Interference alignment with efficient dynamic information selection for LTE-A uplink coordinated multipoint systems

The demand for high data rate and reliable quality of service has increased in nowadays. Multi-user will induce other cells interference which severely degrades the system performance. In this paper, the interference alignment (IA) techniques in uplink (UL) coordinated multipoint (CoMP) system with three different dynamic information selection (DIS) schemes are proposed to enhance the performance of boundary communications. The first scheme is to maximize the sum-rate by selecting optimal information from other base station in a brute force way. The second way is to minimize the number of outage of the communicated link in the MIMO interference channel. The third scheme which maximizes the minimum signal to interference-plus-noise ratio (Max-Min SINR) is proposed take both sum-rate and outage probability into consideration. Simulation results show that the proposed algorithms can increase the sum-rate and reduce the outage probability compared to the conventional UL CoMP system.