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arXiv 2103.16503cs.ITeess.SPmath.IT
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不可信NOMA的解码顺序和功率分配:一个秘密的视角

Decoding Orders and Power Allocation for Untrusted NOMA: A Secrecy Perspective

Sapna Thapar, Deepak Mishra, Ravikant Saini

摘要:

非正交多址接入(NOMA)和物理层安全的融合是提供频谱高效安全的第五代网络的重要研究兴趣。观察多路复用的NOMA用户之间的保密性问题,这是源于连续干扰消除的解码在接收机,我们专注于保护不可信的NOMA。考虑到用户之间的隐私问题,研究了合适的安全解码顺序和用户的功率分配。具体而言,解码顺序策略,提出了有效地提供积极的保密在所有NOMA用户。给出了一种算法,通过该算法可以得到所有与所提出的译码顺序策略一致的可行的安全译码顺序。进一步,以最大化系统的和保密率为目标,数值求解了解码顺序和PA的联合解。此外,提出了一种次优解码顺序解决方案。最后,数值结果提出了有用的见解的关键系统参数的影响,并表明,平均保密率性能增益约27 dB的联合优化的解决方案,在不同的相关计划。

英文摘要:

The amalgamation of non-orthogonal multiple access (NOMA) and physical layer security is a significant research interest for providing spectrally-efficient secure fifth-generation networks. Observing the secrecy issue among multiplexed NOMA users, which is stemmed from successive interference cancellation based decoding at receivers, we focus on safeguarding untrusted NOMA. Considering the problem of each user's privacy from each other, the appropriate secure decoding order and power allocation (PA) for users are investigated. Specifically, a decoding order strategy is proposed which is efficient in providing positive secrecy at all NOMA users. An algorithm is also provided through which all the feasible secure decoding orders in accordance with the proposed decoding order strategy can be obtained. Further, in order to maximize the sum secrecy rate of the system, the joint solution of decoding order and PA is obtained numerically. Also, a sub-optimal decoding order solution is proposed. Lastly, numerical results present useful insights on the impact of key system parameters and demonstrate that average secrecy rate performance gain of about 27 dB is obtained by the jointly optimized solution over different relevant schemes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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