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Electronics Letters

Issue 22 • Date October 25 2012

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Displaying Results 1 - 25 of 40
  • In Brief

    Publication Year: 2012, Page(s): 1374
    IEEE is not the copyright holder of this material | PDF file iconPDF (84 KB)
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  • Interview

    Publication Year: 2012, Page(s): 1374
    IEEE is not the copyright holder of this material | PDF file iconPDF (94 KB)
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  • Shaking it up

    Publication Year: 2012, Page(s): 1375
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (310 KB)

    Researchers at the University of Notre Dame in the US have developed an Er/Yb co-doped compound semiconductor native oxide that significantly enhances laser absorption efficiency, thus increasing the viability of realising a low-cost, monolithically-integrated wavelength amplifier with on-board pump laser source. View full abstract»

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  • Inside View

    Publication Year: 2012, Page(s): 1376
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (368 KB)

    An international team of researchers has developed a photonic sub-THz source with excellent signal quality, tunability and stability. Members of the Spanish arm of the team talk to us about the potential and challenges of photonic sub-THz generation View full abstract»

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  • Beamforming algorithm based on SPSA for mobile satellite receiver

    Publication Year: 2012, Page(s):1379 - 1380
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (204 KB)

    For the vehicle-mounted phased-array antenna in the mobile satellite receiver, a novel beamforming algorithm based on improved simultaneous perturbation stochastic approximation (SPSA) is developed. It estimates the gradient of the received signal power in the assured direction rather than fully isotropic by adding a fit searching direction. Besides the SPSA beamforming algorithm's merit, the prop... View full abstract»

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  • Compact ultra-wideband antenna with sharp band-notched characteristics for WiMax and WLAN

    Publication Year: 2012, Page(s):1380 - 1382
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (323 KB)

    A new design of a compact ultra-wideband antenna with sharp band-notched characteristics is presented. By utilising an interdigital capacitance loading loop resonator, the presented design has very high selectivity and achieves dual notches of the lower WLAN 5.25 GHz and upper WLAN 5.775 GHz bands, while it can still receive signals from the intermediate band between 5.35-5.725 GHz and effectively... View full abstract»

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  • Design of antenna with broadband and high gain at millimetre-wave band

    Publication Year: 2012, Page(s):1382 - 1383
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (393 KB)

    A new antenna structure with broadband and high gain at the millimetre-wave bands is presented. This antenna consists of a conventional patch and a new guard ring resonator. By introducing the guard ring resonator, the propagation of the surface wave is prevented, and antenna gain is increased. Furthermore, the bandwidth of this antenna becomes wider due to the coupling of the guard ring resonator... View full abstract»

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  • Dual-mode antenna for on-/off-body communications (10 MHz/2.45 GHz)

    Publication Year: 2012, Page(s):1383 - 1385
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (340 KB)

    A novel dual-mode antenna for on-body and off-body communications is proposed. In on-body mode, the antenna is similar to a pair of metal electrodes operating at 10 MHz and in off-body mode, with an L-shaped slit embedded, the antenna can cover the 2.45 GHz ISM band. Measured results, including received voltage at 10 MHz, reflection coefficient and radiation patterns in the 2.45 GHz ISM band are p... View full abstract»

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  • Dual-polarised patch antenna with wide bandwidth using electromagnetic feeds

    Publication Year: 2012, Page(s):1385 - 1386
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (353 KB)

    A compact dual-polarised patch antenna with wide impedance bandwidth is proposed. Two different feed mechanisms are designed to excite a dual orthogonal linearly-polarised mode from a single radiating patch. One of the two modes is excited by an electrically-coupled L-shaped probe while the other is excited by a magnetically-coupled loop. The L-shaped probe consists of a copper pin and a coupled s... View full abstract»

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  • Experimental knitted, textile frequency selective surfaces

    Publication Year: 2012, Page(s):1386 - 1388
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (230 KB)

    A new approach to the manufacture of conducting textiles for operation at microwave frequencies is reported. The technique investigated utilises a commercial flat-bed knitting process which is configured to use conducting yarns to produce large area, patterned, conducting textiles in an efficient manner which is amenable to mass production. The computerised flat-bed knitting system is used to manu... View full abstract»

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  • Reflectarray design using printed electronics technology

    Publication Year: 2012, Page(s):1388 - 1389
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (338 KB)

    A Ka-band reflectarray antenna with single sub-wavelength loop elements has been designed and fabricated using printed electronic technology. The reflectarray pattern is printed on a thin polyethylene terephthalate substrate using an inkjet printer with silver metal ink. The fabrication process and measurement results are reported. View full abstract»

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  • Robust adaptive beamforming based on iterative implementation of worst-case performance optimisation

    Publication Year: 2012, Page(s):1389 - 1391
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (230 KB)

    In the presence of large pointing error, an iterative worst-case performance optimisation based robust beamformer is proposed in a new perspective. Based on the relationship between the optimal weight vector and the steering vector (SV) of the Capon beamformer, the proposed approach can update the estimated desired SV through iterative computations with a small uncertainty set, and does not need a... View full abstract»

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  • Robustness analysis of Wang neural network for online linear equation solving

    Publication Year: 2012, Page(s):1391 - 1392
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (160 KB)

    The Wang neural network, which could be implemented into circuits, can solve online linear equations effectively and efficiently under the ideal noise-free condition. With the consideration of noises on coefficients and large implementation error, robustness analysis of such a model is presented with the upper boundary of the steady-state solution error also estimated. Illustrative examples demons... View full abstract»

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  • Dual positive feedback VCO with noise cancellation

    Publication Year: 2012, Page(s):1392 - 1394
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (333 KB)

