
94 Green Relay Techniques in Cellular Systems
gain, etc., are absorbed for ease of notation), x
s,j
is the transmitted signal
from sector j, z
r
is the additive Gaussian thermal noise at RN, Ω is the set of
all interfering sectors, and superscript stands for phase. Here the second term
actually represents the summation of two parts: the intra-cell interference
from other sectors within the same BS and inter-cell interferences from the
sectors of other BSs. They can be treated in the same way. It should be noted
that we do not take RNs in other sectors as interfering nodes because their
transmission power is very low compared to the BSs and the interference ...