Title :
A multi-relay-selection scheme with cyclic delay diversity
Author :
Qiang Li ; Qing Yan ; Teh, Kah Chan ; Li, K.H. ; Yongxu Hu
Author_Institution :
Nat. Key Lab. of Sci. & Technol. on Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
In our proposed multi-relay-selection scheme with cyclic delay diversity (CDD), relays with spectral efficiency above a threshold are chosen to forward information, and a distinct cyclic shift is assigned to each selected relay. We derive an approximate expression of the end-to-end mutual information for the proposed scheme. We further analyze the outage probability and diversity-multiplexing tradeoff (DMT) performance. Numerical results show that the proposed scheme can realize full diversity and achieve the same outage probability and DMT performance as that of the selection cooperation scheme without the need for feedback information and strict synchronization among relays.
Keywords :
cooperative communication; diversity reception; error statistics; numerical analysis; CDD; DMT performance; cyclic delay diversity; distinct cyclic shift; diversity-multiplexing tradeoff performance; end-to-end mutual information; multirelay-selection scheme; outage probability; selection cooperation scheme; spectral efficiency; Approximation methods; Decoding; Delay; Mutual information; Relays; Signal to noise ratio; Synchronization; Cyclic delay diversity; diversity-multiplexing tradeoff (DMT); multi-relay selection; outage probability;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2012.121912.122493
