Secure transmission using optimal antenna selection for MIMO underlay CRN with multiple primary users

Enhanced physical layer security for cognitive radio systems through joint spectrum access and power allocation

“…In recent years, numerous research works have been proposed for investigating the PHY security of CR systems, among which several techniques have been proposed to improve the PHY security of CR systems. The proposed solutions reported in the literature can be mainly classified into different categories, such as (i) beamforming‐based [15–17], (ii) radio resource allocation‐based [17, 18], (iii) relay‐assisted transmission [18–20], (iv) transmit antenna selection [21–24], (v) jamming‐based [11, 16], and (vi) game theoretic‐based [25] techniques and algorithms. For instance, the authors in [17] have investigated the PHY security of joint beamforming and power allocation scheme in a CR network.…”

“…In [27], the secrecy performance of a CR system equipped with a single antenna was studied over Nakagami‐ m fading channels. In [24], the authors showed that the secrecy performance of the CR network is improved by increasing the number of transmitting antennas, while it is degraded by increasing the number of PUs. In addition, the secrecy performance of transmit antenna selection was studied, in terms of SOP, in [28, 29] for a MIMO CR system over Nakagami‐ m fading channel.…”