상세정보
학술지
Energy-efficient mmWave Cell-free Massive MIMO Downlink Transmission with Low-resolution DACs and Phase Shifters
- 발행일
- 202212
- 출처
- ETRI Journal, v.44 no.6, pp.885-902
- ISSN
- 1225-6463
- 출판사
- 한국전자통신연구원 (ETRI)
- 협약과제
- 22HH1700, [통합과제] 5G NR 기반 지능형 오픈 스몰셀 기술 개발, 나지현
- 초록
- The mmWave cell-free massive MIMO (CFmMIMO), combining the advantages of wide bandwidth in the mmWave frequency band and the high- and uniform-spectral efficiency of CFmMIMO, has recently emerged as one of the enabling technologies for 6G. In this paper, we propose a novel framework for energy-efficient mmWave CFmMIMO systems that uses low-resolution digital?밶nalog converters (DACs) and phase shifters (PSs) to introduce low-complexity hybrid precoding. Additionally, we propose a heuristic pilot allocation scheme that makes the best effort to slash some interference from copilot users. The simulation results show that the proposed hybrid precoding and pilot allocation scheme outperforms the existing schemes. Furthermore, we reveal the relationship between the energy and spectral efficiencies for the proposed mmWave CFmMIMO system by modeling the whole network power consumption and observe that the introduction of low-resolution DACs and PSs is effective in increasing the energy efficiency by compromising the spectral efficiency and the network power consumption.
- KSP 제안 키워드
- Allocation scheme, Best Effort(BE), Enabling technologies, Energy Efficiency, Existing schemes, Hybrid Precoding, Network power, Phase Shifter, Pilot allocation, Power Consumption, Spectral efficiency(SE)
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