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Sensors, Volume 18, Issue 2

February 2018 - 362 articles

Cover Story: Pec and co-workers report a random access preamble (RAP) design technique for underwater acoustic cellular systems. After showing that the conventional RAP used in long term evolution (LTE) systems is not appropriate for underwater acoustic cellular systems, two different types of RAPs (RAP 1 and RAP 2) are proposed to detect the identity of underwater equipment/nodes (UE) and estimate the time delay between a UE and an underwater base station at the physical layer. The performance of RAP detection is investigated by analyzing the detection probabilities and false alarm probabilities of RAP 1 and RAP 2 in a Doppler environment. By evaluating the performances of RAP 1 and RAP 2 in various situations, it was concluded that RAP 2 is more suitable for underwater acoustic cellular systems. The AF and CAF analytically obtained in this paper are shown to be similar to those obtained using experimental data. View this paper
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Articles (362)

  • Article
  • Open Access
24 Citations
6,108 Views
15 Pages

Estimation of Handgrip Force from SEMG Based on Wavelet Scale Selection

  • Kai Wang,
  • Xianmin Zhang,
  • Jun Ota and
  • Yanjiang Huang

24 February 2018

This paper proposes a nonlinear correlation-based wavelet scale selection technology to select the effective wavelet scales for the estimation of handgrip force from surface electromyograms (SEMG). The SEMG signal corresponding to gripping force was...

  • Article
  • Open Access
3 Citations
4,515 Views
14 Pages

24 February 2018

Social applications play a very important role in people’s lives, as users communicate with each other through social networks on a daily basis. This presents a challenge: How does one receive high-quality service from social networks at a low cost?...

  • Article
  • Open Access
15 Citations
6,286 Views
9 Pages

24 February 2018

A high-speed interrogation scheme for large-scale fiber Bragg grating (FBG) sensing arrays is presented. This technique employs parallel computing and pipeline control to modulate incident light and demodulate the reflected sensing signal. One Electr...

  • Article
  • Open Access
22 Citations
6,142 Views
16 Pages

24 February 2018

With the growing number of vehicles and popularity of various services in vehicular cloud computing (VCC), message exchanging among vehicles under traffic conditions and in emergency situations is one of the most pressing demands, and has attracted s...

  • Article
  • Open Access
19 Citations
6,673 Views
13 Pages

24 February 2018

Phosphors based on magnesium titanate activated with Mn 4 + ions are of great interest because, when excited with blue light, they display a strong red-emitting luminescence. They are characterized by a luminescence decay which is strongly...

  • Article
  • Open Access
21 Citations
11,305 Views
8 Pages

Second Generation Small Pixel Technology Using Hybrid Bond Stacking

  • Vincent C. Venezia,
  • Alan Chih-Wei Hsiung,
  • Wu-Zang Yang,
  • Yuying Zhang,
  • Cheng Zhao,
  • Zhiqiang Lin and
  • Lindsay A. Grant

24 February 2018

In this work, OmniVision’s second generation (Gen2) of small-pixel BSI stacking technologies is reviewed. The key features of this technology are hybrid-bond stacking, deeper back-side, deep-trench isolation, new back-side composite metal-oxide grid,...

  • Article
  • Open Access
13 Citations
6,514 Views
10 Pages

24 February 2018

This paper presents a single-bit CMOS image sensor (CIS) that uses a data processing technique with an edge detection block for simple iris segmentation. In order to recognize the iris image, the image sensor conventionally captures high-resolution i...

  • Article
  • Open Access
12 Citations
6,713 Views
12 Pages

Error Analysis of the K-Rb-21Ne Comagnetometer Space-Stable Inertial Navigation System

  • Qingzhong Cai,
  • Gongliu Yang,
  • Wei Quan,
  • Ningfang Song,
  • Yongqiang Tu and
  • Yiliang Liu

24 February 2018

According to the application characteristics of the K-Rb-21Ne comagnetometer, a space-stable navigation mechanization is designed and the requirements of the comagnetometer prototype are presented. By analysing the error propagation rule of the space...

  • Article
  • Open Access
46 Citations
6,243 Views
17 Pages

Study of Impact Damage in PVA-ECC Beam under Low-Velocity Impact Loading Using Piezoceramic Transducers and PVDF Thin-Film Transducers

  • Baoxin Qi,
  • Qingzhao Kong,
  • Hui Qian,
  • Devendra Patil,
  • Ing Lim,
  • Mo Li,
  • Dong Liu and
  • Gangbing Song

24 February 2018

Compared to conventional concrete, polyvinyl alcohol fiber reinforced engineering cementitious composite (PVA-ECC) offers high-strength, ductility, formability, and excellent fatigue resistance. However, impact-induced structural damage is a major co...

  • Article
  • Open Access
80 Citations
10,007 Views
15 Pages

24 February 2018

Frequent checks on livestock’s body growth can help reducing problems related to cow infertility or other welfare implications, and recognizing health’s anomalies. In the last ten years, optical methods have been proposed to extract information on va...

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Sensors - ISSN 1424-8220