Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 최준원 | - |
dc.date.accessioned | 2022-03-10T00:41:52Z | - |
dc.date.available | 2022-03-10T00:41:52Z | - |
dc.date.issued | 2020-06 | - |
dc.identifier.citation | IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, v. 19, no. 6, page. 3658-3672 | en_US |
dc.identifier.issn | 1536-1276 | - |
dc.identifier.issn | 1558-2248 | - |
dc.identifier.uri | https://ieeexplore.ieee.org/document/9014542 | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/168957 | - |
dc.description.abstract | Cell-free system where a group of base stations (BSs) cooperatively serves users has received much attention as a promising technology for the future wireless systems. In order to maximize the cooperation gain in the cell-free systems, acquisition of downlink channel state information (CSI) at the BSs is crucial. While this task is relatively easy for the time division duplexing (TDD) systems due to the channel reciprocity, it is not easy for the frequency division duplexing (FDD) systems due to the CSI feedback overhead. This issue is even more pronounced in the cell-free systems since the user needs to feed back the CSIs of multiple BSs. In this paper, we propose a novel feedback reduction technique for the FDD-based cell-free systems. Key feature of the proposed technique is to choose a few dominating paths and then feed back the path gain information (PGI) of the chosen paths. By exploiting the property that the angles of departure (AoDs) are quite similar in the uplink and downlink channels (this property is referred to as angle reciprocity), the BSs obtain the AoDs directly from the uplink pilot signal. From the extensive simulations, we observe that the proposed technique can achieve more than 60% reduction in feedback overhead over the conventional CSI feedback scheme. | en_US |
dc.description.sponsorship | This work was supported in part by the Institute of Information & communications Technology Planning & Evaluation (IITP) grant funded by the Korea government (MSIT) (No.2018-0-01410, Development of Radio Transmission Technologies for High Capacity and Low Cost in Ultra Dense Networks) and in part by the MSIT (Ministry of Science and ICT), Korea, under the ITRC (Information Technology Research Center) support program (IITP-2020-2017-0-01637) supervised by the IITP (Institutefor Information & communications Technology Promotion). This article was presented at the ICC, Shanghai, China, May 2019. The associate editor coordinating the review of this article and approving it for publication was L. Dasilva. | en_US |
dc.language.iso | en | en_US |
dc.publisher | IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC | en_US |
dc.subject | Cell-free systems | en_US |
dc.subject | frequency division duplexing (FDD) | en_US |
dc.subject | feedback reduction | en_US |
dc.subject | angle reciprocity | en_US |
dc.subject | path selection | en_US |
dc.title | Downlink Pilot Precoding and Compressed Channel Feedback for FDD-Based Cell-Free Systems | en_US |
dc.type | Article | en_US |
dc.relation.no | 6 | - |
dc.relation.volume | 19 | - |
dc.identifier.doi | 10.1109/TWC.2020.2974838 | - |
dc.relation.page | 3658-3672 | - |
dc.relation.journal | IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS | - |
dc.contributor.googleauthor | Kim, Seungnyun | - |
dc.contributor.googleauthor | Choi, Jun Won | - |
dc.contributor.googleauthor | Shim, Byonghyo | - |
dc.relation.code | 2020053773 | - |
dc.sector.campus | S | - |
dc.sector.daehak | COLLEGE OF ENGINEERING[S] | - |
dc.sector.department | SCHOOL OF ELECTRICAL AND BIOMEDICAL ENGINEERING | - |
dc.identifier.pid | junwchoi | - |
dc.identifier.orcid | https://orcid.org/0000-0002-3733-0148 | - |
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