TY - JOUR
T1 - Joint Wireless Information and Power Transfer for an Autonomous Multiple Antenna Relay System
AU - Huang, Yang
AU - Clerckx, Bruno
N1 - Funding Information:
The work of Y. Huang was supported by China Scholarship Council (CSC) Imperial Scholarship. The associate editor coordinating the review of this paper and approving it for publication was D. Michalopoulos.
Publisher Copyright:
© 2015 IEEE.
PY - 2015/7/1
Y1 - 2015/7/1
N2 - Considering a three-node multiple antenna relay system, this letter proposes a two-phase amplify-and-forward (AF) relaying protocol, which enables the autonomous relay to simultaneously harvest wireless power from the source information signal and from an energy signal conveyed by the destination. We first study this energy-flow-assisted (EFA) relaying in a single-input single-output (SISO) relay system and aim at maximizing the rate. By transforming the optimization problem into an equivalent convex form, a global optimum can be found. We then extend the protocol to a multiple antenna relay system. The relay processing matrix is optimized to maximize the rate. The optimization problem can be efficiently solved by eigenvalue decomposition, after linear algebra manipulation. It is observed that the benefits of the energy flow are interestingly shown only in the multiple antenna case, and it is revealed that the received information signal and the energy leakage at the relay can be nearly separated by making use of the signal space, such that the desired signal can be amplified with a larger coefficient.
AB - Considering a three-node multiple antenna relay system, this letter proposes a two-phase amplify-and-forward (AF) relaying protocol, which enables the autonomous relay to simultaneously harvest wireless power from the source information signal and from an energy signal conveyed by the destination. We first study this energy-flow-assisted (EFA) relaying in a single-input single-output (SISO) relay system and aim at maximizing the rate. By transforming the optimization problem into an equivalent convex form, a global optimum can be found. We then extend the protocol to a multiple antenna relay system. The relay processing matrix is optimized to maximize the rate. The optimization problem can be efficiently solved by eigenvalue decomposition, after linear algebra manipulation. It is observed that the benefits of the energy flow are interestingly shown only in the multiple antenna case, and it is revealed that the received information signal and the energy leakage at the relay can be nearly separated by making use of the signal space, such that the desired signal can be amplified with a larger coefficient.
KW - Energy harvesting
KW - amplify-and-forward (AF)
KW - multiple antenna relay
KW - relay network
UR - http://www.scopus.com/inward/record.url?scp=84959545909&partnerID=8YFLogxK
U2 - 10.1109/LCOMM.2015.2428252
DO - 10.1109/LCOMM.2015.2428252
M3 - Article
AN - SCOPUS:84959545909
SN - 1089-7798
VL - 19
SP - 1113
EP - 1116
JO - IEEE Communications Letters
JF - IEEE Communications Letters
IS - 7
M1 - 7098350
ER -