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Electronics Letters

Issue 15 • Date July 22 2010

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Displaying Results 1 - 25 of 34
  • In brief

    Publication Year: 2010, Page(s): 1040
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (96 KB)

    First Page of the Article
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  • A quicker route

    Publication Year: 2010, Page(s): 1040
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (195 KB)

    Significantly faster low-cost navigation systems could be on the horizon with the first real-time implementation of a 3D reduced inertial sensors system/global positioning system (RISS/GPS) navigation algorithm on a real-time embedded system. A team from Queen¿s University and the Royal Military College in Canada used a mixture particle filter approach to enhance the performance and reduce the co... View full abstract»

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  • Interview

    Publication Year: 2010, Page(s): 1041
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (219 KB)

    I??m an 'old timer'. I was researching 3DTV in the 1980s. We trialled a system in Germany, an 'anaglyph' system with red and cyan as the complementary colour casts of the L and R pictures, combined in the broadcast PAL picture. We sold (yes, sold) over six million pairs of glasses for the fi rst live broadcast from the NDR studios in Hamburg. The viewers saw a monochrome 3D picture full of maids p... View full abstract»

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  • Tapping the brain

    Publication Year: 2010, Page(s): 1042
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (320 KB)

    Researchers at the University of California San Diego (UCSD) have built a brain¿ computer interface (BCI) system that uses a computer monitor¿s refresh rate to produce visual stimuli at varying frequencies. Their BCI design, in which the user controls a virtual keyboard, looks promising as a practical solution that will allow patients with motor diseases to communicate with other people or their... View full abstract»

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  • Model behaviour for 3D-HDTV

    Publication Year: 2010, Page(s):1045 - 1047
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (132 KB)

    3D occupies the unique position of being both the latest and the oldest technology in digital television. After short periods in the 1920s, 1950s and 1980s, it is set today to provide the next wave of both digital broadcast television and packaged media. Tools to help the standardisation and choice of 3D television are outlined. Today, only `plano-stereoscopic` television systems are practical, bu... View full abstract»

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  • 60 GHz beamforming using in-package bondwire antenna array

    Publication Year: 2010, Page(s):1047 - 1048
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (354 KB)

    An antenna array using in-package bondwire to perform beamforming for 60 GHz applications is presented. 1 mil gold bondwire designed to resonate at 60 GHz was employed as an antenna array to provide smaller area and a cheaper way to manufacture it. The overall size of the bondwire antenna array on a CMOS chip is 1 3 mm2 and its radiation pattern shows fair agreement with simulation resu... View full abstract»

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  • High-gain dual-polarised planar slot array for WLAN applications

    Publication Year: 2010, Page(s):1048 - 1050
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (215 KB)

    A high-gain dual-polarised planar etched slot array for use in wireless local area networks (WLAN) is presented. Two sets of four collinear slots are used as radiators for each polarisation. Each set of four collinear slots is constructed as a centre-fed long slotline, with etched crossovers to split the slotline into four resonant and in-phase halfwavelength slots. A reflector etched on a separat... View full abstract»

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  • Bandwidth enhancement of CPW fed tapered slot antenna with multi-transformation characteristics

    Publication Year: 2010, Page(s):1050 - 1051
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (284 KB)

    Proposed is a novel method to improve the bandwidth of a coplanar waveguide (CPW) fed tapered slot antenna (TSA) using a stub with multi-transformation characteristics for ultra-wideband applications. By inserting multipaths inside a conventional circular slotline open stub, the necessary condition for multi-transformation characteristics for bandwidth enhancement is fulfilled. To verify this char... View full abstract»

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  • Printed MIMO antenna system of four closely-spaced elements with large bandwidth and high isolation

    Publication Year: 2010, Page(s):1052 - 1053
    Cited by:  Papers (13)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (237 KB)

    A compact wideband printed MIMO antenna system (of four elements) with high isolation is presented. The proposed MIMO antenna system with an overall lateral size of only 0.43λ× 0.43λ can offer 22.8% bandwidth (1.63-2.05 GHz) and isolation of better than 24 dB. The measured gain is larger than 2.72 dBi over the whole band, and the calculated envelope correlation coefficient is ... View full abstract»

