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Electronics Letters

Issue 7 • March 27 2014

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Displaying Results 1 - 25 of 49
  • In brief

    Publication Year: 2014, Page(s): 498
    IEEE is not the copyright holder of this material | PDF file iconPDF (2718 KB)
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  • Interview

    Publication Year: 2014, Page(s): 478
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2591 KB)

    "In my opinion, wearable and implantable micro-sensors are one of the key points for developments in mobile health" View full abstract»

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  • Harmonic modes

    Publication Year: 2014, Page(s): 479
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2749 KB)

    Presents the first report of self-mode-locking to the third harmonic of a VECSEL without a saturable absorber. View full abstract»

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  • Nano scale, mega scope

    Publication Year: 2014, Page(s): 480
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2698 KB)

    A common type of multi-layer ceramic capacitor displays very good, almost hysteresis-free characteristics as a micro-actuator. The industrial grade MLCCs tested could be of interest in applications including nanopositioning for scanning probe microscopes. View full abstract»

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  • Band-notched UWB rectangular dielectric resonator antenna

    Publication Year: 2014, Page(s):483 - 484
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (403 KB)

    A new ultra-wideband (UWB) rectangular dielectric resonator antenna (DRA) with band-stop performance is proposed. Two symmetrical short-circuited strips together with a slot etched in the feeding patch are introduced to form the notched band. The design principles of the proposed methods are described in detail. The measured result demonstrates that the proposed DRA achieves an UWB bandwidth from ... View full abstract»

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  • Compact triple-band antenna for WiMAX and WLAN applications

    Publication Year: 2014, Page(s):484 - 486
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (328 KB)

    A triple-band planar antenna with a compact radiator is proposed for 2.3/3.5/5.5 GHz WiMAX and 5.2/5.8 GHz WLAN applications simultaneously. The proposed antenna consists of an inverted-L (IL)-shaped radiating element and a parasitic element in the ground plane to generate three resonant modes for triple-band operations. Each of the three resonant bands can be tuned separately to cover other wirel... View full abstract»

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  • Relaxing CFL limit of FDTD by DWT

    Publication Year: 2014, Page(s):486 - 488
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (280 KB)

    To extend the Courant-Friedrichs-Lewy (CFL) limit, a discrete wavelet transform (DWT) is incorporated into the finite difference time domain (FDTD) scheme. With the Mallat algorithm for the decomposition and reconstruction of the electromagnetic components, the unstable spatial modes can be efficiently filtered out. Consequently, the original strict CFL limit of the FDTD can be significantly relax... View full abstract»

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  • Slotted substrate integrated cavity antenna using TE330 mode with low profile and high gain

    Publication Year: 2014, Page(s):488 - 490
    Cited by:  Papers (10)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (549 KB)

    A novel slotted cavity antenna based on substrate integrated waveguide (SIW) technology using TE330 mode is presented for the first time. The SIW-based cavity operating at TE330 mode is simply fed by a coaxial probe. Energy is coupled out of the cavity by a 3 × 3 slot array etched on the top surface of the cavity. An antenna prototype operating at WLAN 5.8 GHz band fab... View full abstract»

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  • Smart antennas aided wideband detection for spectrum sensing in cognitive radio networks

    Publication Year: 2014, Page(s):490 - 492
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (192 KB)

    A smart antennas assisted wideband spectrum sensing algorithm for cognitive radios is presented. The proposed method operates simultaneously over the total wideband channels rather than one single channel each time. In this approach, the wideband spectrum sensing issue is transformed into estimating the number of occupied channels based on the Hannan-Quinn criterion, and then determining the occup... View full abstract»

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  • Memristor-based neuron circuit and method for applying learning algorithm in SPICE?

    Publication Year: 2014, Page(s):492 - 494
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (288 KB)

    The learning of nonlinearly separable functions in cascaded memristor crossbar circuits is described and the feasibility of using them to develop low-power neuromorphic processors is demonstrated. This is the first study evaluating the training of memristor crossbars through SPICE simulations. It is important to capture the alternate current paths and wire resistance inherent in these circuits. Th... View full abstract»

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  • Human hand compatible underactuated exoskeleton robotic system

    Publication Year: 2014, Page(s):494 - 496
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (330 KB)

    A novel direct-driven and portable exoskeleton robotic system for the hand is proposed. The system design is based on the multi-parametric optimisation procedure, which considers isotropy, dexterity and exertion of perpendicular forces on the finger phalanges. Actuators for the proposed device were selected based on results of experiments with users having different hand sizes. These experiments m... View full abstract»

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  • Radiofrequency inductive probe for non-contact dielectric characterisations of organic medium

