TY - JOUR
T1 - Full-Duplex Regenerative Relaying and Energy-Efficiency Optimization over Generalized Asymmetric Fading Channels
AU - Sofotasios, Paschalis C.
AU - Fikadu, Mulugeta K.
AU - Muhaidat, Sami
AU - Cui, Qimei
AU - Karagiannidis, George K.
AU - Valkama, Mikko
N1 - Funding Information:
Manuscript received April 21, 2016; revised September 15, 2016 and January 10, 2017; accepted February 13, 2017. Date of publication March 17, 2017; date of current version May 8, 2017. This work was supported by the Academy of Finland under Project 284694 and Project 288670. The work was also supported by the NSFC Program for International Cooperation, number 61461136002. Limited subset of early stage results were presented at IEEE Globecom, December 2015 [1] and at IEEE WiMob, October 2015 [2]. The associate editor coordinating the review of this paper and approving it for publication was S. Buzzi.
Publisher Copyright:
© 2002-2012 IEEE.
PY - 2017/5
Y1 - 2017/5
N2 - This paper is devoted to the end-to-end performance analysis, optimal power allocation (OPA), and energy-efficiency (EE) optimization of decode-and-forward (DF)-based full-duplex relaying (FDR) and half-duplex relaying (HDR) systems. Unlike existing analyses and works that assume simplified transmission over symmetric fading channels, we consider the more realistic case of asymmetric multipath fading and shadowing conditions. To this end, exact and asymptotic analytic expressions are first derived for the end-to-end outage probabilities (OPs) of the considered DF-FDR set ups. Based on these expressions, we then formulate the OPA and EE optimization problems under given end-to-end target OP and maximum total transmit power constraints. It is shown that OP in FDR systems is highly dependent upon the different fading parameters and that OPA provides substantial performance gains, particularly, when the relay self-interference (SI) level is strong. Finally, the FDR is shown to be more energy-efficient than its HDR counterpart, as energy savings beyond 50% are feasible even for moderate values of the SI levels, especially at larger link distances, under given total transmit power constraints and OP requirements.
AB - This paper is devoted to the end-to-end performance analysis, optimal power allocation (OPA), and energy-efficiency (EE) optimization of decode-and-forward (DF)-based full-duplex relaying (FDR) and half-duplex relaying (HDR) systems. Unlike existing analyses and works that assume simplified transmission over symmetric fading channels, we consider the more realistic case of asymmetric multipath fading and shadowing conditions. To this end, exact and asymptotic analytic expressions are first derived for the end-to-end outage probabilities (OPs) of the considered DF-FDR set ups. Based on these expressions, we then formulate the OPA and EE optimization problems under given end-to-end target OP and maximum total transmit power constraints. It is shown that OP in FDR systems is highly dependent upon the different fading parameters and that OPA provides substantial performance gains, particularly, when the relay self-interference (SI) level is strong. Finally, the FDR is shown to be more energy-efficient than its HDR counterpart, as energy savings beyond 50% are feasible even for moderate values of the SI levels, especially at larger link distances, under given total transmit power constraints and OP requirements.
KW - energy efficiency
KW - fading channels
KW - Full-duplex relaying
KW - outage probability
KW - power allocation
UR - http://www.scopus.com/inward/record.url?scp=85028710156&partnerID=8YFLogxK
U2 - 10.1109/TWC.2017.2677900
DO - 10.1109/TWC.2017.2677900
M3 - Article
AN - SCOPUS:85028710156
SN - 1536-1276
VL - 16
SP - 3232
EP - 3251
JO - IEEE Transactions on Wireless Communications
JF - IEEE Transactions on Wireless Communications
IS - 5
M1 - 7880704
ER -