    A low phase noise voltage controlled oscillator (VCO) is proposed by employing two positive feedback loops. One of them is used to enhance the output signal swing of the VCO while the other cancels the noise of active devices to reduce the noise contribution of those devices to the phase noise of the VCO. The proposed VCO is fabricated in a 0.18 μm 1P6M CMOS process. The measurement result ... View full abstract»

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  • Self-impedance calibrated PVT-insensitive pseudo open drain output driver without external resistors

    Publication Year: 2012, Page(s):1394 - 1395
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (349 KB)

    Proposed is a pseudo open drain output driver without external resistors. The resistance variation detector can reduce the cost and space of external resistors. The PVT variation detector is able to sense process, voltage and temperature conditions. The on-die termination impedance is constantly matched in response to the resistance, process, voltage and temperature conditions. The overall circuit... View full abstract»

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  • Digital predistortion based on multidimensional look-up table storing polynomial coefficients

    Publication Year: 2012, Page(s):1396 - 1397
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (160 KB)

    A digital predistortion (DPD) model constructed with a multidimensional look-up table storing groups of polynomial coefficients is proposed. Based on the current and previous input amplitude, the model selects the corresponding group of polynomial coefficients to calculate the DPD output. Experimental results are presented to demonstrate the effectiveness of the model. View full abstract»

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  • Efficient environment representation for mobile robot path planning using CVT-PRM with Halton sampling

    Publication Year: 2012, Page(s):1397 - 1399
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (250 KB)

    A centroidal Voronoi tessellation-based probabilistic roadmap (CVT-PRM) and its construction method for mobile robot path planning are introduced. The CVT-PRM efficiently encoded the entire unoccupied region of the environment by autonomously rearranging the positions of nodes via CVT and Halton sampling. Simulation results verified that the CVT-PRM can encode the entire unoccupied region efficien... View full abstract»

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  • Evaluation of eigenmode quality factor of large complex cavities based on PEC linear finite element formulation

    Publication Year: 2012, Page(s):1399 - 1401
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (183 KB)

    Finite conductivity losses of arbitrarily shaped and inhomogeneously loaded two- and three-dimensional structures are evaluated to a practical accuracy, solving a linear eigenproblem formulated on perfect electric conductors (PECs). This scheme mimics the analytical approach classically employed for canonically shaped waveguides and cavities. The normal electric and tangential magnetic modal field... View full abstract»

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  • Alternative method for binary shape alignment of non-symmetrical shapes based on minimal enclosing box

    Publication Year: 2012, Page(s):1401 - 1402
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (123 KB)

    Proposed is a novel method based on the minimal enclosing box (MEB) to determine the canonical orientation associated with a three-dimensional binary shape. It is suggested that, when the shape has no clear distinctive features and two or more of the eigenvalues are similar, this method is more suitable than the commonly used method based on principal component analysis (PCA). An experiment is per... View full abstract»

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  • Compressive sampling and wavelet-based multi-view image compression scheme

    Publication Year: 2012, Page(s):1403 - 1404
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (143 KB)

    A multi-view image codec using a disparity compensated lifting based wavelet transform and `compressive sampling (CS)` is presented. The input images are de-correlated into their sub-bands, using disparity compensated view filtering lifting based wavelet transforms. A wavelet transform is then applied to the baseband view, de-composing it into its sub-bands. High-frequency sub-bands are separately... View full abstract»

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  • Constant time O(1) image fog removal using lowest level channel

    Publication Year: 2012, Page(s):1404 - 1406
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (289 KB)

    In this reported work, the lowest level channel prior is proposed for image fog removal. The use of the lowest level channel is simplified from the dark channel prior. It is based on a key observation that fog-free intensity in a colour image is usually the minimum value of trichromatic channels. To estimate the transmission model, the dark channel prior then performs as a min filter for the lowes... View full abstract»

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  • Low-complexity iteration control algorithm for multi-rate partially parallel layered LDPC decoders

    Publication Year: 2012, Page(s):1406 - 1407
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (334 KB)

    Concurrent partially parallel syndrome computation reduces complexity but incurs increased error rates due to the hard decision flipping (HDF) problem. Proposed is a low-complexity iteration control algorithm (LC-ICA) that eliminates BER degradation. The HDF rate is also used to terminate undecodable blocks to further save iterations. The algorithm works over multiple code rates. The implementatio... View full abstract»

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  • Universum linear discriminant analysis

    Publication Year: 2012, Page(s):1407 - 1409
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (65 KB)

    Universum learning has been used for classification and clustering, and obtains favourable improvements with the help of Universum - the samples that do not belong to either class of interest. In this reported work, universum learning is extended to dimensionality reduction by incorporating it with linear discriminant analysis (LDA). However, for the C-class problem, LDA can get at most ... View full abstract»

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  • Capacitive proximity sensor with negative capacitance generation technique

    Publication Year: 2012, Page(s):1409 - 1411
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (125 KB)

    An oscillator-based capacitive proximity sensor is presented. To improve the sensor's sensitivity by minimising the effect of parasitic capacitance, the proposed sensor employs a negative capacitance generation technique. The sensor is implemented with a standard 0.18''m CMOS technology, and the measurement results show that frequency variation is about 1.4' at 5'cm distance while only consuming a... View full abstract»

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  • Miniaturised artificial magnetic conductors with wide split ring resonators and interdigital structures

    Publication Year: 2012, Page(s):1411 - 1412
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (459 KB)

    Miniaturised artificial magnetic conductors (AMCs) using wide split ring resonator (SRR) loadings and interdigital structures are proposed. Compared to an AMC with normal SRR loadings, an AMC with wide SRR loadings shows lower resonance frequency because of the increased capacitance. The insertion of interdigital structures at top patches and wide SRR loadings further decreases the resonance frequ... 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