Information and Energy Beamforming for Two-Tier Heterogeneous Networks with QoS Guarantee

  • 蕭 羽容

Student thesis: Master's Thesis

Abstract

Simultaneous wireless information and power transfer (SWIPT) is an attractive technique to provide wireless data services and energy charging at the same time Conventionally it is applied to one-tier networks such as current cellular and WiFi networks where a central station is deployed to serve a number of users in the coverage As the notion of heterogeneous network becomes emerging it is of paramount importance to investigate effective SWIPT methods in the context of heterogeneous networks In this thesis we consider a two-tier heterogeneous network where the primary tier and the secondary tier are overlaid in the same geographical area To enable SWIPT in such a heterogeneous network we consider the time division multiple access (TDMA) and propose the frame structure To guarantee the service quality in the system we explore the optimal beamforming design based on two optimization formulations including the transmission power minimization subject to the requirement of data throughput and harvested energy and the throughput maximization subject to the available transmission power and the harvested energy target Since both the formulated problems are non-convex in nature we obtain the optimal solution by applying the semidefinite relaxation (SDR) technique We investigate the optimality of the SDR solutions and propose methods to improve the throughput of the secondary tier that may suffer severe co-channel interference from the primary tier Numerical results are provided to evaluate the performance of the proposed optimal beamforming design and compare with some benchmark schemes
Date of Award2016 Aug 31
Original languageEnglish
SupervisorKuang-Hao Liu (Supervisor)

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