arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2610.26344eess.SP
收藏

可重构智能表面(RIS)发射机在采用接收合并技术时的性能研究

On the Performance of RIS-Empowered Transmitters with Receive Combining Techniques

Gebze Technical University(盖布泽理工大学);Tampere University(坦佩雷大学)

Muhammed Faruk Karabay, Oğuz Kucur, Ertugrul Basar

AI总结:

本文研究RIS实际相移约束对采用MRC和RAS的多天线系统性能的影响,推导中断概率闭式表达式并分析莱斯衰落信道下的渐近性能,发现RIS约束会降低MRC分集增益且RAS性能优于MRC。

摘要:

本文研究了可重构智能表面(RIS)的实际相移约束对采用最大比合并(MRC)和接收天线选择(RAS)的多天线系统性能的影响。由于RIS的每个元件在给定时间只能应用单一相移,当多个接收天线同时激活时,系统性能会大幅下降。为量化该影响,推导了中断概率的闭式表达式,并在莱斯衰落信道上进行了渐近分析。结果表明,RIS的实际相移约束会降低MRC的分集增益,且与这些技术的传统性能排序相反,RAS的性能优于MRC。

英文摘要:

Reconfigurable intelligent surface (RIS)-empowered transmitters offer a promising basis for hardware-efficient multi-antenna architectures in next-generation wireless networks. In particular, combining these transmitters with low-complexity reception techniques such as receive antenna selection (RAS) can further simplify the receiver architecture. In this paper, we investigate the impact of practical phase-shift constraint on RIS-empowered multi-antenna systems employing maximal ratio combining (MRC) and RAS. Since each RIS element can apply only a single phase-shift at a given time, the system performance degrades substantially when multiple receive antennas are active simultaneously. To quantify this effect, closed-form outage probability expressions are derived and asymptotic analyses are carried out over Rician fading channels. We show that the practical phase-shift constraint of RIS-based transmitters can degrade the diversity order of MRC and in addition, RAS outperforms MRC in the examined system models, contrary to the conventional performance ordering of these techniques.

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。

↑