Results 171 to 180 of about 2,034 (203)
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PDMA: A Probabilistic Framework for Diversifying Recommendation Lists
2015In this paper, we derive a probabilistic ranking framework for diversifying the recommendations of baseline methods. Unlike conventional approaches to balance relevance and diversity, we produce the diversified list by maximizing user’s current marginal aspect preference, thus avoiding the hyperparameters in making the tradeoff. Before diversification,
Yang-Hui Yan +2 more
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Resource Allocation in PDMA with Wireless Information and Power Transmission
2018 12th International Symposium on Medical Information and Communication Technology (ISMICT), 2018With the development of the fifth generation (5G) wireless systems, the mobile medical will face a profound change. Pattern division multiple access (PDMA) is a novel non-orthogonal multiple access scheme proposed to increase throughput and the number of connections by combining the design of transmitters and receivers.
Chang Wang +6 more
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Pattern Division Multiple Access (PDMA)
2018Pattern division multiple access (PDMA) is a kind of non-orthogonal multiple access technology based on the principle of the introduced reasonable diversity between multi-user and joint design between transmitter and receiver to promote the capacity.
Shanzhi Chen +3 more
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Power Allocation in PDMA Systems with Imperfect Channel State Information
2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall), 2019Pattern division multiple access (PDMA) is a multi- carrier non-orthogonal multiple access (NOMA), which can meet the requirements of massive user connections and super-high data rate in the fifth generation (5G) wireless networks. In this paper, we work on the optimization of power allocation to improve the performance in the down-link PDMA system ...
Mingyao Peng +3 more
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Throughput Analysis of PDMA/IRSA under Practical Channel Estimation
2019 IEEE 20th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), 2019Pattern division multiple access (PDMA) and irregular repetition slotted aloha (IRSA) are non-orthogonal multiple access (NOMA) protocols wherein packets are repeated across different resource elements. In this paper, first, the throughput of PDMA/IRSA is analyzed when common pilots are employed across users to facilitate channel estimation at the base
Chirag Ramesh Srivatsa +1 more
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Nano-hybrid self-crosslinked PDMA/silica hydrogels
Soft Matter, 2010We discovered that the free radical polymerization of N,N-dimethylacrylamide in water can lead, above a certain concentration, to gels without any added difunctional crosslinker. These so called “self-crosslinked” hydrogels were prepared and their weak mechanical properties were improved by introducing silica nanoparticles.
Carlsson, Linn +3 more
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Design of PDMA Communication System Based on OQAM-OFDM
2018 2nd IEEE Advanced Information Management,Communicates,Electronic and Automation Control Conference (IMCEC), 2018The conventional OFDM-based pattern division multiple access (PDMA) systems suffer from the problem of slow side-lobe attenuation. To alleviate this problem, we propose a new modulation waveform design, namely the offset quadrature amplitude modulation based orthogonal frequency division multiplexing (OQAM-OFDM).
Kai Li, Jue Wang, Chen Xu
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OTFS-PDMA Scheme With EPA-Based Receivers for High-Mobility IoT Networks
IEEE Transactions on Wireless CommunicationsHua Li, Caihong Gong, Shiya Hao
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Multiuser detection algorithm for PDMA uplink system based on SIC and MMSE
2016 IEEE/CIC International Conference on Communications in China (ICCC), 2016As the promising novel multiple access scheme for the 5th generation (5G) wireless communication system, pattern division multiple access (PDMA) technology can improve the spectral efficiency and support the massive connection based on the reasonable unequal diversity between users.
Dan Kong +4 more
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Energy efficient transmission in dynamic PDMA‐based systems with RF energy harvesting
Transactions on Emerging Telecommunications Technologies, 2020AbstractNonorthogonal multiple access (NOMA) and energy harvesting technologies are two promising approaches to increase spectral and energy efficiency, respectively. In this paper, a pattern division multiple access (PDMA) uplink transmission network in which users are able to harvest energy from the received radio frequency power is considered.
Akram Hooshiary +2 more
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