Multiuser pairing and resource allocation with interference avoidance for SC-FDMA cellular systems

In this paper, we investigate multiuser pairing and resource allocation with interference avoidance in LTE uplink cellular networks. We first derive the received signal-to-interference-plus-noise ratio (SINR) in spatial multiuser SC-FDMA systems with frequency-domain minimum mean-square error (MMSE) equalization. Based on it, we formulate an optimization multiuser pairing and resource allocation problem to maximize system weighted throughput. With the help of the exchange of high interference indicators among multiple base stations, we develop a distributed joint optimal algorithm and a distributed low-complexity algorithm. Simulation results show that the proposed algorithm with interference avoidance significantly outperforms the algorithm without interference avoidance in [12].