Non-coherent two-way relaying with amplify-and-forward

Utkovski, Zoran and Eftimov, Tome (2013) Non-coherent two-way relaying with amplify-and-forward. In: 7-th COST IC 1004 Scientific Meeting, 28-31 May 2013, Ilmenau, Germany.


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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 transmit or receive knowledge of the channel realizations. We present a lower bound on the achievable sum-rate with amplify-and-forward (AF) 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. Additionally, we present a comparison a with time-division-multiple-access (TDMA) scheme, both in the coherent and non-coherent setup. 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 12:03
Last Modified: 19 Mar 2014 12:03

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