TY - GEN
T1 - A transmit-power efficient MIMO-THP design
AU - Masouros, Christos
AU - Sellathurai, Mathini
AU - Ratnarajah, Tharm
PY - 2012/8/27
Y1 - 2012/8/27
N2 - In this paper, an improved multiple input multiple output Tomlinson-Harashima precoder (MIMO-THP) is introduced, where the transmit power loss is reduced based on optimizing the interference to be canceled. The concept behind the proposed technique builds on the fact that both the desired and interfering signals originate from the base station (BS) of the downlink system itself. Based on this observation, the proposed method influences the resulting interference, to reduce the transmission power required to cancel it, without altering the information content of the downlink message. The aim is to bring the interference closer to the replicas of the desired symbols for all users in the THP modulo-extended constellation. In this way, the power required to pre-subtract interference is decreased. Theoretical and simulation results both confirm that, by optimizing the interference to be canceled, the proposed technique offers a considerable transmit power reduction compared to conventional THP while securing an equal error rate performance.
AB - In this paper, an improved multiple input multiple output Tomlinson-Harashima precoder (MIMO-THP) is introduced, where the transmit power loss is reduced based on optimizing the interference to be canceled. The concept behind the proposed technique builds on the fact that both the desired and interfering signals originate from the base station (BS) of the downlink system itself. Based on this observation, the proposed method influences the resulting interference, to reduce the transmission power required to cancel it, without altering the information content of the downlink message. The aim is to bring the interference closer to the replicas of the desired symbols for all users in the THP modulo-extended constellation. In this way, the power required to pre-subtract interference is decreased. Theoretical and simulation results both confirm that, by optimizing the interference to be canceled, the proposed technique offers a considerable transmit power reduction compared to conventional THP while securing an equal error rate performance.
KW - known interference
KW - multi-user MIMO
KW - non-linear precoding
KW - power loss
KW - Tomlinson-Harashima precoding
UR - http://www.scopus.com/inward/record.url?scp=84867493152&partnerID=8YFLogxK
U2 - 10.1109/ISIT.2012.6283923
DO - 10.1109/ISIT.2012.6283923
M3 - Conference contribution
AN - SCOPUS:84867493152
SN - 9781467325806
T3 - IEEE International Symposium on Information Theory
SP - 2301
EP - 2305
BT - 2012 IEEE International Symposium on Information Theory Proceedings
PB - IEEE
T2 - 2012 IEEE International Symposium on Information Theory
Y2 - 1 July 2012 through 6 July 2012
ER -