TY - JOUR
T1 - Multi-hop MIMO relay networks
T2 - Diversity-multiplexing trade-off analysis
AU - Gündüz, Deniz
AU - Khojastepour, Mohammad Amir
AU - Goldsmith, Andrea
AU - Poor, H. Vincent
N1 - Funding Information:
Manuscript received June 17, 2009; revised November 18, 2009; accepted March 1, 2010. The associate editor coordinating the review of this paper and approving it for publication was R. Nabar. D. Gündüz is with the Centre Tecnológic de Telecomunicacions de Catalunya (CTTC), Castelldefels, Barcelona, Spain (e-mail: [email protected]). M. A. Khojastepour is with NEC Laboratories America, Inc., Princeton, NJ (e-mail: [email protected]). A. Goldsmith is with the Dept. of Electrical Engineering, Stanford University, Stanford, CA (e-mail: [email protected]). H. V. Poor is with the Dept. of Electrical Engineering, Princeton University, Princeton, NJ (e-mail: [email protected]). The material in this paper was presented in part at the IEEE Global Communications Conference (Globecom), New Orleans, LA, Nov. 2008. This research was supported by the National Science Foundation under Grant CNS-06-25637 and the DARPA ITMANET program under Grant 1105741-1-TFIND. Digital Object Identifier 10.1109/TWC.2010.05.090915
PY - 2010/5
Y1 - 2010/5
N2 - A multi-hop relay network with multiple antenna terminals in a quasi-static slow fading environment is considered. The fundamental diversity-multiplexing gain tradeoff (DMT) is analyzed in the case of half-duplex relay terminals. While decodeand- forward (DF) relaying achieves the optimal DMT in the fullduplex relay scenario, it is shown that the dynamic decode-andforward (DDF) protocol achieves the optimal DMT if the relay is constrained to half-duplex operation. For the latter case, static DF protocols are considered as well, and the corresponding DMT performance is shown to fall short of the optimal performance, which indicates that dynamic channel allocation is required for optimal DMT performance. The optimal DMT is expressed as the solution of a convex optimization problem and explicit DMT expressions are presented for some special cases. In the case of multiple relays, it is shown that the optimal diversity gain, which is achieved by exploiting the available "hop-diversity", is dominated by the neighboring two-hops with the minimum diversity gain.
AB - A multi-hop relay network with multiple antenna terminals in a quasi-static slow fading environment is considered. The fundamental diversity-multiplexing gain tradeoff (DMT) is analyzed in the case of half-duplex relay terminals. While decodeand- forward (DF) relaying achieves the optimal DMT in the fullduplex relay scenario, it is shown that the dynamic decode-andforward (DDF) protocol achieves the optimal DMT if the relay is constrained to half-duplex operation. For the latter case, static DF protocols are considered as well, and the corresponding DMT performance is shown to fall short of the optimal performance, which indicates that dynamic channel allocation is required for optimal DMT performance. The optimal DMT is expressed as the solution of a convex optimization problem and explicit DMT expressions are presented for some special cases. In the case of multiple relays, it is shown that the optimal diversity gain, which is achieved by exploiting the available "hop-diversity", is dominated by the neighboring two-hops with the minimum diversity gain.
KW - Decode-and-forward
KW - Diversity-multiplexing trade-off
KW - Multi-hop
KW - Outage probability
KW - Relay networks
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U2 - 10.1109/TWC.2010.05.090915
DO - 10.1109/TWC.2010.05.090915
M3 - Article
AN - SCOPUS:77952279847
SN - 1536-1276
VL - 9
SP - 1738
EP - 1747
JO - IEEE Transactions on Wireless Communications
JF - IEEE Transactions on Wireless Communications
IS - 5
M1 - 5463228
ER -