Semi-Blind Receiver for Two-Hop MIMO Relaying Systems via Selective Kronecker Product Modeling

In this paper we propose a new iterative semi-blind receiver for two-hop MIMO relaying systems using a tensor-based approach. We consider that both the source and the relay use a Khatri-Rao space time code for data transmission. We introduce a Selective Kronecker Product (SKP) modeling that allows to recast the received signal at the destination as a Tucker 3 model with a sparse core. The proposed SKP modeling eliminates the need of the source-destination (SD) link to initialize the receiver, as opposed to the receiver proposed in [1]. Our simulations show that our SKP-ALS receiver achieves a better performance than its state-of-the-art in the literature, that uses an additional SD link, with a lower computational complexity.

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