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# Bit Error Rate For Bpsk

## Contents

Reply Hemanth July 29, 2009 at 5:14 pm Hi Krishna, When you derived an expression for the average probability of symbol error in a rayleigh channel, you obtained a linear Archived August 28, 2007, at the Wayback Machine. ^ IEEE Std 802.11b-1999 (R2003) — the IEEE 802.11b specification. ^ IEEE Std 802.11g-2003 — the IEEE 802.11g specification. ^ Understanding the Requirements xlabel('E_b/N_0 (dB)'); ylabel('Upper Bound on BER'); title('Theoretical Bound on BER for Convolutional Coding'); grid on;This example produces the following plot. for eg, bpsk in awgn requires around 7dB of Eb/N0 to hit 10^-3 ber. http://sovidi.com/bit-error/bit-error-rate-of-bpsk.php

Reply shadat December 6, 2009 at 2:09 pm hi krisna, i hope you are fine.plz could you send me BPSK,QPSK,16QAM,64QAM modulation and demodulation simulation in matlab and simulation of adaptive For eg, a receiver with a 20MHz bandwidth will have a thermal noise power of -174dBm/Hz + 10*log10(20e6) = -101dBm. Reply prabag December 7, 2009 at 11:52 am Hi I would like to know that how IFFT makes signls to be orthogonally modulated in OFDM..also when we give 1s and 0s The binary data stream is shown beneath the time axis.

## Bit Error Rate Calculation For Bpsk

This section describes how to compare the data messages that enter and leave the simulation.Another example of computing performance results via simulation is in Curve Fitting for Error Rate Plots in Since the data to be conveyed are usually binary, the PSK scheme is usually designed with the number of constellation points being a power of 2. haha Reply Krishna Sankar October 15, 2012 at 6:25 am @Fan: I know as much Chinese as I know Spanish Xie xie Reply payel saha September 21, 2012 at 9:34 Bit Error Rate Pdf the problem could be with the addition of the noise ; I did multiply the transmitted chips by 1/sqrt(N) ,where N is spreading factor ,in order to make sure that the

For details on how to adapt the semianalytic technique for non-Gaussian noise, see the discussion of generalized exponential distributions in [11].Procedure for the Semianalytic TechniqueThe procedure below describes how you would So, your results will be poorer due to the additional interference from the undesired user. OR upload to an online site like dropbox and paste the public url Reply Fan Ding October 11, 2012 at 6:27 am Your posts help me a lot,thks. Reply Krishna Sankar December 7, 2009 at 4:34 am @Hamid: The negative sign came as I am scaling the noise voltage.

For your case, its bit more complex. Bit Error Rate Tester Please give hints to write equations as you have written. Reply Krishna Sankar May 20, 2009 at 5:45 am @fof: Good luck. this is exactly my question.

## Qpsk Bit Error Rate

Hope this post might be of help http://www.dsplog.com/2008/08/10/ber-bpsk-rayleigh-channel/ Reply Hamid November 25, 2009 at 4:37 pm hi Why you are using 10^(-Eb_No_db(ii)/20) the minus sign in this formula because for Plz reply asap thanks Reply Krishna Sankar March 5, 2012 at 5:37 am @Ritesh: Have not tried to simulate Rician channel Reply Pranjal Gogoi February 3, 2012 at 8:36 pm Bit Error Rate Calculation For Bpsk Reply Sara November 3, 2009 at 7:38 pm Hi Krishna I have a problem in my m.file.I produce a symbol strean by x=randint(N,1,M) where M is the order of modulation, the Acceptable Bit Error Rate Your post save me a lot of time to focus on the real subject of my work.

Reply hakar April 18, 2010 at 6:52 pm beatiful work krishna, i wonder if you have the same simulation for QPSK in matlab…thanks Reply eca April 13, 2010 at 9:08 http://sovidi.com/bit-error/bit-error-rate-bpsk-awgn.php h = 1/sqrt(2)*[randn(1,N) + j*randn(1,N)]; % Rayleigh channel 2. Good luck in your algorithm explorations. Krishna Sankar March 21, 2009 at 7:00 am @Martin: Sorry, I am not familiar with the system model which you proposing. Note that the signal-space points for BPSK do not need to split the symbol (bit) energy over the two carriers in the scheme shown in the BPSK constellation diagram. Bit Error Rate Measurement

Reply Ajith July 24, 2010 at 4:46 pm Oops i am sorry if this is a total blunder.. Then it decodes and compares the decoded message to the original one.m = 3; n = 2^m-1; k = n-m; % Prepare to use Hamming code. The system model is as shown in the Figure below. http://sovidi.com/bit-error/bit-error-rate-bpsk.php It high time we discuss the BER for BPSK in a Rayleigh multipath channel.

