Full Duplex Wireless Communications for Cognitive Radio Networks
Wenchi Cheng, Xi Zhang, Hailin Zhang

TL;DR
This paper introduces a full duplex wireless communication scheme for cognitive radio networks that enables secondary users to detect primary users while transmitting, significantly reducing primary user packet loss compared to traditional half duplex systems.
Contribution
The paper proposes a novel full duplex scheme with specific interference cancellation techniques, allowing secondary users to detect primary users during transmission, which is a significant advancement over existing half duplex methods.
Findings
Packet loss rate of primary users is significantly reduced.
Full duplex CRNs outperform half duplex CRNs in primary user packet loss.
Simulation results validate the effectiveness of the proposed scheme.
Abstract
As a key in cognitive radio networks (CRNs), dynamic spectrum access needs to be carefully designed to minimize the interference and delay to the \emph{primary} (licensed) users. One of the main challenges in dynamic spectrum access is to determine when the \emph{secondary} (unlicensed) users can use the spectrum. In particular, when the secondary user is using the spectrum, if the primary user becomes active to use the spectrum, it is usually hard for the secondary user to detect the primary user instantaneously, thus causing unexpected interference and delay to primary users. The secondary user cannot detect the presence of primary users instantaneously because the secondary user is unable to detect the spectrum at the same time while it is transmitting. To solve this problem, we propose the full duplex wireless communications scheme for CRNs. In particular, we employ the Antennas…
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Taxonomy
TopicsCognitive Radio Networks and Spectrum Sensing · Full-Duplex Wireless Communications · Advanced MIMO Systems Optimization
