Reference : Diversity fairness in tomlinson-harashima precoded multiuser MIMO through retransmission
Scientific journals : Article
Engineering, computing & technology : Electrical & electronics engineering
http://hdl.handle.net/10993/26523
Diversity fairness in tomlinson-harashima precoded multiuser MIMO through retransmission
English
Krikidis, Ioannis mailto [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) >]
Ottersten, Björn mailto [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) >]
2013
IEEE Signal Processing Letters
20
4
375-378
Yes (verified by ORBilu)
International
10709908
[en] Diversity ; MIMO downlink ; THP ; MIMO downlinks ; Outage probability ; Asymptotic analysis ; MIMO systems ; Probability ; Antennas
[en] In this letter, we study the diversity unfairness associated with the conventional Tomlinson-Harashima precoding (THP) in multiuser multiple-input multiple-output downlink transmission. A single-retransmission scheme that combines two THP signals at each user with a complementary multi-user suppression order is investigated. For a system with $M$ antennas at the transmitter and a single antenna at each user, the proposed scheme provides a diversity order $M+1$ for all users and ensures diversity fairness. We study two retransmission policies, where the users either consider only the current received codeword or combine both codewords for decoding. An asymptotic analysis of the outage probability for both THP retransmission schemes is provided. In addition, a power allocation policy that minimizes the outage probability and accommodates the same coding gain at each user is discussed by formulating a geometric optimization problem. © 1994-2012 IEEE.
http://hdl.handle.net/10993/26523
10.1109/LSP.2013.2248362

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