An improved interference mitigation scheme based on interference subspace alignment

This paper proposes an improved interference subspace alignment scheme for the K-user interference channels, which combines the conventional interference subspace alignment algorithm and the power allocation algorithm between data streams. More specifically, in the proposed scheme a power allocation scheme is developed to mitigate the leftover interference from the conventional interference subspace alignment algorithm, achieving a performance improvement in terms of sum rate. The advantage of the proposed scheme is confirmed by computer simulation results.