Institution
NEC
Company•Tokyo, Japan•
About: NEC is a company organization based out in Tokyo, Japan. It is known for research contribution in the topics: Signal & Layer (electronics). The organization has 33269 authors who have published 57670 publications receiving 835952 citations. The organization is also known as: NEC Corporation & NEC Electronics Corporation.
Topics: Signal, Layer (electronics), Terminal (electronics), Base station, Transmission (telecommunications)
Papers published on a yearly basis
Papers
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NEC1
TL;DR: A QOS protection system can switch a current system and a reserved system depending upon degradation of quality through monitoring of the arriving condition of packet to perform transmission with guarantee of QOS as discussed by the authors.
Abstract: A QOS protection system can switch a current system and a reserved system depending upon degradation of quality through monitoring of arriving condition of packet to perform transmission with guarantee of QOS. The QOS protection system in a redundant system includes detection means for monitoring the packet flow and detecting at least the quality of degradation of the packet flow and switching means for performing switching between the current system and the reserved system when the detection means detects degradation of quality.
184 citations
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NEC1
TL;DR: In this article, a speech coding method in which spectrum parameters representing a spectrum envelope and a pitch parameter representing a pitch are obtained from an input discrete speech signal is presented. And a frame interval is divided into subintervals in accordance with the pitch parameter.
Abstract: A speech coding method in which spectrum parameter representing a spectrum envelope and a pitch parameter representing a pitch are obtained from an input discrete speech signal. A frame interval is divided into subintervals in accordance with the pitch parameter. A sound source signal in one of the subintervals is obtained by obtaining a multipulse with respect to a difference signal obtained by performing prediction on the basis of a past sound source signal. Correction information for correcting at least one of the amplitude and the phase of the sound source signal are obtained and output in other pitch intervals in the frame.
183 citations
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NEC1
TL;DR: In this article, a job generation unit calculates job characteristic information that allows estimation of an index value capable of indicating the amount of heat generated in the processing resources due to execution of the job.
Abstract: A job generation unit generates, from a source program, a job to be executed by any of a plurality of processing resources The job generation unit calculates job characteristic information that allows estimation of an index value capable of indicating the amount of heat generated in the processing resources due to execution of the job, and appends the job characteristic information to the job This makes it possible to estimate a temperature rise in a processing resource to which the job is allocated, by using a method that facilitates implementation in a system in which a scheduler allocates a job to a plurality of processing resources
183 citations
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NEC1
TL;DR: In this paper, the authors proposed a radio communication system consisting of an RFID tag used for identification, a reader/writer for performing transmission and reception of information between the RFID tags by radio waves, and a plurality of reflecting plates in a space.
Abstract: It is to provide a radio communication system capable of performing highly reliable reading/writing communication even though the RFID tags face in the random directions. The radio communication system comprises an RFID tag used for identification, a reader/writer for performing transmission and reception of information between the RFID tag by radio waves, and a plurality of reflecting plates in a space where a plurality of RFID tags are accumulated. The reflecting plates direct traveling direction of the radio wave irradiated from the reader/writer towards the RFID tags. A part of the radio waves irradiated from an antenna of the reader/writer is directed to travel three-dimensionally towards the space by the effect of the reflecting plates. Moreover, the radio waves traveling in the same direction among the reflected radio waves by the plurality of reflecting plates together allow attenuation caused due to distance to be reduced extremely.
183 citations
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TL;DR: This work uses a superconducting quantum circuit that includes Josephson qubits to control and measure the two resonators, and completely characterize the entangled states with bipartite Wigner tomography, demonstrating a significant advance in the quantum control of linear resonators insuperconducting circuits.
Abstract: Quantum entanglement, one of the defining features of quantum mechanics, has been demonstrated in a variety of nonlinear spinlike systems. Quantum entanglement in linear systems has proven significantly more challenging, as the intrinsic energy level degeneracy associated with linearity makes quantum control more difficult. Here we demonstrate the quantum entanglement of photon states in two independent linear microwave resonators, creating $N$-photon NOON states (entangled states $|N0⟩+|0N⟩$) as a benchmark demonstration. We use a superconducting quantum circuit that includes Josephson qubits to control and measure the two resonators, and we completely characterize the entangled states with bipartite Wigner tomography. These results demonstrate a significant advance in the quantum control of linear resonators in superconducting circuits.
182 citations
Authors
Showing all 33297 results
Name | H-index | Papers | Citations |
---|---|---|---|
Pulickel M. Ajayan | 176 | 1223 | 136241 |
Xiaodong Wang | 135 | 1573 | 117552 |
S. Shankar Sastry | 122 | 858 | 86155 |
Sumio Iijima | 106 | 633 | 101834 |
Thomas W. Ebbesen | 99 | 305 | 70789 |
Kishor S. Trivedi | 95 | 698 | 36816 |
Sharad Malik | 95 | 615 | 37258 |
Shigeo Ohno | 91 | 303 | 28104 |
Adrian Perrig | 89 | 374 | 53367 |
Jan M. Rabaey | 81 | 525 | 36523 |
C. Lee Giles | 80 | 536 | 25636 |
Edward A. Lee | 78 | 462 | 34620 |
Otto Zhou | 74 | 322 | 18968 |
Katsumi Kaneko | 74 | 581 | 28619 |
Guido Groeseneken | 73 | 1074 | 26977 |