认知无线电网络中基于主系统有限反馈的频谱共享方案

发布时间：2019-04-02 18:26

【摘要】：提出一种频谱共享方案,该方案适用于同时存在多个主用户和一对次用户的场景。各主用户依据接收机反馈的有限信道质量信息(CQI,channel quality information)分配发送功率及传输速率。次用户根据偷听到的主系统CQI有限反馈,以适当的功率及速率接入信道。次用户接入信道的行为对各主用户造成一定干扰,以致主系统传输速率遭受一定损失。在主系统速率损失约束条件下,得出了使次系统吞吐量最大化的次用户发送功率及传输速率最佳分配方案。数值结果表明,对于每个主用户仅需反馈3~4个量化比特,次系统的有效吞吐量就可堪比于主次发射端均拥有主系统链路完整CQI的情况。仿真结果显示,所提出的频谱共享方案能够满足主系统速率损失约束。
[Abstract]:A spectrum sharing scheme is proposed, which is suitable for scenarios in which multiple primary users and one pair of secondary users exist at the same time. Each master user allocates transmission power and transmission rate according to the limited channel quality information (CQI,channel quality information) feedback from the receiver. Secondary users access the channel with appropriate power and rate based on overheard master system CQI limited feedback. The behavior of the secondary user access channel causes certain interference to each primary user, so that the transmission rate of the primary system suffers a certain loss. Under the constraint of the rate loss of the master system, the optimal allocation scheme for the transmission power and transmission rate of the secondary system is obtained, which maximizes the throughput of the secondary system. The numerical results show that the effective throughput of the secondary system can be compared with the case that the primary and secondary transmitter has a complete CQI of the primary system link for each primary user with only 3 / 4 quantized bits feedback. The simulation results show that the proposed spectrum sharing scheme can satisfy the rate loss constraint of the main system.
【作者单位】：南京邮电大学宽带无线通信与传感网技术教育部重点实验室;东南大学移动通信国家重点实验室;
【基金】：国家自然科学基金资助项目(60972041,61271234) 教育部博士点基金资助项目(20123223110002) 东南大学移动通信国家重点实验室开放课题基金资助项目江苏省研究生创新计划基金资助项目(CX09B-146Z) 江苏高校优势学科建设工程资助项目——“信息与通信工程”基金资助项目~~
【分类号】：TN925

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