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학술지 Frequency divided group beamforming with sparse spacefrequency code for above 6 GHz URLLC systems
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저자
윤찬호, 조원철, 장갑석, 고영조
발행일
202212
출처
ETRI Journal, v.44 no.6, pp.925-935
ISSN
1225-6463
출판사
한국전자통신연구원 (ETRI)
DOI
https://dx.doi.org/10.4218/etrij.2022-0207
협약과제
22HH1300, [통합과제] 초고주파 이동통신 무선백홀 전문연구실, 고영조
초록
In this study, we propose a limited feedback-based frequency divided group beamforming with sparse space-frequency transmit diversity coded orthogonal frequency division multiplexing (OFDM) system for ultrareliable low latency communication (URLLC) scenario. The proposed scheme has several advantages over the traditional hybrid beamforming approach, including not requiring downlink channel state information for baseband precoding, supporting distributed multipoint transmission structures for diversity, and reducing beam sweeping latency with little uplink overhead. These are all positive aspects of physical layer characteristics intended for URLLC. It is suggested in the system to manage the multipoint transmission structure realized by distributed panels using a power allocation method based on cooperative game theory. Link-level simulations demonstrate that the proposed scheme offers reliability by achieving both higher diversity order and array gain in a non-line-of-sight channel of selectivity and limited spatial scattering.
KSP 제안 키워드
6 GHz, Allocation method, Beam sweeping, Channel State Information(CSI), Coded Orthogonal Frequency Division Multiplexing, Diversity Order, Layer characteristics, Line-Of-Sight(LOS), Link level simulation, Low latency, Non Line-of-sight(NLOS)
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