TY - JOUR
T1 - Dual-hop wireless communications with combined gain relays
AU - Tsiftsis, T. A.
AU - Karagiannidis, G. K.
AU - Kotsopoulos, S. A.
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2005/10
Y1 - 2005/10
N2 - A dual-hop relayed wireless communication system is presented where the gain of the relay, called combined gain relay (CGR), is produced after combining the channel state information from both hops, depending on the mean hop's signal-to-noise ratio (SNR). The proposed scheme can be efficiently applied in dual-hop transmissions with unbalanced mean SNRs due to the long-term fading effects produced by the movement of the user in the area served by the wireless network. The overall system performance is studied in Rayleigh fading channels. Closedform expressions are derived for important system performance metrics, such as average end-to-end SNR, average error probability and outage probability. The CGR's average power consumption is investigated which in certain cases is lower compared with existed relays. Numerical results and simulations show an improvement in the end-to-end system performance.
AB - A dual-hop relayed wireless communication system is presented where the gain of the relay, called combined gain relay (CGR), is produced after combining the channel state information from both hops, depending on the mean hop's signal-to-noise ratio (SNR). The proposed scheme can be efficiently applied in dual-hop transmissions with unbalanced mean SNRs due to the long-term fading effects produced by the movement of the user in the area served by the wireless network. The overall system performance is studied in Rayleigh fading channels. Closedform expressions are derived for important system performance metrics, such as average end-to-end SNR, average error probability and outage probability. The CGR's average power consumption is investigated which in certain cases is lower compared with existed relays. Numerical results and simulations show an improvement in the end-to-end system performance.
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U2 - 10.1049/ip-com:20045268
DO - 10.1049/ip-com:20045268
M3 - Article
AN - SCOPUS:27144443686
VL - 152
SP - 528
EP - 532
JO - IEE Proceedings: Communications
JF - IEE Proceedings: Communications
SN - 1350-2425
IS - 5
ER -