A Pre-log Region for the Non-coherent MIMO Two-Way Relaying Channel

Utkovski, Zoran and Eftimov, Tome (2013) A Pre-log Region for the Non-coherent MIMO Two-Way Relaying Channel. In: Proc. 21-st European Signal Processing Conference, EUSIPCO 2013, 09-13 Sept 2013, Marrakesh.


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We study the two-user MIMO block fading two-way relay channel in the non-coherent setting, where neither the terminals nor the relay have knowledge of the channel realizations. We analyze the achievable sum-rate when the users employ independent, isotropically distributed, unitary input signals, with amplify-and-forward (AF) strategy at the relay node. As a byproduct, we present an achievable pre-log region of the AF scheme, defined as the limiting ratio of the rate region to the logarithm of the signal-to-noise ratio (SNR) as the SNR tends to infinity. We compare the performance with time-division-multiple-access (TDMA) schemes, both coherent and non-coherent. The analysis is supported by a geometric interpretation, based on the paradigm of subspace-based communication.

Item Type: Conference or Workshop Item (Paper)
Subjects: Engineering and Technology > Electrical engineering, electronic engineering, information engineering
Divisions: Faculty of Computer Science
Depositing User: Zoran Utkovski
Date Deposited: 19 Mar 2014 08:42
Last Modified: 19 Mar 2014 08:42
URI: http://eprints.ugd.edu.mk/id/eprint/9468

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