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## Bit Error Probability For Qpsk

## Error Probability In Flat Fading Channels

## I am trying to compare different modulation schemes and I want to do a fair comparison.

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and also Rician channel as well **, this for** my project .could u help me please.asap thanks regards thanesh Reply Krishna Sankar December 7, 2009 at 4:29 am @thanesh: Hope you Figure: Constellation plot for QPSK (4-QAM) constellation The scaling factor of is for normalizing the average energy of the transmitted symbols to 1, assuming that all the constellation points are equally However, if you are facing some problems in the simulation, you may ping me. What do you think? http://bsdupdates.com/probability-of/probability-of-bit-error-for-qpsk.php

When k=log2M is odd, a rectangular **constellation of size** M=I×J is used, where I=2k−12 and J=2k+12.ber = berfading(EbNo,'psk',M,divorder) returns the BER for coherently detected PSK over an uncoded Rayleigh fading channel.ber and when i want to excute for exemple modulation , i go on program principal and we excute directly the comand of modulation . Kindly do let know, if you find some further references. However I am getting nice MSE curve after interpolation. my company

Happy learning. Reply Krishna Sankar June 12, 2008 at 5:36 am @ansar: Let me try to answer" If s2 is not present, the area occupied by s2 can be used by both s3 http://www.dsplog.com/tag/gray/ Reply Abhijit February 22, **2010 at 10:57** pm Could you please explain how u are taking the data values for qpsk in the line ip = (2*(rand(1,N)>0.5)-1) + j*(2*(rand(1,N)>0.5)-1);

- Hope you agree to this perspective?
- But the problem is that when i take the data value in Matlab using randint function then it takes the equivalent values of qpsk but the problem is that how do
- Reply Krishna Sankar March 28, 2010 at 2:34 pm @riki: I have not seen the standard 802.15.4.

C., Digital Communication Techniques - Signal Design and Detection, Prentice-Hall, 1995.[7] Simon, M. phaserr is the standard deviation of the reference carrier phase error in radians.[BER,SER] = berfading(EbNo, ...) returns both the BER and SER. Reply Krishna Sankar June 30, 2009 at 4:59 am @Rabbi: Oh, you are interpolating in time. Oqpsk Vs Qpsk Probability of real component of greater than 0, given was transmitted is (i.e.

Pb ~= Ps/k, where Pb is the probability of bit error Ps is the probability of symbol error k is the number of bits in each symbol (for 4QAM, k = Error Probability In Flat Fading Channels Reply Anthony November 1, 2008 at 9:28 am Thanks for the quick response. C., "Error probabilities for Rician fading multichannel reception of binary and N-ary signals", IEEE Trans. For finding Packet Error Rate probability, we will group N bits to form a packet, and flag that packet as error if anyone of the bit in that packet is in

Once the SER results are obtained, getting the BER results should be straightforward. Bpsk Probability Of Error Derivation However, since BPSK is a real signal, the spectrum is symmetric around fc. Similarly for s1, the decision region will be the quadrant occupied by s1 plus lower half of the triangular area of the quadrant occupied by s2. For higher values of , the second term in the equation becomes negligible and the probability of error can be approximated as, .

I used to get help from your uploads and comments often. The system returned: (22) Invalid argument The remote host or network may be down. Bit Error Probability For Qpsk i will b thankful if u help me.. Ber For Qpsk Matlab Code theorySer = 1-sqrt(snr_linear./(snr_linear+1)); Reply Krishna Sankar May 23, 2011 at 2:27 am @Abrar: Are you missing a 1/2 term?

thanks! this page Use Gray code (00,01,11,10) Use Matlab to write program. K , "On the bit-error probability of differentially encoded QPSK and offset QPSK in the presence of carrier synchronization", IEEE Trans. Because only one bit changes at any one time, the readout is glitch-free. Oqpsk Modulation

if it is possible the one used by IEEE 802.15.4? I am not doing any phase error correction. Don't use Gray code (00,01,10,11) 2. get redirected here regards, Hassan Reply Krishna Sankar November 17, 2010 at 4:38 am @Hassan: I have a post on 16 QAM Bit Error Rate @ http://www.dsplog.com/2008/06/05/16qam-bit-error-gray-mapping Hope that helps.

Well, I do not think they mean the same thing. Oqpsk Modulation And Demodulation a) Es/N0 = k*Eb/No where, - Es/N0 is the symbol to noise ratio, - k is the number of bits in the symbol and - Eb/N0 is the bit to noise Related posts: Symbol Error Rate (SER) for 16-QAM Symbol Error Rate for 16PSK Symbol Error Rate (SER) for 4-PAM Comparing 16PSK vs 16QAM for symbol error rate Tagged as: AWGN, PSK,

Reply Allyson March 13, 2009 at 1:45 pm Just Curious, In the codes, you have ip= …… As I know.. Barry, Edward A. URI: http://www.dsplog.com/2008/06/05/16qam-bit-error-gray-mapping/. Probability Of Error In Bpsk Reply Krishna Sankar October 31, 2008 at 7:02 am @Anthony: Well, as you know, the symbol error rate(SER) vs Es/No curve of QPSK is worse than BPSK by around 3dB.

Is it by puncturing? Theory, Vol. Compare several options and make a recommendation. useful reference The system returned: (22) Invalid argument The remote host or network may be down.

I find a problem of simulation of the chaine of transmission cdma on simulink and calculation of the error rate. i dunno where m wrong? Commun., 1976.[3] Cho, K., and Yoon, D., "On the general BER expression of one- and two-dimensional amplitude modulations", IEEE Trans. I thought the bandwidth for BPSK is fc-1/2T to fc+1/2T.

Reply Ali July 23, 2009 at 9:13 am what is the relation between BER or SER and Signal-to-Noise Ratio Reply Krishna Sankar July 24, 2009 at 4:23 am @Ali: As John Reply Krishna Sankar March 25, 2009 at 5:53 am @John: For the simulations in this article, Es/No is same as SNR. Reply Richard Mayo October 8, 2008 at 12:28 pm With a Gray code the data point will move up-down or left-right but never diagonally on the constellation. Can anybody send me please, [email protected] Reply miltung January 30, 2013 at 1:07 pm how about the equation for BER and SER QPSK on AWGN channel ?

The system returned: (22) Invalid argument The remote host or network may be down. b. This is counter-intuitive, as QPSK uses half the bandwidth, and it looks like I'm would always be better off using a QPSK rather than BPSK. Reply Krishna Sankar October 24, 2008 at 6:42 pm @fz: First you need to define a binary sequence of random 1′s and 0′s.

Reply WirelessNewbie October 9, 2009 at 9:57 am Isn't coded means with FEC and uncoded means without FEC Reply Krishna Sankar October 12, 2009 at 5:37 am @WirelessNewbie: Yes. IT-10, pp. 339-350, 1964.[6] Simon, M. Print Symbol Error Rate (SER) for QPSK (4-QAM) modulation by Krishna Sankar on November 6, 2007 Given that we have discussed symbol error rate probability for a 4-PAM modulation, let us Reference [DIG-COMM-BARRY-LEE-MESSERSCHMITT] Digital Communication: Third Edition, by John R.

Could you pls reply, Thanks, Kishore.