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http://dx.doi.org/10.7840/KICS.2011.36A.5.457

Orthogonal Reference Vectors Selection Method of Subspace Interference Alignment  

Seo, Jong-Pil (인하대학교 전자공학과 우선이동통신 연구실)
Kim, Hyun-Soo (인하대학교 전자공학과 우선이동통신 연구실)
Ahn, Jae-Jin (인하대학교 전자공학과 우선이동통신 연구실)
Chung, Jae-Hak (인하대학교 전자공학과 우선이동통신 연구실)
Abstract
This paper proposes theorthogonal reference vectors selection method of the subspace interference alignment. The proposed method selects multiple orthogonal reference vectors instead of using one reference vector for all users at the same time. The proposed scheme selects a reference vector which maximizes a sum-rate for a certain cell, generates orthogonal vectors to the previous selected vector and selects the one of orthogonal vectors whose sum rate is maximized for each cell. Larger channel gain and sum-rate than the previous method can be obtained by selection degree of freedom. The computer simulation demonstrates the proposed method gives higher sum-rate compared with that of the previous reference vector selection method.
Keywords
Subspace Interference Alignment; Inter-cell Interference Management; Orthogonalization;
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