Pub Date : 2023-01-01DOI: 10.5515/kjkiees.2023.34.1.9
Sungsik Ohm, Eunjung Kang, Jun-Yong Lee, H. Choo
{"title":"Design of Broadband High-Gain Antipodal Vivaldi Antenna for\u0000 2.45/5.8 GHz Wireless Power Transmission Systems","authors":"Sungsik Ohm, Eunjung Kang, Jun-Yong Lee, H. Choo","doi":"10.5515/kjkiees.2023.34.1.9","DOIUrl":"https://doi.org/10.5515/kjkiees.2023.34.1.9","url":null,"abstract":"","PeriodicalId":55817,"journal":{"name":"Journal of the Korean Institute of Electromagnetic Engineering and Science","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90085047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.5515/kjkiees.2023.34.1.49
Sung-Geon Kim, Sung-Sil Cho, I. Hong, J. Yook
{"title":"Optimizing the Electromagnetic Environment at Tension Membrane\u0000 Structured Drone Test Sites","authors":"Sung-Geon Kim, Sung-Sil Cho, I. Hong, J. Yook","doi":"10.5515/kjkiees.2023.34.1.49","DOIUrl":"https://doi.org/10.5515/kjkiees.2023.34.1.49","url":null,"abstract":"","PeriodicalId":55817,"journal":{"name":"Journal of the Korean Institute of Electromagnetic Engineering and Science","volume":"51 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76608509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.5515/kjkiees.2022.34.1.25
Junsang Yoo, Yun Suk Cho, Chang-Joo Kim, Heeyul Choi, Youngsik Kim
Technology for classifying low probability of intercept (LPI) radar signals with speed and accuracy is critical for cognitive communication research. We used time-frequency analysis (TFA) and deep learning to classify 12 typical LPI radar signals. Traditional methods use the Choi-Williams distribution (CWD), which requires more than 500 times longer TFA generation time than the spectrogram method. In this paper, we show the trade-off relationship between classification accuracy and detection time using a spectrogram, Wigner-Ville distribution (WVD), and CWD as the training datasets. As a result, the CWD model showed higher accuracy than the spectrogram model, but the prediction time was more than 200 times longer. The accuracy difference was only 1 %p for an SNR over −2 dB, but it reached 7.5%p for an SNR of −10 dB. Therefore, a lower SNR shows a distinct trade-off between prediction time and accuracy, depending on the type of TFA.
{"title":"Time and Accuracy Trade-Off of LPI Radar Classification Technology Based on Time-Frequency Analysis and Deep Learning","authors":"Junsang Yoo, Yun Suk Cho, Chang-Joo Kim, Heeyul Choi, Youngsik Kim","doi":"10.5515/kjkiees.2022.34.1.25","DOIUrl":"https://doi.org/10.5515/kjkiees.2022.34.1.25","url":null,"abstract":"Technology for classifying low probability of intercept (LPI) radar signals with speed and accuracy is critical for cognitive communication research. We used time-frequency analysis (TFA) and deep learning to classify 12 typical LPI radar signals. Traditional methods use the Choi-Williams distribution (CWD), which requires more than 500 times longer TFA generation time than the spectrogram method. In this paper, we show the trade-off relationship between classification accuracy and detection time using a spectrogram, Wigner-Ville distribution (WVD), and CWD as the training datasets. As a result, the CWD model showed higher accuracy than the spectrogram model, but the prediction time was more than 200 times longer. The accuracy difference was only 1 %p for an SNR over −2 dB, but it reached 7.5%p for an SNR of −10 dB. Therefore, a lower SNR shows a distinct trade-off between prediction time and accuracy, depending on the type of TFA.","PeriodicalId":55817,"journal":{"name":"Journal of the Korean Institute of Electromagnetic Engineering and Science","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135949485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.5515/kjkiees.2023.34.1.61
Tae-Hong Kim, Jae-Gwang Kwon, Jun-O An, J. Pack, Jong-Il Lee, D. Choi, Ki-Hwea Kim
