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Recent content by Romance42932

  1. R

    cyclic prefix matlab code

    x = [1 2 3 4]; h = [1 2]; cp = x(4); % as length(h) = 2 x_with_cp = [x(4) x]; % cp addition y = conv(x,h); y_witout_cp = y(2:5);
  2. R

    matlab code for mmse channel estimation

    can somebody help me with matlab code for mmse channel estimation for ofdm .... i need that code very much thanks in advance
  3. R

    [SOLVED] variance in time domain domain

    hi zorro.. thanks for replying..... actually i am doing LS and MMSE estimation for OFDM in matlab ... i wanna to plot MSE vs SNR plot..., after adding CP and then IDFT , i have to pass signal thru a channel... i have defined channel impulse response as h = (pdp*randn(5,1)) where pdp = exp(-n/5)...
  4. R

    [SOLVED] variance in time domain domain

    hi... i have calculated variance for a paricular SNR say 20dB for awgn noise ... so this variance will be in frequency domain....can anybody tell me how to find the equivalent time domain varaince so that i can find noise in time domain ...thanks in advance
  5. R

    channel estimation by using wiener filter....

    hi... i need matlab code for channel estimation for ofdm using wiener filter.... or atleast suggest me some realy good materials with each mathematical steps so that i can make the code.....i will appreciate if somebody help with code THANKS IN ADVANCE :smile::smile::smile::smile::smile:
  6. R

    [SOLVED] LS and MMSE channel estimation for ofdm

    hi... i want to pass tx (QPSK) signal thru a awgn channel.... let say i have provided snr of 30dB and channel pdp with L=4(tap length) is exp(-n/5) where n is from(0 to 4)... so i want to create channel with say length 5 with noise which satisfies given snr in time domain.... so that y = hx + n...
  7. R

    what is value of pilots in ofdm /sc-fdma

    you can choose ±1...
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