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(Department of Electronics and Control Engineering, Hanbat National University)
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(Department of Electronics and Control Engineering, Hanbat National University)
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(Department of Electronics and Control Engineering, Hanbat National University)
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(Department of Electronics and Control Engineering, Hanbat National University)
Power-line communication (PLC) has influenced smart grid development. In addition, PLC has also been instrumental in current research on internet-of-things (IoT). Due to the implementation of PLC in smart grid and IoT environments, strides have been made in PLC and its combination with the wireless system to form a hybrid communication system. Also, PLC has evolved from a single-input-single-output (SISO) configuration to multiple-input-multiple-output (MIMO) configuration system, and from a point-to-point communication system to cooperative communication systems. In this work, we extend a MIMO wireless two-way amplify-and-forward (AF) cooperative communication system to a hybrid PLC and wireless (PLC/W) system configuration. We then maximize the weighted sum-rate for the hybrid PLC/W by optimizing the precoders at each node within the hybrid PLC/W system. The sum-rate problem was found to be non-convex, therefore, an iterative algorithm is used to find the optimal precoders that locally maximize the system sum-rate. For our simulation results, we compare our proposed hybrid PLC/W configuration to a PLC only and wireless only configuration at each node. Due to an improvement in system diversity, the hybrid PLC/W configuration outperformed the PLC only and wireless only system configurations in all simulation results presented in this paper.
This research was partly supported by the Korea Electric Power Corporation (Grant R17XA05-71), and by the Institute for Information and Communications Technology Promotion (IITP) grant funded by the Korea government (MIST) (No. 2016-0-00500, cross layer design of cryptography and physical layer security for IoT networks).