Title :
Joint maximum likelihood detection and power allocation in cooperative MIMO relay systems
Author :
Hesketh, Thomas ; Clarke, Patrick ; De Lamare, Rodrigo C. ; Wales, Stephen
Author_Institution :
Dept. of Electron., Univ. of York, York, UK
Abstract :
In this paper, cross-layer design methods are proposed for jointly detecting data streams and dynamically allocating power within a multiple-input multiple-output two-phase cooperative wireless communication system operating in a spatial multiplexing configuration and with single and multiple decode-and-forward (DF) relays. The proposed joint detection and power allocation schemes employ a maximum likelihood rule, which gives rise to an efficient cooperative sphere detector and algorithms to adjust the power levels of all links in an alternating strategy. Simulation results show Bit Error Rate (BER) comparisons between the system with no cooperation, equally distributed power allocation with cooperation, and the proposed power allocation scheme for single and multiple relay systems for different conditions and scenarios.
Keywords :
MIMO communication; cooperative communication; decode and forward communication; maximum likelihood detection; radiocommunication; BER; bit error rate; cooperative MIMO relay systems; cooperative sphere detector; data streams detection; decode-and-forward relays; distributed power allocation; maximum likelihood detection; multiple-input multiple-output two-phase cooperative wireless communication system; spatial multiplexing; Bit error rate; Detectors; MIMO; Relays; Resource management; Signal to noise ratio; Vectors; Cooperative relay system; MIMO; maximum likelihood detection; power allocation; stochastic gradient techniques;
Conference_Titel :
Smart Antennas (WSA), 2012 International ITG Workshop on
Conference_Location :
Dresden
Print_ISBN :
978-1-4577-1923-3
Electronic_ISBN :
978-1-4577-1924-0
DOI :
10.1109/WSA.2012.6181228