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Low-Latency Multiuser Two-Way Wireless Relaying for Spectral and Energy Efficiencies

Author(s): Sheng, Zhichao; Tuan, Hoang Duong; Duong, Trung Q; Poor, H Vincent; Fang, Yong

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dc.contributor.authorSheng, Zhichao-
dc.contributor.authorTuan, Hoang Duong-
dc.contributor.authorDuong, Trung Q-
dc.contributor.authorPoor, H Vincent-
dc.contributor.authorFang, Yong-
dc.identifier.citationSheng, Zhichao, Tuan, Hoang Duong, Duong, Trung Q, Poor, H Vincent, Fang, Yong. (2018). Low-Latency Multiuser Two-Way Wireless Relaying for Spectral and Energy Efficiencies. IEEE Transactions on Signal Processing, 66 (16), 4362 - 4376. doi:10.1109/tsp.2018.2847626en_US
dc.description.abstractThis paper considers two possible approaches, which enable multiple pairs of users to exchange information via multiple multiantenna relays within one time-slot to save communication bandwidth in low-latency communications. The first approach is to deploy full-duplexes for both users and relays to make their simultaneous signal transmission and reception possible. In the second approach, the users use a fraction of a time slot to send their information to the relays and the relays use the remaining complementary fraction of the time slot to send the beamformed signals to the users. The inherent loop self-interference in the duplexes and inter-full-duplexing-user interference in the first approach are absent in the second approach. Under both these approaches, the joint design of the users' power allocation and relays' beamformers to either optimize the users' exchange of information or maximize the energy-efficiency subject to user quality-of-service (QoS) constraints in terms of minimal rate thresholds leads to complex nonconvex optimization problems. Path-following algorithms are developed for their computational solutions. Numerical examples show the advantages of the second approach over the first approach.en_US
dc.format.extent4362 - 4376en_US
dc.relation.ispartofIEEE Transactions on Signal Processingen_US
dc.rightsAuthor's manuscripten_US
dc.titleLow-Latency Multiuser Two-Way Wireless Relaying for Spectral and Energy Efficienciesen_US
dc.typeJournal Articleen_US

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