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Recent content by Usiddique

  1. U

    BER problem while transmitting 64 OFDM symbols

    Hi, I am trying to implement OFDM system using 64 point FFT and the following equation. I am trying to transmit 64 OFDM symbols, each containing 64 qpsk symbols. Y = HS + W; where, Y = 64x64 matrix of received signal H = 64 x 64 matrix of channel coefficient W = 64x64 matrix of noise I...
  2. U

    why BER is increasing with increasing SNR values?

    Hi Chaker, Thank you very much. I am trying to debug the code if i couldnot I do post.. Regards, usman
  3. U

    why BER is increasing with increasing SNR values?

    Hi, I have implemented very basic OFDM system to calculate BER. But BER is increasing as SNR increases. Anyone can highlight the reason please??
  4. U

    Help to define a channel for OFDM based system

    Hi , I am implementing very basic OFDM system with the following assumptions:- FFT size=64 channel with 3 paths i.e h = [1 1 1] I want to implement an equation :- r = H(F.^H)s + v , where r is received signal after removing Cyclic Prefix N is a set of symbols to be converted from serial...

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