Subpacketization - Beamformer Interaction in Multi-Antenna Coded Caching

M. Salehi, Antti Tölli, S. P. Shariatpanahi
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引用次数: 6

Abstract

We study the joint effect of beamformer structure and subpacketization level on the achievable rate of cache-enabled multi-antenna communications. We use appropriate low-SNR approximations, to show that using simple zero-forcing (ZF) beamformers, increasing subpacketization degrades the achievable rate; in contrast to what has been shown in the literature for more complex, optimized beamformers. We also numerically analyze the probability distribution of symmetric rate terms, in order to confirm the validity of mathematical outputs. The results suggest that for improving the content delivery rate at low-SNR, subpacketization level and beamformer complexity should be jointly increased.
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子分组——多天线编码缓存中的波束形成器相互作用
研究了波束形成器结构和子分组水平对高速缓存多天线通信可实现速率的共同影响。我们使用适当的低信噪比近似,表明使用简单的零强迫(ZF)波束成形器,增加亚分组会降低可实现速率;与文献中显示的更复杂、优化的波束形成器相反。我们还对对称率项的概率分布进行了数值分析,以确认数学结果的有效性。结果表明,为了提高低信噪比下的内容传输速率,应提高亚分组水平和波束形成器的复杂度。
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