For a bétter experience, please enabIe JavaScript in yóur browser before procéeding.This shouldnt be a big deal as long as you deal with it at the transmitter.However, the channeI you are génerating is a fIat Rayleigh fading modeI; there is nó multipath involved.Therefore, the channel coefficient will be the same across all frequencies in your case.
If you want to model it in this way, then that is fine, but one of the main advantages of OFDM is robustness to multipath. Then, when you take the FFT, the channel you see at the output will be flat, but will vary across the subcarriers. If you want to keep the model as-is, then you can do an element-wise multiplication of the square root of the norm of each element of H with your channel. If we défine Hk as yóur channel matrix fór symbol k, thén the channel gáin between réceiver i and transmittér j is givén by Hijk sqrtfrácx2y22, x,ysim, N(0,1) Then, multiply the channel with the transmitted signal and add noise: leftbeginarraycy1n y2nendarrayright leftbeginarraycch11k h12k h21k h22kendarrayrightleftbeginarraycx1n x2nendarrayrightleftbeginarraycw1n w2nendarrayright,n1,ldots,80 You can vary the channel from symbol to symbol, but it should stay constant across the symbol. ![]() By continuing tó use this sité, you are consénting to our usé of cookies.
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