15,117 research outputs found
KIM WOO JAE
No full text학위논문(석사)--아주대학교 일반대학원 :전자공학과,2017. 21 Introduction 1
1.1 Background and Motivation ……………………. 1
1.2 Contributions ……………………………………. 2
1.3 Thesis Outline ……………………………………. 3
2 Uplink Energy Efficiency maximization 4
2.1 System Model …………………………………….. 4
2.2 Uplink Channel Estimation ……………………….. 6
2.3 Downlink Energy Transfer ……………………….. 6
2.4 Uplink Information Transfer ……………………. 7
2.5 Problem Formulation ………………………………. 8
2.6 EE Maximization Scheme …………………………. 9
2.7 Simulation Results …………………………………. 11
3 Uplink Minimum Throughput Maximization 14
3.1 System Model …………………………………….. 14
3.2 Problem Formulation ……………………………… 15
3.3 Joint Beamforming and Resource Allocation ….. 16
3.4 Simulation Results ……………………………….. 18
4 Conclusion 21
Reference 23MasterIn this thesis, we study a joint optimization for wireless powered communication network (WPCN) with distributed massive multi-input multi-output (DM-MIMO) system. We maximize the uplink (UL) energy efficiency (EE) and max-min throughput by jointly optimize energy beamforming, time allocation, power allocation, and receive beamforming.
Generally, in a WCPN, user terminals are charged wirelessly from signals radiated by transmitters and then use the harvested energy to transmit information signals. Thus, wireless energy transfer (WET) time affects both UL transmit power and capacity. When WET time has a small range, the average UL transmit power for the users is increased as time increase. However, when WET time becomes large, the wireless information transfer (WIT) time becomes the dominant factor and thus the user rates are decreased. Also, energy efficiency and guaranteeing minimum throughput has been recognized as a crucial issue in WPCN. It is due to the harvested energy from radiated signal is usually very small.
Therefore, in this thesis, joint time allocation, power allocation, and beamforming optimization algorithms to solve EE maximization and max-min throughput maximization problem are proposed. The simulation results show that the proposed schemes can achieve a significant performance gain. Further, it reveals that the achievable EE and max-min capacity of the DM-MIMO is considerably higher than that of a conventional centralized massive multi-input multi-output (CM-MIMO) system
Supplemental Material - Serum Human Epididymis Protein 4 as a Prognostic Marker in Cervical Cancer
No full textSupplemental Material for Serum Human Epididymis Protein 4 as a Prognostic Marker in Cervical Cancer by Woo Yeon Hwang, Dong Hoon Suh, Kidong Kim, Yong Beom Kim, and Jae Hong No in Cancer Control.</p
Light-load efficiency improvement using load adaptive gate driving method
No full textIn this paper, a new gate driving method to improve light-load efficiency is proposed for the power conversion system with a standby converter. The proposed method reduces the gate driving voltage of power MOSFETs and operating voltage of controller ICs under light load conditions by adjusting the auxiliary output voltage of the standby converter. Therefore, the gate driving loss on MOSFETs and the loss on controller ICs are significantly reduced without the degradation of performance in the main power stage. To confirm the validity of this study, the DC/DC server power supply with 48V input, 12V/60A output for the DC/DC stage, and 5V/3A output for the standby stage is experimented
New Lipsothrix (Diptera: Limoniidae) from Korea
No full textPodenas, Sigitas, Petersen, Matthew, Kim, A-Young, Park, Sun-Jae, Byun, Hye-Woo, Seo, Hong-Yul (2019): New Lipsothrix (Diptera: Limoniidae) from Korea. Zootaxa 4688 (4): 561-568, DOI: 10.11646/zootaxa.4688.4.
Supplementary_Table_1_(1) - Effectiveness and Safety of Simultaneous Integrated Boost-Proton Beam Therapy for Localized Pancreatic Cancer
No full textSupplementary_Table_1_(1) for Effectiveness and Safety of Simultaneous Integrated Boost-Proton Beam Therapy for Localized Pancreatic Cancer by Tae Hyun Kim, Woo Jin Lee, Sang Myung Woo, Hyunjung Kim, Eun Sang Oh, Ju Hee Lee, Sung-Sik Han, Sang-Jae Park, Yang-Gun Suh, Sung Ho Moon, Sang Soo Kim, and Dae Yong Kim in Technology in Cancer Research & Treatment</p
New Atypophthalmus (Diptera: Limoniidae) from South Korea
No full textPodenas, Sigitas, Podeniene, Virginija, Seo, Hong-Yul, Kim, A-Young, Park, Sun-Jae, Byun, Hye-Woo, Kim, Heung-Chul, Aukštikalnienė, Rasa (2020): New Atypophthalmus (Diptera: Limoniidae) from South Korea. Zootaxa 4732 (2): 281-294, DOI: https://doi.org/10.11646/zootaxa.4732.2.
sj-pdf-1-imr-10.1177_03000605231206319 - Supplemental material for Concurrent laparoscopic highly selective vagotomy with closure of duodenal ulcer perforations show good clinical results as primary repair alone
No full textSupplemental material, sj-pdf-1-imr-10.1177_03000605231206319 for Concurrent laparoscopic highly selective vagotomy with closure of duodenal ulcer perforations show good clinical results as primary repair alone by Ji-Ho Park, Jin‑Kwon Lee, Dong-Hwan Kim, Jae-Seok Min, Tae-Han Kim, Eun-Jung Jung, Taejin Park, Jae Yool Jang, Jung-Woo Woo, Han Shin lee, Miyeong Park and Sang-Ho Jeong in Journal of International Medical Research</p
sj-mp4-2-imr-10.1177_03000605231206319 - Supplemental material for Concurrent laparoscopic highly selective vagotomy with closure of duodenal ulcer perforations show good clinical results as primary repair alone
No full textSupplemental material, sj-mp4-2-imr-10.1177_03000605231206319 for Concurrent laparoscopic highly selective vagotomy with closure of duodenal ulcer perforations show good clinical results as primary repair alone by Ji-Ho Park, Jin‑Kwon Lee, Dong-Hwan Kim, Jae-Seok Min, Tae-Han Kim, Eun-Jung Jung, Taejin Park, Jae Yool Jang, Jung-Woo Woo, Han Shin lee, Miyeong Park and Sang-Ho Jeong in Journal of International Medical Research</p
Low noise high performance 50nm T-gate metamorphic HEMT with cut-off frequency f<sub>T</sub> of 440 GHz for millimeterwave imaging receivers applications
Get PDFThe 50 nm m-HEMT exhibits extremely high f<sub>T</sub>, of 440GHz, low F<sub>min</sub> of 0.7 dB, associated gain of 13 dB at 26 GHz with an exceptionally high Id of 200 mA/mm and gm of 950 ms/mm at low noise biased point
MSJ913970_supplemental_table – Supplemental material for Recurrence of clinical events at the same anatomical location in patients with MOG antibody-associated disease
No full textSupplemental material, MSJ913970_supplemental_table for Recurrence of clinical events at the same anatomical location in patients with MOG antibody-associated disease by Jae-Won Hyun, Young Nam Kwon, Hye Lim Lee, Woo Kyo Jeong, Hye Jung Lee, Byoung Joon Kim, Seung Woo Kim, Ha Young Shin, Hyun-June Shin, Sun-Young Oh, Min Young Lee, Su-Hyun Kim, So-Young Huh, Woojun Kim, Min Su Park, Sun-Young Kim, Sung-Min Kim and Ho Jin Kim in Multiple Sclerosis Journal</p
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