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arXiv 2207.03052cs.ITeess.SPmath.IT
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具有非线性PA效率的能量高效发射波束成形和天线选择

Energy-Efficient Transmit Beamforming and Antenna Selection with Non-Linear PA Efficiency

Yuan Fang, Yi Huang, Chuan Ma, Yinghao Jin, Gaoyuan Cheng, Guanlin Wu, Jie Xu

摘要:

本文研究了由多天线基站(BS)和多个单天线用户组成的下行多天线多用户系统中的节能设计,考虑了实际的非线性功率放大器(PA)效率和每个发射天线处射频(RF)链的开关功耗。在此设置下,我们共同优化的发射波束成形和天线开/关选择在BS,以尽量减少其总功耗,同时确保在用户的个人信号干扰噪声比(SINR)的约束。然而,由于非线性PA效率和开关RF链功耗,所制定的SINR约束功率最小化问题是高度非凸的并且难以求解。为了解决这个问题,我们提出了一个有效的算法,以获得一个高质量的解决方案的基础上的技术顺序凸逼近(SCA)。我们提供了数值结果来验证我们所提出的设计的性能。结果表明,在优化的解决方案中,BS倾向于激活较少的天线,并在每个天线使用较高的功率传输,以利用非线性PA效率。

英文摘要:

This letter studies the energy-efficient design in a downlink multi-antenna multi-user system consisting of a multi-antenna base station (BS) and multiple single-antenna users, by considering the practical non-linear power amplifier (PA) efficiency and the on-off power consumption of radio frequency (RF) chain at each transmit antenna. Under this setup, we jointly optimize the transmit beamforming and antenna on/off selection at the BS to minimize its total power consumption while ensuring the individual signal-to-interference-plus-noise ratio (SINR) constraints at the users. However, due to the non-linear PA efficiency and the on-off RF chain power consumption, the formulated SINR-constrained power minimization problem is highly non-convex and difficult to solve. To tackle this issue, we propose an efficient algorithm to obtain a high-quality solution based on the technique of sequential convex approximation (SCA). We provide numerical results to validate the performance of our proposed design. It is shown that at the optimized solution, the BS tends to activate fewer antennas and use higher power transmission at each antenna to exploit the non-linear PA efficiency.

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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