The optimal density of transmitting nodes for multihop AF relaying with
= 5 as a function of distance between source and destination
for different end-to-end spectral efficiency
= 0.5 and 1 bps/Hz and path loss exponent
= 3 and 4 in Rayleigh fading channel with noise variance
= 1, transmission power
= 15 dB, and interference power
= 5 dB.