Title :
Ordered Tomlinson-Harashima precoding in multiuser MIMO relay system
Author :
Zhou, Enzhi ; Hao, Li
Author_Institution :
Southwest Jiaotong Univ., Chengdu, China
Abstract :
In this paper, we discuss a multiuser multiple-input multiple-output (MIMO) relay system with direct link based on ordered Tomlinson-Harashima precoding (THP). THP with fairness-guaranteed power loading is applied with both zero-forcing (ZF) and minimum mean square error (MMSE) criteria. The direct and relay links are combined to obtain the diversity gain. The maximum ratio combining (MRC) weights are derived. Applying the modified V-BLAST ordering algorithm to choose the best order of interference pre-elimination, the proposed scheme can improve the average bit error ratio (BER) performance.
Keywords :
MIMO communication; diversity reception; error statistics; interference suppression; least mean squares methods; multiuser channels; precoding; radio links; Tomlinson-Harashima precoding; V-blast ordering algorithm; bit error ratio; diversity gain; interference pre-elimination; maximum ratio combining; minimum mean square error; multiple input multiple output; multiuser MIMO relay system; ordered THP; relay links; zero forcing criteria; Bit error rate; Diversity reception; Loading; MIMO; Relays; Signal to noise ratio; MIMO; THP; precoding; relay;
Conference_Titel :
Signal Design and its Applications in Communications (IWSDA), 2011 Fifth International Workshop on
Conference_Location :
Guilin
Print_ISBN :
978-1-61284-047-5
DOI :
10.1109/IWSDA.2011.6159420
