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dc.contributor.author최준원-
dc.date.accessioned2019-11-26T06:06:13Z-
dc.date.available2019-11-26T06:06:13Z-
dc.date.issued2017-06-
dc.identifier.citationIEEE TRANSACTIONS ON COMMUNICATIONS, v. 65, no. 6, page. 2397-2410en_US
dc.identifier.issn0090-6778-
dc.identifier.issn1558-0857-
dc.identifier.urihttps://ieeexplore.ieee.org/document/7888476-
dc.identifier.urihttps://repository.hanyang.ac.kr/handle/20.500.11754/114650-
dc.description.abstractMultiuser multiple-input multiple-output (MUMIMO) transmission techniques have been popularly used to improve the spectral efficiency and user experience. However, due to the coarse knowledge of channel state information at the transmitter, the quality of transmit precoding to control multiuser interference is degraded, and hence, co-scheduled user equipment may suffer from large residual multiuser interference. In this paper, we propose a new channel estimation technique employing reliable soft symbols to improve the channel estimation and subsequent detection quality of MU-MIMO systems. To this end, we pick reliable data tones from both desired and interfering users and then use them as pilots to re-estimate the channel. In order to jointly estimate the channel and data symbols, we employ the expectation maximization algorithm, where the channel estimation and data decoding are performed iteratively. From numerical experiments in realistic MU-MIMO scenarios, we show that the proposed method achieves substantial performance gain in channel estimation and detection quality over conventional channel estimation approaches.en_US
dc.description.sponsorshipThis work was sponsored by Communications Research Team, DMC Research and Development Center, Samsung Electronics Co. Ltd, and the National Research Foundation of Korea grant funded by the Korean government(MSIP) (2016R1A2B3015576 & 2014R1A5A1011478). This paper was presented in part at the Personal Indoor Mobile Radio Communications Symposium, 2015 [1] and at the Vehicular Technology Conference, 2016 [2]. The associate editor coordinating the review of this paper and approving it for publication was S. Muhaidat. (Corresponding author: Byonghyo Shim.)en_US
dc.language.isoen_USen_US
dc.publisherIEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INCen_US
dc.subjectChannel estimationen_US
dc.subjectexpectation-maximization (EM)en_US
dc.subjectjoint channel estimation and detectionen_US
dc.subjectmultiple-input multiple-output (MIMO)en_US
dc.subjectorthogonal frequency division multiplexing (OFDM)en_US
dc.titleExpectation-Maximization-Based Channel Estimation for Multiuser MIMO Systemsen_US
dc.typeArticleen_US
dc.relation.no6-
dc.relation.volume65-
dc.identifier.doi10.1109/TCOMM.2017.2688447-
dc.relation.page2397-2410-
dc.relation.journalIEEE TRANSACTIONS ON COMMUNICATIONS-
dc.contributor.googleauthorPark, Sunho-
dc.contributor.googleauthorChoi, Jun Won-
dc.contributor.googleauthorSeol, Ji-Yun-
dc.contributor.googleauthorShim, Byonghyo-
dc.relation.code2017003566-
dc.sector.campusS-
dc.sector.daehakCOLLEGE OF ENGINEERING[S]-
dc.sector.departmentDIVISION OF ELECTRICAL AND BIOMEDICAL ENGINEERING-
dc.identifier.pidjunwchoi-
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COLLEGE OF ENGINEERING[S](공과대학) > ELECTRICAL AND BIOMEDICAL ENGINEERING(전기·생체공학부) > Articles
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