  This paper considers the sum rate maximization problem of a two-user
multiple-input single-output interference channel with receivers that can
scavenge energy from the radio signals transmitted by the transmitters. We
first study the optimal transmission strategy for an ideal scenario where the
two receivers can simultaneously decode the information signal and harvest
energy. Then, considering the limitations of the current circuit technology, we
propose two practical schemes based on TDMA, where, at each time slot, the
receiver either operates in the energy harvesting mode or in the information
detection mode. Optimal transmission strategies for the two practical schemes
are respectively investigated. Simulation results show that the three schemes
exhibit interesting tradeoff between achievable sum rate and energy harvesting
requirement, and do not dominate each other in terms of maximum achievable sum
rate.