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  • Tunable SIW cavity backed active antenna oscillator

    Publication Year: 2010, Page(s):1053 - 1055
    Cited by:  Papers (30)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (224 KB)

    A substrate integrated waveguide (SIW) cavity backed active slot antenna oscillator is proposed, the operation frequency of which can be tuned by means of a properly connected varactor. The cavity backed structure permits overcoming potential problems such as heat dissipation and unwanted surface wave modes in large array implementations, and may provide better phase noise performance. The use of ... View full abstract»

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  • Time-varying channel neural equalisation using Gauss-Newton algorithm

    Publication Year: 2010, Page(s):1055 - 1056
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (161 KB)

    Artificial neural network techniques have become very common as equalisation solutions in several types of communication channels. These neural networks are presented in many topologies. The suitable choice of a topology for equalisation purpose depends on different criteria such as: convergence rate, bit error rate, computational complexity, among many others. Reported is an investigation into th... View full abstract»

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  • Visual stimulus design for high-rate SSVEP BCI

    Publication Year: 2010, Page(s):1057 - 1058
    Cited by:  Papers (30)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (181 KB)

    A new approach to realise computer monitor flickers that can be used to elicit steady-state visual evoked potentials (SSVEP) at a flexible frequency is proposed. An SSVEP-based brain-computer interface (BCI) with 16 targets was then implemented using the proposed method. In an online test on three subjects, a high information transfer rate of 75.4 bits/min was achieved. View full abstract»

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  • Compact trajectory-based behavioural models for analogue circuits

    Publication Year: 2010, Page(s):1058 - 1060
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (218 KB)

    A technique for automated generation of compact behavioural models is presented. The extracted models are capable of capturing highly nonlinear systems with good accuracy. The proposed technique is an extension to the well known trajectory-based piecewise models, where local expansions of the state trajectory are stitched together using weighting functions. This idea is combined with response surf... View full abstract»

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  • Illumination normalisation for face recognition in transformed domain

    Publication Year: 2010, Page(s):1060 - 1061
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (59 KB)

    Proposed is an illumination normalisation approach based on the block-wise Walsh-Hadamard transform (WHT) for face recognition under illumination variations. An appropriate number of low-frequency WHT coefficients is zeroed to compensate for illumination variations. Experimental studies demonstrate that the proposed method outperforms the discrete cosine transform in the cases with larger illumina... View full abstract»

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  • NLM algorithm with weight update

    Publication Year: 2010, Page(s):1061 - 1063
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (236 KB)

    The nonlocal means (NLM) filter is one of the most popular denoising approaches and there have been many improvements regarding its weight function and parameter optimisation. However, those improvements have not removed artifacts such as the false texture pattern, which occurs when the smoothing parameter in the weight function is small. The smoothness in the flat region and the sharpness in the ... View full abstract»

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  • Polar representation of covariance descriptors for circular features

    Publication Year: 2010, Page(s):1063 - 1064
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (318 KB)

    The use of polar representation of covariance descriptors, suitable for the classification of circular feature sets, is proposed. It overcomes the implicit limits of state-of-the-art methods based on axis-oriented rectangular patches. The suitability of the proposed solution is verified on two case studies, namely head detection and polymer classification in photomicrograph contexts. View full abstract»

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  • Robust high-order matched filter for hyperspectral target detection

    Publication Year: 2010, Page(s):1065 - 1066
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (96 KB)

    A robust high-order matched filter (RHMF) for automatic target detection in hyperspectral images is proposed. The classical detection methods mainly focus on second-order statistics and do not take intrinsic uncertainty or variability of target spectral signatures into account. For automatic target detection in a hyperspectral image, most interesting targets usually occur with low probabilities an... View full abstract»

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  • Visual saliency detection in image using ant colony optimisation and local phase coherence

    Publication Year: 2010, Page(s):1066 - 1068
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (104 KB)

    A new visual saliency detection approach is proposed. The proposed approach exploits the ant colony optimisation technique to measure the image's saliency via depositing the pheromone (through ants' movements) on the image. Furthermore, the ants' movements are steered by the local phase coherence of the image. Experimental results are presented to demonstrate the performance of the proposed approa... View full abstract»

