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Recent content by joserse46

  1. J

    Pure Aloha Question on the maximum normalized throughtput

    I went through deriving the max value for normailized throughput (rho = G*exp(-2*G)) which is 1/(2*e) this occurs when G = .5 the question is, can this be achieved in practice? I don't see any reason why not, but not certain. Thanks for your time
  2. J

    [SOLVED] Please find my simple error in syndrome function in matlab

    It will only return the syndrome and not k(error in kth position) I wrote a test function to return two values and it work, but for some reason it's not returning the 2 values I want. thanks in advance. example msg r1 = [1 0 1 1 1 0 1 0 1 0 0 0 1 0 1] should return s = [0 1 0 1] (which it...
  3. J

    8 QAM symbol error and bit error

    Hello, so I am simulating 8 QAM in matlab and have some questions about symbol error probability as my results are not making sense. d1, d2, d3 are bits(vectors) sent d1hat, d2hat, d3hat are the received (over AWGN channel) n is the number of symbols N=n*3 is the number of bits sent C1 =...
  4. J

    Help with QPSK run time in MATLAB

    Thank you sir, greatly appreciated!
  5. J

    Help with QPSK run time in MATLAB

    So I have improved most of this code except I am stuck on the correlation block I want the rows an N by 4 matrix to be the product(element by element) of another N by 4 matrix and a matrix s = [ .5 .5 .5. .5] for example A = [ 2 4 6 8; 8 6 4 2; 10 12 14 16; 20 10 8 2] s = [.5...
  6. J

    Help with QPSK run time in MATLAB

    Thanks for your time, could you elaborate on using complex variables instead of I Q components? I plan to implement more matrices soon, i figured that is what is killing the time. Thanks again for your help
  7. J

    Help with QPSK run time in MATLAB

    Hello I just completed a assignment for QPSK in MATLAB, it works fine, but wanted to see if I could get some help on run time as it takes a while to execute the m file. Any pointers would be appreciated. I am only simulating the baseband part. Thanks in advance for any suggestions! In the...

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