论文标题
降低合作非正交多访问的相互停战概率
Reducing the Mutual Outage Probability of Cooperative Non-Orthogonal Multiple Access
论文作者
论文摘要
在这封信中，提出了一种新的权力分配计划，以提高合作性非正交多访问（Co-Noma）的可靠性。强大的用户分配了最大功率，而弱者则分配了最小功率。此功率分配与用户在信号与干扰和噪声比（SINR）的情况下改变了解码序列。较弱的用户受益于接收信号的多个副本，而强大的用户则从较高的功率分配中受益。数值模拟结果表明，与Conyoma的常规功率分配方案相比，该提出的方案具有较低的相互停战概率（MOP），并具有更好的可靠性。对于两用户共同系统，得出了MOP的精确闭合形式表达式，并且显示每个用户都实现了完全的多样性。与实用的非功率平衡情况下，所提出的分配能够在15 dB时达到15 dB时的传输速率高约30％。
In this letter, a new power allocation scheme is proposed to improve the reliability of cooperative non-orthogonal multiple access (CO-NOMA). The strong user is allocated the maximum power, whereas the weak user is allocated the minimum power. This power allocation alters the decoding sequence along with the signal-to-interference plus noise ratio (SINR), at the users. The weak user benefits from receiving multiple copies of the signal whereas the strong user benefits from the higher power allocation. Numerical simulation results show that the proposed scheme has a lower mutual outage probability (MOP) and offers better reliability as compared to the conventional power allocation scheme for CONOMA. An exact closed-form expression of MOP is derived for the two-user CO-NOMA system and it is shown that each user achieves full diversity. The proposed allocation is able to achieve approximately 30% higher transmission rate at 15 dB as compared to conventional CO-NOMA in a practical non-power balanced scenario.
