Title :
Two effective unicast modes in MIMO multi-relay systems
Author :
Wei, Meiying ; Hu, Chunjing ; Long, Hang ; Zheng, Kan ; Wang, Wenbo
Author_Institution :
Wireless Signal Process. & Network Lab., Minist. of Educ. Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
In MIMO multi-relay systems, close-loop precoding at relay nodes is not necessary if unicast modes are carried out. However, in unicast modes, the inter-stream interference at relay nodes may degrade the system capacity. In this paper, two unicast modes are proposed to reduce the negative impact of the residual interference. The first one suppresses the interference by applying orthogonal precoding at the source node and the second one suppresses the residual interference through receiving filters at relay nodes. Analysis of the system capacity performance are given and simulation results will demonstrate the superiority of proposed modes.
Keywords :
MIMO communication; channel capacity; interference suppression; precoding; MIMO multi-relay systems; close-loop precoding; inter-stream interference; interference suppression; receiving filters; relay nodes; system capacity; unicast modes; Base stations; Broadcasting; Degradation; Diversity methods; Filters; Interference suppression; MIMO; Relays; Signal processing; Unicast;
Conference_Titel :
Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, 2009 3rd IEEE International Symposium on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-4076-4
DOI :
10.1109/MAPE.2009.5355945
