A pre-log region for the non-coherent MIMO two-way relaying channel

Author

Utkovski, Zoran ; Eftimov, Tome

Author_Institution

Fac. of Comput. Sci., Univ. Goce Delcev Stip, Stip, Macedonia

fYear

2013

fDate

9-13 Sept. 2013

Firstpage

1

Lastpage

5

Abstract

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.

Keywords

MIMO communication; amplify and forward communication; channel capacity; fading channels; relay networks (telecommunication); time division multiple access; AF scheme; SNR; TDMA schemes; achievable pre-log region; achievable sum-rate; amplify-and-forward strategy; channel realizations; geometric interpretation; limiting ratio; noncoherent setting; rate region; relay node; signal-to-noise ratio; subspace-based communication; time-division-multiple-access schemes; two-user MIMO block fading two-way relay channel; unitary input signals; Fading; MIMO; Protocols; Receiving antennas; Relays; Signal to noise ratio; Time division multiple access;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing Conference (EUSIPCO), 2013 Proceedings of the 21st European

Conference_Location

Marrakech

Type

conf

Filename

6811733