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  • Quaternary sequences with odd period and low autocorrelation

    Publication Year: 2010, Page(s):1068 - 1069
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (67 KB)

    Several new classes of balanced quaternary sequences of odd period have been constructed by using inverse Gray mapping and binary sequences with three autocorrelation values. The maximum nontrivial autocorrelations of the constructed sequences are shown to be √5, which reach the best known maximum nontrivial autocorrelation for quaternary sequences of odd period. View full abstract»

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  • Quadratic dependence on temperature of Cs 0-0 hyperfine resonance frequency in single Ne buffer gas microfabricated vapour cell

    Publication Year: 2010, Page(s):1069 - 1071
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (104 KB)

    Presented is the observation of a quadratic temperature dependence of the Cs 0-0 ground state hyperfine resonance frequency in a single Neon (Ne) buffer gas vapour microcell. The inversion temperature, expected to be theoretically independent of the buffer gas pressure, is measured to be about 80-C for two different samples. A proposal to develop chip scale atomic clocks with improved long-term fr... View full abstract»

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  • Limitations for transmission of photonic qubits in optical fibres carrying telecom traffic

    Publication Year: 2010, Page(s):1071 - 1072
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (129 KB)

    Practical limitations are discussed for the exchange of photonic qubits in optical fibres carrying telecom traffic based on the noise generated by Raman spontaneous scattered photons from the classical signals. It is shown that these limitations are in the co- and counter-propagating directions with respect to the classical channels. View full abstract»

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  • Low-frequency optical noise generator using fractional statistics

    Publication Year: 2010, Page(s):1072 - 1074
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (194 KB)

    A design for a low-frequency 1/f optical noise generator using fractional statistics is proposed and demonstrated for the first time. The 1/f noise samples were obtained by transformation functions performed on pseudorandom binary sequences that modulate a laser source. The 1/f spectrum representation of the optical noise samples shows that this proposition is very promising f... View full abstract»

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  • Magnetostatic bistable MEMS switch with electrothermal actuators

    Publication Year: 2010, Page(s):1074 - 1075
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (499 KB)

    The design, fabrication, and an experiment, of a bistable MEMS switch with magnetostatic latching and electrothermal actuation for achieving lower power consumption are presented. The bistabilities feature a crisscross-shaped torsion/cantilever beam system and a permanent magnet for holding the closed state. Therefore, the device is suitable for bistable switching relay applications. Electrical pe... View full abstract»

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  • Distributed feedback laser employing buried GaAs/InGaP index-coupled grating

    Publication Year: 2010, Page(s):1076 - 1077
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (196 KB)

    The realisation of a GaAs-based distributed feedback laser based upon regrowth of standard AlGaAs upper cladding upon patterned InGaP is presented. Regrowth upon exposed AlGaAs surfaces during its fabrication is avoided. Gratings technology is applied to an In0.17Ga0.83As double quantum well laser emitting at 1 μm and demonstrates ~30 dB sidemode suppression with as-cl... View full abstract»

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  • High-index-contrast ridge waveguide laser with thermally oxidised etched facet and metal reflector

    Publication Year: 2010, Page(s):1077 - 1078
    Cited by:  Papers (2)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (289 KB)

    A novel GaAs-based high-index-contrast ridge waveguide quantum well heterostructure laser is demonstrated, which features an etched and wet thermally oxidised rear facet with a deposited metal mirror suitable for wafer scale integration. The self-aligned fabrication process utilises a single deep etch step and oxygen-enhanced non-selective wet oxidation of the AlGaAs heterostructure ridge sidewall... View full abstract»

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Aims & Scope

Electronics Letters is internationally renowned for its rapid communication of new developments and emerging topics across the broad and interdisciplinary field of modern electronics and electrical engineering.

Full Aims & Scope

Meet Our Editors

Editors-in-Chief

Professor Chris Toumazou
Director of the Biomedical Institute
Imperial College, London, UK

Professor Ian White
Head of Photonics Research
University of Cambridge, UK