TY  - JOUR
KW  - Interference
KW  -  Array signal processing
KW  -  Resource management
KW  -  Receivers
KW  -  Optimization
KW  -  Wireless communication
KW  -  Quality of service
ID  - discovery10056448
N2  - In this paper, a fundamental study of energy efficiency (EE) optimization for coordinated multi-point (CoMP)- simultaneous wireless information and power transfer (SWIPT) heterogeneous networks (HetNets) is provided. We aim to optimize the EE whilst satisfying certain quality-of-service (QoS) requirements in regard to transmission rate and energy harvesting at both the macro-cell and small-cells. The corresponding joint beamforming and power allocation in the presence of intra- and inter-cell interference constitutes a EE maximization problem that is non-convex, and hence very challenging to solve. In order to solve this problem, we propose to separate the beamforming design and power allocation processes. First, we adopt linear zero-forcing (ZF) beamforming to suppress the multi-user interference from both the energy harvesting users (EH-UEs) as well as the information decoding users (ID-UEs), thus transforming the HetNet under consideration to a virtual point-to-point system. An efficient power allocation algorithm is then developed to maximize the corresponding EE. On the other hand, the ZF strategy does not utilize the notion that interference benefits the EH-UEs. As a result, we propose a partial zeroforcing (PZF) approach by differentiating the EH-UEs and IDUEs in order to further improve the EE. Our findings show that the EE can be significantly improved through the integration of CoMP-SWIPT in HetNets.
EP  - 6383
AV  - public
Y1  - 2018/12//
TI  - Energy Efficiency Optimization for CoMP-SWIPT Heterogeneous Networks
A1  - Tang, J
A1  - Shojaeifard, A
A1  - So, DKC
A1  - Wong, KK
A1  - Zhao, N
JF  - IEEE Transactions on Communications
SN  - 0090-6778
UR  - https://doi.org/10.1109/TCOMM.2018.2866852
N1  - This version is the author accepted manuscript. For information on re-use, please refer to the publisher?s terms and conditions.
IS  - 12
VL  - 66
SP  - 6368
ER  -