Electrical engineering

Physics

Channel (broadcasting)

Topology (electrical circuits)

Asymptotic analysis

Mathematics

Wireless

Noise (video)

Image (mathematics)

Cognitive radio

Engineering

Mathematical analysis

Signal-to-noise ratio (imaging)

Artificial intelligence

Power (physics)

Programming language

Electronic engineering

Interference (communication)

Computer science

Transmitter

Quantum mechanics

Scheme (mathematics)

Expression (computer science)

Signal-to-interference-plus-noise ratio

Co-channel interference

Signal-to-interference ratio

Telecommunications

IEEE Wireless Communications Letters

In this letter, considering the reconfigurable intelligent surface’ (RIS’) service coverage limitation, we investigate the outage probability (OP) of an RIS-aided cognitive radio network where the RIS is used only to eliminate the interference from the secondary transmitter to the primary receiver. Specifically, a closed-form expression for the OP is derived and the asymptotic OP is obtained at high signal-to-noise ratio (SNR). We also present the asymptotic OP when the number of reflecting elements is large. Simulation results validate our analysis, and show that at low tolerable interference-to-noise ratio (INR), the considered scheme can achieve significant performance gains over the coverage-neglected scheme and the signal enhancement scheme.

Outage Performance of Cognitive Radio Networks With a Coverage-Limited RIS for Interference Elimination