Robust Joint Signal and Interference Alignment for MIMO Cognitive Radio Network

Provided by: Queens Presbyterian Church
Topic: Mobility
Format: PDF
In this paper, a robust joint signal and interference alignment is designed for cognitive Multiple-Input Multiple-Output (MIMO) interference channel in which single primary link coexists with multiple secondary links. Considering channel imperfections and finite Signal-to-Noise Ratio (SNR) in practice, they propose a worst-case joint design to not only minimize the leakage of interference signals but also ensure the desired signal falling into the orthogonal complement of interference subspace. Under the assumption of the norm-bounded channel uncertainties, the underlying problem is recast to convex form via Semi-Definite Programming (SDP), and the optimum solutions are obtained iteratively.

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