3 problems

Maximum-efficiency conjecture. The maximum efficiency is $d_{\max}=1.4998$, achieved when there are $K=3$ users using $N=2{,}001$ subcarriers.

Consider a 3-user $(p,p+1)$ MIMO interference channel with constant channel coefficients, where each transmitter has $p$ antennas and each receiver has $p+1$ antennas. The degrees…

Consider a $3K$-user interference channel with $K otinmathbb{Z}^+$? No: let $Kinmathbb{Z}^+$, and partition the transmitter–receiver pairs into groups $G1,G2,\ldots,GK$, each contai…