COLLABORATIVE BEAMFORMING-BASED WIRELESS POWER TRANSFER CONSIDERING INTERFERENCE SUPPRESSION

  • Nguyen Ngoc An
  • Hoang Van Dao
  • Nguyen Truong Hieu
  • Nguyen Van Cuong
  • Kieu Xuan Thuc
  • Hoang Manh Kha
  • Tong Van Luyen
Keywords: Wireless power transfer, collaborative beamforming, node selection, interference suppression.

Abstract

The goal of the energy-efficient data communication technique known as collaborative
beamforming (CB) is to extend the network's transmission range by radiating the power of a cluster
of sensor nodes in the direction of the desired base stations or access points (BSs/APs). The main lobe
of the CB sample beampattern is independent of the particular node positions; however, the CB
average pattern exhibits a deterministic characteristic. The sample beam pattern produced by the CB
for a cluster of finitely many collaborative nodes, on the other hand, exhibits sidelobes that are highly
dependent on the particular node positions. This paper demonstrates a simple sidelobe control or
interference suppression approach that is appropriate for CB in wireless sensor networks. This
approach aims to reduce interferences at unwanted BSs/APs while maintaining the main lobe
steering the desired BSs/APs. The proposed approach’s performance is evaluated in terms of
interference suppression ability and the average number of search trials required to select
collaborative nodes. Simulation results show that when node selection is employed with CB,
interferences can be significantly reduced, and they also agree closely with theoretical results.

điểm /   đánh giá
Published
2023-04-28
Section
RESEARCH AND DEVELOPMENT