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arXiv 1801.07884cs.ITmath.IT
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上行链路MIMO-NOMA与MRC-SIC接收机的联合导频和有效载荷功率控制

Joint Pilot and Payload Power Control for Uplink MIMO-NOMA with MRC-SIC Receivers

Zhiqiang Wei, Derrick Wing Kwan Ng, Jinhong Yuan

摘要:

该文提出了一种联合导频和有效载荷功率分配(JPA)方案,以缓解上行链路多输入多输出非正交多址(MIMO-NOMA)系统的误差传播问题。在基站上采用最大比合并和连续干扰消除(MRC-SIC)接收机进行多用户检测。通过考虑信道估计误差引起的误差传播,分析了MRC-SIC解码过程中每个用户的平均信干噪比(ASINR)。此外,JPA设计制定为一个非凸优化问题,以最大限度地提高最小加权ASINR和几何规划的最佳解决方案。仿真结果证实了性能分析,并表明,我们提出的方案可以有效地减轻错误传播的MRC-SIC和提高检测性能,特别是对于中等能量预算的用户。

英文摘要:

This letter proposes a joint pilot and payload power allocation (JPA) scheme to mitigate the error propagation problem for uplink multiple-input multiple-output non-orthogonal multiple access (MIMO-NOMA) systems. A base station equipped with a maximum ratio combining and successive interference cancellation (MRC-SIC) receiver is adopted for multiuser detection. The average signal-to-interference-plus-noise ratio (ASINR) of each user during the MRC-SIC decoding is analyzed by taking into account the error propagation due to the channel estimation error. Furthermore, the JPA design is formulated as a nonconvex optimization problem to maximize the minimum weighted ASINR and is solved optimally with geometric programming. Simulation results confirm the developed performance analysis and show that our proposed scheme can effectively alleviate the error propagation of MRC-SIC and enhance the detection performance, especially for users with moderate energy budgets.

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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