1,720,972 research outputs found
SIMD processor-based turbo decoder supporting multiple third-generation wireless standards
No full textA programmable turbo decoder is designed to support multiple third-generation wireless communication standards. We propose a hybrid architecture of hardware and software, which has small size, low power, and high performance like. hardware implementations, as well as the flexibility and programmability of software. It mainly consists of a configurable hardware soft-input-soft-output (SISO) decoder and a 16-b single-instruction multiple-data processor, which is equipped with five processing elements and special instructions customized for interleaving in order to provide interleaved data at the speed of the hardware SISO. A fast and flexible software implementation of the block interleaving algorithm is also proposed. The interleaver generation is split into two parts, preprocessing and on-the-fly generation, to reduce the timing overhead of changing the interleaver structure. We present detailed descriptions of the interleaving implementation applied to the W-CDMA and cdma2000 standard turbo codes. The decoder occupies 8.90 mm(2) in a 0.25-mu m CMOS with five metal layers and exhibits the maximum decoding rate of 5.48 Mb/s.This work
was supported in part by the Institute of Information Technology Assessment
through the ITRC and IC Design Education Center (IDEC)
Processor-based turbo interleaver for multiple third-generation wireless standards
No full textA software, turbo interleaver running. on,. a SIMD processor is presented for a turbo decoder supporting multiple 3G 3G wireless standards. To hide the timing overhead of interleaver changing, the interleaver generation is split into two parts, preprocessing and incremental on-the-fly generation. Applying the proposed approach, we implemented a W-CDMA and cdma2000 interleaver that generates one interleaved. address per cycle and occupies 10% area of the ROM implementation.This work was supported in part by the Korea Science and Engineering Foundation
through the MICROS Center, and by the Ministry of Science and Technology
and the Ministry of Commerce, Industry and Energy through the Project
System IC 2010
In situ biochemical reduction of interference in an amperometric biosensor with a novel heterobilayer configuration of polypyrrole glucose oxidase horseradish peroxidase
No full textA novel heterobilayer configuration for in situ biochemical reduction of interference in the amperometric glucose biosensor is described. The heterobilayer biosensor was constructed by electrochemical formation of a polypyrrole film in the presence of horseradish peroxidase (HRP) on top of an immobilized glucose oxidase (GO) film. In the heterobilayer configuration, electro-oxidizible compounds such as ascorbate, urate and acetaminophen, which severely interfere with the amperometric detection, were oxidized by the catalytic reaction of horseradish peroxidase before reaching the electrode surface. As a source of hydrogen peroxide required for the preoxidation of interferents, a portion of diffusing-away hydrogen peroxide produced by glucose oxidase, was utilized without any external supply. Preparation conditions for the heterobilayer biosensor were optimized in terms of sensitivity for glucose and the reduction of interference. The biosensor showed a good suppression of interference and a negligible deviation (less than 5%) in the amperometric detection, especially when the glucose concentration was higher than 50 mM
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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