Interference Alignment with Rate Splitting in a Three-user Interference Channel with a Cognitive Transmitter

This paper proposes a new strategy combining Interference Alignment (IA) and rate splitting for a three user interference channel with a cognitive transmitter. Although a half of available dimensions are sacrificed to align interference signals from other users in conventional IA, the proposed scheme recycles the sacrificed dimensions with the help of a cognitive transmitter. The achievable rate region and generalized degrees of freedom are derived. Compared with conventional IA, the proposed scheme improves achievable rate and generalized degrees of freedom.

Provided by: Institute of Electrical and Electronics Engineers Topic: Mobility Date Added: Nov 2012 Format: PDF

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