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Yang, Hyun Jong
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dc.citation.endPage 2937 -
dc.citation.number 11 -
dc.citation.startPage 2922 -
dc.citation.title IEEE TRANSACTIONS ON SIGNAL PROCESSING -
dc.citation.volume 62 -
dc.contributor.author Yang, Hyun Jong -
dc.contributor.author Jung, Bang Chul -
dc.contributor.author Shin, Won-Yong -
dc.contributor.author Paulraj, Arogyaswami -
dc.date.accessioned 2023-12-22T02:39:09Z -
dc.date.available 2023-12-22T02:39:09Z -
dc.date.created 2014-06-02 -
dc.date.issued 2014-06 -
dc.description.abstract For the multiple-input multiple-output interfering multiple-access channels (IMACs), opportunistic interference alignment (OIA) using the singular value decomposition (SVD)-based beamforming at each user fundamentally reduces the user scaling condition required to achieve any target DoF, compared to that for the single-input multiple-output IMAC. In this paper, we tackle two practical challenges of the existing SVD-based OIA: 1) the need of full feedforward of the selected users' beamforming weight vectors and 2) a low rate achieved based on the exiting zero-forcing receiver. We first propose a codebook-based OIA, in which the weight vectors are chosen from a predefined codebook with a finite size so that information of the weight vectors can be sent to the belonging BS with limited feedforward. We derive the codebook size required to achieve the same user scaling condition as the SVD-based OIA case for both Grassmannian and random codebooks. Surprisingly, it is shown that the derived codebook size is the same for the two codebook methods. Second, we introduce an enhanced receiver at the base stations (BSs) in pursuit of further improving the achievable rate. Assuming no collaboration between the BSs, the interfering links between a BS and the selected users in neighboring cells are difficult to be acquired at the belonging BS. We propose the use of a simple minimum Euclidean distance receiver operating with no information of the interfering links. With the help of the OIA, we show that this new receiver asymptotically achieves the channel capacity as the number of users increases. -
dc.identifier.bibliographicCitation IEEE TRANSACTIONS ON SIGNAL PROCESSING, v.62, no.11, pp.2922 - 2937 -
dc.identifier.doi 10.1109/TSP.2014.2319774 -
dc.identifier.issn 1053-587X -
dc.identifier.scopusid 2-s2.0-84901049676 -
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/4842 -
dc.identifier.url http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84901049676 -
dc.identifier.wosid 000336053300015 -
dc.language 영어 -
dc.publisher IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC -
dc.title Codebook-based opportunistic interference alignment -
dc.type Article -
dc.description.isOpenAccess FALSE -
dc.relation.journalWebOfScienceCategory Engineering, Electrical & Electronic -
dc.relation.journalResearchArea Engineering -
dc.description.journalRegisteredClass scie -
dc.description.journalRegisteredClass scopus -

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