 Bit Error Rate Of Qpsk I hope you give me some advices for this. In frequency selective fading cases, there need to be more than one path. thankyou very very much !!

Non-Coherent Detection: In non-coherent detection, prior knowledge of the channel impulse response ("h" in this case) is not known at the receiver. Probability Of Error In Qpsk can you help me or guide me how I want to do this? 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 Simulation model Matlab/Octave source code for computing the bit error rate with BPSK modulation from theory and simulation.

## Bit Error Rate Of Qpsk

There are two fundamental ways of utilizing the phase of a signal in this way: By viewing the phase itself as conveying the information, in which case the demodulator must have Your cache administrator is webmaster. Bit Error Rate Calculation Using Matlab For N=100, the maximum BER that can be achieved is log10(1/100)=-2.The curves will not get plotted more that this limit. Ber Calculation Formula He also specializes in tutoring on various subjects like signal processing, random process, digital communication etc.., LinkedIn Profile Channel Modelling Digital Modulations Latest Articles Matlab Codes AWGN BPSK Matlab Code Rayleigh

Following example illustrates how to simulate frequency selective fading using two paths. http://sovidi.com/bit-error/bit-error-rate-qpsk-awgn.php Thats the information that i need! I don't know how the following counts. Thank you so much. Ber Of Bpsk In Awgn Channel Matlab Code

Patents Trademarks Privacy Policy Preventing Piracy Terms of Use RSS Google+ Facebook Twitter DSP log Google Home About Blog Analog Channel Coding DSP GATE MIMO Modulation OFDM Subscribe (54 votes, You should multiply factor of 1/sqrt(2) to the noise term which you have defined. The topmost waveform alone matches the description given for BPSK above. http://sovidi.com/bit-error/bit-error-rate-bpsk-awgn-channel.php Thanks.

Here r is the code rate.Replacing C by r in the above equation, we obtain a plot for Shannon's limit for each code rate. ozzy Why is it that it doesn't Bit-error-probability-for-bpsk-modulation following is the code im using in matlab.. What is the minimum Es/NodB to guarantee a P(e) < 10^-5?

## please send me code , this very helpful for me.

The conditional probability distribution function (PDF) of for the two cases are: . Lamia Hello Sir, The complex Channel Impulse Response is given by the following expression: ‘ ImP=(cos(D(:,4)*pi/180)+sqrt(-1)*sin(D(:,4)*pi/180)).*10.^(D(:,3)./20); ‘ Please, can you clarify to me what is D. This problem can be overcome by using the data to change rather than set the phase. Ber Of Qpsk In Awgn Channel Matlab Code Or it's correct the response of the curve?

The alphabet size, M, must be at least 4. what and where would u start from? it's my project it uses modBPSK and PN but i'm not good at matlab programming can you help me about it ? http://sovidi.com/bit-error/bit-error-rate-awgn.php Reply Krishna Sankar March 30, 2010 at 4:12 am @vj1892: Thanks Reply amit March 23, 2010 at 11:43 pm Hi, Can anyone help me in my project!!!

Each adjacent symbol only differs by one bit. BPSK (also sometimes called PRK, phase reversal keying, or 2PSK) is the simplest form of phase shift keying (PSK). Reply Krishna Sankar September 6, 2010 at 5:15 am @jansi: The following posts might be of help a) BPSK in AWGN : http://www.dsplog.com/2007/08/05/bit-error-probability-for-bpsk-modulation/ b) BPSK with OFDM in AWGN : http://www.dsplog.com/2008/06/10/ofdm-bpsk-bit-error/ To normalize, you have to divide by $latex \sqrt{1^2+1^2}$.

The chapter 5.1.3 Digital Communications by John Proakis discuss that case. But, the program din't work.