You are right, the MAC constraints violate the DCP rules, and will be rejected by CVX.
About @Michal_Adamaszek 's answer in Can CVX solve this kind of function {x-log(1+x/(x+1))} , it’s not the same case because Interference(1) = p(2)*norm(h(2))^2. Therefore, in my case becomes:
log(1+x/(1+y))
which cannot be solved with the way @Michal_Adamaszek has proposed