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Kang, Myung Gil
Publications (2 of 2) Show all publications
Kim, Y.-b., Kang, M. G. & Choi, W. (2019). Diversity-Multiplexing Tradeoff of the Two-User X-channel with Two Antennas. In: ICC 2019 - 2019 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC): . Paper presented at IEEE International Conference on Communications (ICC), Shanghai, PEOPLES R CHINA, MAY 20-24, 2019.
Open this publication in new window or tab >>Diversity-Multiplexing Tradeoff of the Two-User X-channel with Two Antennas
2019 (English)In: ICC 2019 - 2019 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC), 2019Conference paper, Published paper (Refereed)
Abstract [en]

Besides maximizing multiplexing gain. improving diversity is important for reliable communications in the presence of interference. In this context, on-off switched interference alignment (IA) is investigated, where IA is intermittently utilized by switching IA on/off in order to improve diversity gain in an interference channel and hence to maximize diversity multiplexing tradeoff (DMT). This paper adopts Alamouti coding based IA for the on-off switched IA, which requires only local channel state information at the transmitter. Optimizing the portion of IA utilization of the proposed scheme in closed form, we derive the achievable DMT and show that the intermittent utilization of IA with simultaneous non-unique decoding can improve DMT in the 2-user X-channel with two antennas. The proposed scheme, to the best of our knowledge, surpasses any other existing schemes for the 2-user X-channel with two antennas and is closed to the ideal DMT.

Series
IEEE International Conference on Communications, ISSN 1550-3607
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:miun:diva-37673 (URN)10.1109/ICC.2019.8761972 (DOI)000492038805095 ()978-1-5386-8088-9 (ISBN)
Conference
IEEE International Conference on Communications (ICC), Shanghai, PEOPLES R CHINA, MAY 20-24, 2019
Available from: 2019-11-14 Created: 2019-11-14 Last updated: 2020-01-09Bibliographically approved
Kim, Y.-b., Kang, M. G. & Choi, W. (2019). On-off Switched Interference Alignment for Diversity Multiplexing Tradeoff Improvement in the 2-User X-Network with Two Antennas. IEEE Transactions on Wireless Communications, 18(1), 546-558
Open this publication in new window or tab >>On-off Switched Interference Alignment for Diversity Multiplexing Tradeoff Improvement in the 2-User X-Network with Two Antennas
2019 (English)In: IEEE Transactions on Wireless Communications, ISSN 1536-1276, E-ISSN 1558-2248, Vol. 18, no 1, p. 546-558Article in journal (Refereed) Published
Abstract [en]

To improve diversity gain in an interference channel and hence to maximize diversity multiplexing tradeoff (DMT), we propose on-off switched interference alignment (IA) where IA is intermittently utilized by switching IA on/off. For on-off switching, either IA with symbol extension or IA with Alamouti coding is adopted in this paper. Deriving and analyzing DMT of the proposed schemes, we reveal that the intermittent utilization of IA with simultaneous non-unique decoding can improve DMT in the 2-user X-channel with two antennas. Both the proposed schemes are shown to achieve diversity gain of 4 and DoF per user of 4/3 . In particular, the on-off switched IA with Alamouti coding, to the best of our knowledge, surpasses any other existing schemes for the 2-user X-channel with two antennas and nearly approaches the ideal DMT. 

Place, publisher, year, edition, pages
IEEE, 2019
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:miun:diva-35245 (URN)10.1109/TWC.2018.2882833 (DOI)000456139200038 ()2-s2.0-85057818644 (Scopus ID)
Available from: 2018-12-17 Created: 2018-12-17 Last updated: 2019-10-16Bibliographically approved
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