On the Secrecy Performance of NOMA-Based Cognitive Radio Networks with STBC

LI Mei-ling; TIAN Li-li; YANG Xiao-xia; LI Ying; WANG An-hong; DONG Zeng-shou; Sami Muhaidat; Mehrdad Dianati

doi:10.3969/j.issn.0372-2112.2020.03.007

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On the Secrecy Performance of NOMA-Based Cognitive Radio Networks with STBC

更新时间：2025-07-16

- On the Secrecy Performance of NOMA-Based Cognitive Radio Networks with STBC
- Acta Electronica Sinica Vol. 48, Issue 3, Pages: 463-469(2020)
- 作者机构：
  
  1. 太原科技大学电子信息工程学院,山西,太原,030024
  2. Khalifa大学, 阿联酋阿布扎比
  3. 华威大学,英格兰,英国
  4. 太原科技大学电子信息工程学院,山西,太原,030024
  5. Khalifa大学阿联酋阿布扎比
  6. 华威大学,英格兰,英国
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0372-2112.2020.03.007
  CLC： TN911.1
- Published Online：25 March 2020，
  
  Published：2020
- 稿件说明：
移动端阅览
LI Mei-ling, TIAN Li-li, YANG Xiao-xia, et al. On the Secrecy Performance of NOMA-Based Cognitive Radio Networks with STBC[J]. Acta Electronica Sinica, 2020, 48(3): 463-469.
DOI：

LI Mei-ling, TIAN Li-li, YANG Xiao-xia, et al. On the Secrecy Performance of NOMA-Based Cognitive Radio Networks with STBC[J]. Acta Electronica Sinica, 2020, 48(3): 463-469. DOI： 10.3969/j.issn.0372-2112.2020.03.007.

摘要

基于非正交多址接入（NOMA，Non-Orthogonal Multiple Access）的认知无线电（CR，Cognitive Radio）网络物理层传输面临主用户干扰和第三方窃听双重干扰威胁.本文提出利用空时编码（STBC，Space Time Block Coding）技术提高认知用户物理层安全性能，推导了任意认知用户的安全中断概率闭合表达式.通过蒙特卡洛仿真进行验证，结果表明，所提STBC-CR-NOMA相比未采用STBC编码方案的CR-NOMA可以明显提高用户的安全中断概率，且随着认知发射功率的增大，近端用户安全中断性能提高越大，而远端用户安全中断性能提升受认知基站发射功率的影响较小.仿真结果还表明，通过调整功率分配系数对远端用户和近端用户的安全中断性能影响不同.

Abstract

The physical layer transmission faces the interference from primary users and eavesdroppers in cognitive radio networks based on non-orthogonal multiple access (CR-NOMA). In this paper

Alamouti space-time block coded (STBC) is utilized to improve the physical layer security transmission performance. The closed-form expressions for the security outage probability of all secondary users are derived. We provide extensive Monte-Carlo simulation results to corroborate the analysis. The results show that the security outage probability of stronger cognitive users is improved by the proposed STBC-NOMA-based CR compared with the traditional NOMA-based CR. Moreover

the security outage probability of the stronger cognitive users experiences performance enhancement with the increase of the cognitive transmission power

whilst the security outage probability of weaker cognitive users will be less impacted by the transmission power. In addition

we demonstrate that the power allocation coefficients will have different impact on the stronger cognitive users and the weaker users.

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