Below is the equation mentioned in the paper "Comparison of Asymmetrically Clipped Optical OFDM and DC-Biased Optical OFDM in AWGN "I am asking about the value of "k" and how to program it in Matlab code.
Bdc=sqrt (E{xt^2}) .. (3)
We define this as a bias of 10 log10(k^2 + 1) dB
Xdc=Bdc+xt