Short packet communication in underlay cognitive network assisted by an intelligent reflecting surface

Abstract

We propose short packet communication in an underlay cognitive radio network assisted by an intelligent reflecting surface (IRS) composed of multiple reconfigurable reflectors. This scheme, called the IRS protocol, operates in only one time slot (TS) using the IRS. The IRS adjusts its phases to give zero received cumulative phase at the secondary destination, thereby enhancing the end‐to‐end signal‐to‐noise ratio. The transmitting power of the secondary source is optimized to simultaneously satisfy the multi‐interference constraints, hardware limitations, and performance improvement. Simulation and analysis results of the average block error rates (BLERs) show that the performance can be enhanced by installing more reconfigurable reflectors, increasing the blocklength, lowering the number of required primary receivers, or sending fewer information bits. Moreover, the proposed IRS protocol always outperforms underlay relaying protocols using two TSs for data transmission, and achieves the best average BLER at identical transmission distances between the secondary source and secondary destination. The theoretical analyses are confirmed by Monte Carlo simulations.

Physical Layer Security Performance Analysis of IRS-Aided Cognitive Radio Networks

“…Reference [28] considered imperfect CSI in IRS-aided CRN, and analyzed safety performance. Study [29] analyzed the average block error rates (BLERs) performance for multiple IRS-aided CRN short-packet communication systems.…”

“…Then, slack variables are introduced into the SINR constraint of the SR in (29) and Eve in (30), which can be rewritten as the following, respectively:…”

Performance Evaluation of Short-Packet Communications of Single-Hop System with Presence of Co-Channel Interference

“…The authors of [10] provided a deep-learning framework for predicting the BLERs for Internet of Things system. In [11], SPC was investigated in a cognitive radio network helped by an intelligent reflecting surface. However, these above works did not consider co-channel interference in the system.…”