{"title":"Assessment Study of Electromagnetic Wave Exposure by FMCW Radar\u0000 Signal","authors":"Tae-Hong Kim, Jae-Gwang Kwon, Jun-O An, J. Pack, Jong-Il Lee, D. Choi, Ki-Hwea Kim","doi":"10.5515/kjkiees.2023.34.1.61","DOIUrl":"https://doi.org/10.5515/kjkiees.2023.34.1.61","url":null,"abstract":"","PeriodicalId":55817,"journal":{"name":"Journal of the Korean Institute of Electromagnetic Engineering and Science","volume":"54 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78136601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.5515/kjkiees.2023.34.1.25
Junsang Yoo, Yun Suk Cho, Chang-Joo Kim, Hee-Ju Choi, Youngsik Kim
{"title":"Time and Accuracy Trade-Off of LPI Radar Classification Technology\u0000 Based on Time-Frequency Analysis and Deep Learning","authors":"Junsang Yoo, Yun Suk Cho, Chang-Joo Kim, Hee-Ju Choi, Youngsik Kim","doi":"10.5515/kjkiees.2023.34.1.25","DOIUrl":"https://doi.org/10.5515/kjkiees.2023.34.1.25","url":null,"abstract":"","PeriodicalId":55817,"journal":{"name":"Journal of the Korean Institute of Electromagnetic Engineering and Science","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84042850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-01DOI: 10.5515/kjkiees.2022.33.12.939
Jeong-Jae Seo, Yong Hong
{"title":"Adaptive Beam Scheduling Algorithm Considering Changes in the\u0000 Posture and Position of Airborne Radar","authors":"Jeong-Jae Seo, Yong Hong","doi":"10.5515/kjkiees.2022.33.12.939","DOIUrl":"https://doi.org/10.5515/kjkiees.2022.33.12.939","url":null,"abstract":"","PeriodicalId":55817,"journal":{"name":"Journal of the Korean Institute of Electromagnetic Engineering and Science","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75082485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-01DOI: 10.5515/kjkiees.2022.33.12.960
Juho Yun, J. Paik, Jong-Jin Park, Ki-Don Yoon, Kwan-Sung Kim
{"title":"A Study of Motion Compensation for Electronic Beam on Sea\u0000 Environments","authors":"Juho Yun, J. Paik, Jong-Jin Park, Ki-Don Yoon, Kwan-Sung Kim","doi":"10.5515/kjkiees.2022.33.12.960","DOIUrl":"https://doi.org/10.5515/kjkiees.2022.33.12.960","url":null,"abstract":"","PeriodicalId":55817,"journal":{"name":"Journal of the Korean Institute of Electromagnetic Engineering and Science","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77779255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-01DOI: 10.5515/kjkiees.2022.33.12.948
Yang Hong, Sung-Woo Byun, Jae-Hee Ro, Hyun-jin Kang, Jae-Yoon Kim
{"title":"Development of LDA Based Hand Gesture Classification Algorithm\u0000 Using Distributed Radar System","authors":"Yang Hong, Sung-Woo Byun, Jae-Hee Ro, Hyun-jin Kang, Jae-Yoon Kim","doi":"10.5515/kjkiees.2022.33.12.948","DOIUrl":"https://doi.org/10.5515/kjkiees.2022.33.12.948","url":null,"abstract":"","PeriodicalId":55817,"journal":{"name":"Journal of the Korean Institute of Electromagnetic Engineering and Science","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78715397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-01DOI: 10.5515/kjkiees.2022.33.12.919
Jong-Eon Park
{"title":"Improvement Measures for the Maritime Search and Rescue Information\u0000 Delivery System","authors":"Jong-Eon Park","doi":"10.5515/kjkiees.2022.33.12.919","DOIUrl":"https://doi.org/10.5515/kjkiees.2022.33.12.919","url":null,"abstract":"","PeriodicalId":55817,"journal":{"name":"Journal of the Korean Institute of Electromagnetic Engineering and Science","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74423997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-01DOI: 10.5515/kjkiees.2022.33.12.911
Kyutaek Oh, Sangjin Yoo, O. Lee
{"title":"Design of a Compact-Sized Broadband Lumped-Distributed Balun\u0000 Including Impedance Matching","authors":"Kyutaek Oh, Sangjin Yoo, O. Lee","doi":"10.5515/kjkiees.2022.33.12.911","DOIUrl":"https://doi.org/10.5515/kjkiees.2022.33.12.911","url":null,"abstract":"","PeriodicalId":55817,"journal":{"name":"Journal of the Korean Institute of Electromagnetic Engineering and Science","volume":"92 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72632844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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