Abstract:

A new combinational technology is proposed, which is feasible to apply physical-layer network coding (PNC) to wireless fading channels by employing the harmful interference strategically. The key step of PNC is that sources broadcast signals simultaneously without orthogonal scheduling. Naturally, the signals overlap in the free space at the receivers. Since the signals from different sources are mutual independent, rooted on this rational assumption, an enhanced joint diagonalization separation named altering row diagonalization (ARD) algorithm is exploited to separate these signals by maximizing the cost function measuring independence among them. This ARD PNC (APNC) methodology provides an innovative way to implement signal-level network coding at the presence of interference and without any priori information about channels in fading environments. In conclusions, the proposed APNC performs well with higher bandwidth utility and lower error rate.