Results 171 to 180 of about 2,416 (202)
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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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Three Dimensional PDMA Assembly: Design, Process, and Applications
Microelectromechanical Systems, 2002This paper discusses a recent three-dimensional assembly process called the Plastic Deformation Magnetic Assembly (PDMA) method. The PDMA method allows three dimensional micromechanical structures to be realized efficiently using surface micromachining and wafer-scale, post-sacrificial-release assembly. We will discuss the principle of the PDMA method,
C. Liu, J. Chen, J. Zou, Z. Fan
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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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A New Uplink Channel Estimation Architecture for Massive MIMO Systems with PDMA
2019 IEEE 13th International Conference on ASIC (ASICON), 2019Massive multiple input multiple output (MIMO) with millimeter-wave (mmWave) techniques is favored by next-generation communication systems for its higher data rates, and higher spectral energy efficiency. Considering the dual-wideband effect existing in the large-scale antenna arrays, a new architecture for uplink (UL) channel estimation based on path ...
Zhenhao Ji +5 more
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Pattern division multiple access (PDMA) for cellular future radio access
2015 International Conference on Wireless Communications & Signal Processing (WCSP), 2015This paper presents a pattern division multiple access (PDMA) concept for cellular future radio access (FRA) towards the 2020s information society. Different from the current LTE radio access scheme (until Release 11), PDMA is a novel non-orthogonal multiple access technology based on the total optimization of multiple user communication system.
Jie Zeng 0001 +4 more
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PDMA-1: chaotic communication via the extended Kalman filter
IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications, 1998A method of synchronizing two chaotic systems by implementing an extended Kalman filter (EKF) as part of the receiver is presented. Communication is accomplished by parameter modulation in the transmitter and parameter estimation in the receiver filter and tolerates nontrivial parameter mismatches as well as additive noise.
D.J. Sobiski, J.S. Thorp
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The PDMA ToolBook 3 for New Product Development
2007Contributors. Introduction. Part 1 Tools for Engineering and Design. 1 TRIZ: The Theory of Inventive Problem Solving (Gunter R. Ladewig). 2 Quality Function Deployment and the House of Quality (Gerry Katz). Part 2 Tools To Improve Customer And Market Inputs To NPD.
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Iterative Receiver for Uplink MIMO-PDMA System and Its Optimization
IEEE Transactions on Vehicular Technology, 2023Qingqing Liu +5 more
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