Results 131 to 140 of about 1,263 (169)

Downlink PDMA in the Heterogeneous Network

2017
Non-orthogonal multiple access (NOMA) is considered as a promising multiple access technology, which could satisfy various incremental requirements of the coming fifth generation (5G) mobile communication system. As a novel NOMA scheme based on the joint design of the transmitter and receiver, pattern division multiple access (PDMA) could enhance ...
Jie Zeng 0001, Xiaofeng Lin, Liping Rong, Xin Su 0001   +3 more
openaire   +1 more source

Phase Division Multiple Access (PDMA)

2015 IEEE International Conference on Electro/Information Technology (EIT), 2015
Phase Division Multiple Access (PDMA) is a coded Multi Phase Shift Keying modulation technique, where multiple users have access to the same carrier frequency through the phase constellation. In the proposed scheme, the input digital signal is mapped into a block of orthogonal codes. The encoded data, which is in orthogonal space, modulates the carrier
openaire   +1 more source

PDMA: A Probabilistic Framework for Diversifying Recommendation Lists

2015
In 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, Ying-Min Zhou, Hai-Tao Zheng 0002   +2 more
openaire   +1 more source

Resource Allocation in PDMA with Wireless Information and Power Transmission

2018 12th International Symposium on Medical Information and Communication Technology (ISMICT), 2018
With 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, Jie Zeng 0001, Bei Liu 0002, Mingyao Peng, Xin Su 0001, Shihai Shao, Qi Liu   +6 more
openaire   +1 more source

Pattern Division Multiple Access (PDMA)

2018
Pattern 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, Shaohui Sun, Shaoli Kang, Bin Ren   +3 more
openaire   +1 more source

Throughput Analysis of PDMA/IRSA under Practical Channel Estimation

2019 IEEE 20th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), 2019
Pattern 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, Chandra R. Murthy   +1 more
openaire   +1 more source

Power Allocation in PDMA Systems with Imperfect Channel State Information

2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall), 2019
Pattern 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, Jie Zeng 0001, Xin Su 0001, Bei Liu 0002   +3 more
openaire   +1 more source

Design of PDMA Communication System Based on OQAM-OFDM

2018 2nd IEEE Advanced Information Management,Communicates,Electronic and Automation Control Conference (IMCEC), 2018
The 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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Nano-hybrid self-crosslinked PDMA/silica hydrogels

Soft Matter, 2010
We 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, Rose, Séverine, Hourdet, Dominique, Marcellan, Alba   +3 more
openaire   +2 more sources

Multiuser detection algorithm for PDMA uplink system based on SIC and MMSE

2016 IEEE/CIC International Conference on Communications in China (ICCC), 2016
As 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, Jie Zeng 0001, Xin Su 0001, Liping Rong, Xibin Xu   +4 more
openaire   +1 more source