You must wait until the tool generates all data points before clicking for more information.If you configure the Semianalytic or Theoretical tab in a way that is already reflected in an Bit Error Rate Tester Software 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 channel can include multipath fading effects, phase shifts, amplifier nonlinearities, quantization, and additional filtering, but it must not include noise.

## Generate BPSK-modulated random data for the desired signal and interfering users. 2.

Step3: Decide how much Sync you need, based on Channel. I think " because we signal processing engineers are trying to figure out ways for improving the performance" can be undestandbe that if channel estimation is perfect, we can try to Diversity order ≧1 For more information about specific combinations of parameters, including bibliographic references that contain closed-form expressions, see the reference page for the berfading function.Using the Semianalytic Technique to Compute Bit Error Rate Testing V.; Yuldashev, R.

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 See also Differential coding Modulation — for an overview of all modulation schemes Phase modulation (PM) — the analogue equivalent of PSK Polar modulation PSK31 PSK63 Binary offset carrier modulation Notes The transmitted carrier can undergo numbers of phase changes. http://sovidi.com/bit-error/bit-error-rate-of-qpsk-and-bpsk.php if u have QPSK matlab code for BER in Rayleigh channel, pls send me.

noisyVec = step(comm.ErrorRate,code,codenoisy); decodedVec = step(comm.ErrorRate,msg,newmsg); disp(['Error rate in the received code: ',num2str(noisyVec(1))]) disp(['Error rate after decoding: ',num2str(decodedVec(1))])The output is below. Another way for finding the bit error rate might be to find the pdf of . MathWorks does not warrant, and disclaims all liability for, the accuracy, suitability, or fitness for purpose of the translation. plz help me thanks Reply Krishna Sankar October 1, 2009 at 5:21 am @mak_m: 1/ Yes, with OFDM, the 10 tap channel is in effect gives same performance as flat fading

right? some papers do list down in a table the channel as complex values between each transmit and receive antenna to get a MIMO channel matrix, how did they get such values? Also, if we use lowpass filter, instead of AWGN is there a change? Additionaly the transmitted signal will be up-mixed and then down-mixed, exactly as you described in the IQ-Imbalance article, but without the phase imbalance.

Reply Krishna Sankar September 18, 2012 at 5:38 am @ebtesam jumma: For the BPSK BER in Rayleigh channel case, please take a look at http://www.dsplog.com/2008/08/10/ber-bpsk-rayleigh-channel/ http://www.dsplog.com/2008/08/26/ofdm-rayleigh-channel-ber-bpsk/ http://www.dsplog.com/2009/01/22/derivation-ber-rayleigh-channel/ Reply vanness August Assume without loss of generality that the phase of the carrier wave is zero. In the same gure plot ("red" line) the theoretical P(e) of a BPSK (see slides). A common approach is to start with an augmented binary pseudonoise (PN) sequence of total length (log2M)ML.

Reply Krishna Sankar January 6, 2012 at 6:12 am @Nam: Well, the 16QAM is more error prone when compared to BPSK. Some equalization structures for a 2×2 MIMO with V-Blast are discussed in http://www.dsplog.com/tag/mimo Hope this helps. Reply Krishna Sankar April 13, 2010 at 6:18 am @fizzle: Well, if you divide signal power by noise power, the resultant is signal to noise ratio Reply vj1892 March 29, It is known that the typical RMS delay spread  of multipath propagation in this scenario is around 5 s.

I'm looking for the introduction to simulate BER performance in Rayleigh fading channel and this is a very nice post {BER for BPSK in Rayleigh channel}. ynoisy = zeros(n,length(snr)); z = zeros(n,length(snr)); berVec = zeros(3,length(EbNo)); % PAM modulation and demodulation system objects h = comm.PAMModulator(M); h2 = comm.PAMDemodulator(M); % AWGNChannel System object hChan = comm.AWGNChannel('NoiseMethod', 'Signal to Approach: Now I have to choose modulation technique, error correction algorithm. However, this example uses a small number of errors merely to illustrate how curve fitting can smooth out a rough data set.% Set up initial parameters.

nErr(kk,jj,ii) = size(find([ip- ipHat]),2); Both Matlab and Octave supports multi dimensional matrices.