“…Further, directional antennas can reduce the line-of-sight (LOS) components of SI as well [7]. As reported in many papers, e.g., [4][5][6][7][8][9][10][20][21][22][23][24][25][26][27], we model the RSI channel of every relay node as a Rayleigh fading channel. Let the channel gain between relay nodes F i and F j be h i,j , i, j {0, 1, ....N + 1}, and let h j,j be the channel coefficient of the RSI channel at the relay node F j , j = {1, 2, ....N}.…”