Title :
Cooperative transmission scheme in MIMO relay broadcast channels
Author :
Zhou, Zhendong ; Wu, Leilei ; Hardjawana, Wibowo ; Vucetic, Branka
Author_Institution :
Sch. of Electr. & Inf. Eng., Univ. of Sydney, Sydney, NSW
Abstract :
We consider relay broadcast channels (RBCs) with multiple antennas at all nodes. A practical precoding, relaying and combining scheme is proposed. Under an overall power constraint, we derive the optimal power allocation solution in a closed form. The conditions for an effective RBC scheme are identified with a qualitative analysis to the relationship between the relay gain and the relative strengths of the direct and relay links. Simulation results are shown for various channel configurations, which verify the analysis and conclude that the first hop in the relay chain is a determining factor to the overall performance of the RBC.
Keywords :
MIMO communication; broadcast channels; precoding; radio links; MIMO relay broadcast channels; combining scheme; cooperative transmission scheme; direct link; multiple antennas; optimal power allocation; overall power constraint; precoding scheme; qualitative analysis; relay gain; relay link; relaying scheme; Analytical models; Broadcasting; Fading; MIMO; Peer to peer computing; Performance analysis; Power system relaying; Receiving antennas; Relays; Transmitting antennas;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2008. PIMRC 2008. IEEE 19th International Symposium on
Conference_Location :
Cannes
Print_ISBN :
978-1-4244-2643-0
Electronic_ISBN :
978-1-4244-2644-7
DOI :
10.1109/PIMRC.2008.4699760
