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- Title
Performance enhancement scheme for IRS-assisted cognitive backscatter communication network.
- Authors
LYU Bin; CAO Yi; LI Jian; QI Ting
- Abstract
In order to achieve the self-sustainable cognitive radio network (CRN) and improve its communication efficiency, an efficient multi-mode switching scheme assisted by the intelligent reflecting surface (IRS) for the overlay scenario was proposed. In particular, the secondary transmitter (ST) could work in either backscatter communication (Back- Com) mode or harvest-then-transmit (HTT) mode. The IRS was exploited to enhance the energy harvesting, information backscattering, and information transmission efficiencies at the ST. To maximize the system sum-rate, an optimization problem about the phase shirts at the IRS, time scheduling, and power allocation was formulated. Since the formulated problem was non-convex, an efficient block coordinate descent (BCD) based algorithm was proposed to achieve the sub-optimal solution. Simulation results confirm that the proposed scheme can achieve up to 200% sum-rate gain over the benchmark schemes.
- Publication
Journal on Communication / Tongxin Xuebao, 2022, Vol 42, Issue 12, p172
- ISSN
1000-436X
- Publication type
Article
- DOI
10.11959/j.issn.1000-436x.2021233