    Publication Year: 2014, Page(s):496 - 497
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (193 KB)

    A high sensitivity radiofrequency (RF) probe dedicated to contactless dielectric characterisations is presented. A method for the impedance measurement of a distant RF resonator is first proposed. The method is evaluated as a function of the measurement distance starting from experiments. The obtained results enable assessment of the accuracy of the method and optimisation of its implementation. View full abstract»

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  • Oversampled ADC based on pulse frequency modulator and TDC

    Publication Year: 2014, Page(s):498 - 499
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (344 KB)

    Oversampled converters based on voltage controlled ring oscillators are an attractive solution because of their digital implementation and simplicity. However, the voltage-to-frequency conversion of ring oscillators displays a poor linearity. Replacing the ring oscillator by a pulse frequency modulator (PFM) that provides improved linearity at the expense of feedback and analogue amplification is ... View full abstract»

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  • Energy-efficient high-accuracy switching method for SAR ADCs

    Publication Year: 2014, Page(s):499 - 501
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (265 KB)

    A new tri-level switching method for successive approximation register (SAR) analogue-to-digital converters (ADCs) is presented. The proposed switching method enhances the efficiency of digital-to-analogue converter switching energy by 93.7% and achieves a 75% reduction in the total capacitor size, compared with the conventional SAR ADC. In addition, the accuracy of the proposed SAR ADC has no dep... View full abstract»

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  • FIR-IIR adaptive filters hybrid combination

    Publication Year: 2014, Page(s):501 - 503
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1244 KB)

    To enhance the performance in IIR system identification scenarios, a hybrid combination of FIR and IIR adaptive filters (AFs) via a supervisor that senses which one is performing best is proposed. The FIR-LMS AF is short, providing fast and robust convergence, whereas the IIR-LMS AF is slow but accurate. The stagnation effect caused by the different convergence rates is tackled through cyclic weig... View full abstract»

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  • LUT-oriented dual-rail quasi-delayinsensitive logic synthesis

    Publication Year: 2014, Page(s):503 - 505
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (228 KB)

    The method of quasi-delay-insensitive logic synthesis using look-up tables (LUTs) is described. It is shown that the dual-rail sum-of-minterm function hazard-free implementation can be done using a single LUT. Namely, instead of the conventional approach based on a DIMS representation where each minterm is implemented on a C-element, the whole sum-of-minterm function is mapped into the single C-el... View full abstract»

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  • Threshold-voltage-difference-based CMOS voltage reference derived from basic current bias generator with 4.3 ppm°C temperature coefficient

    Publication Year: 2014, Page(s):505 - 507
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (411 KB)

    A threshold-voltage-difference-based CMOS voltage reference topology derived from the basic current bias generator is proposed. The implementation in the GSMC 0.18 μm process demonstrated that a precise voltage of 516.3 mV can be generated with a minimal temperature coefficient of 4.3 ppm/°C. The reference consumes a current of 1.9 μA with a minimum supply voltage of 1.4 V. Th... View full abstract»

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  • Edge skip intra coding method for depth coding

    Publication Year: 2014, Page(s):507 - 508
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (197 KB)

    An efficient intra coding method is presented for depth coding, namely edge skip. In the proposed method, the depth edge macro-block (MB) is skipped without coding. At the decoder side, the edge MB is reconstructed with the reference samples of the adjacent left and above lines, and the associated partitioning information. The partitioning information is derived from the co-located area in the cor... View full abstract»

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  • Image quality assessment scheme with topographic independent components analysis for sparse feature extraction

    Publication Year: 2014, Page(s):509 - 510
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (333 KB)

    A no-reference objective metric for image quality assessment by integrating the topographic independent components analysis into feature extraction is presented. By taking the topographic relationship among the initially independent features into consideration, it extracts the features of more sparsity or independency which is essentially related to inherent quality. Evaluation results demonstrate... View full abstract»

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  • Infrared small target detection in compressive domain

    Publication Year: 2014, Page(s):510 - 512
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (255 KB)

    A novel approach to detect an infrared small target in the compressive domain is presented. First, the original infrared image is projected on a sensing matrix to obtain the measurement vector. Then the target and the background are recovered simultaneously from the measurements based on low-rank and sparse matrix decomposition. Experimental results indicate that the proposed method not only works... View full abstract»

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  • Multiplier supporting accuracy and energy trade-offs for recognition applications

    Publication Year: 2014, Page(s):512 - 514
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (278 KB)

    The need to support various recognition applications on energy-constrained mobile computing devices has steadily grown. Exploiting common characteristics of recognition algorithms, a very energy-efficient multiplier that can support a runtime trade-off between computational accuracy and energy consumption is proposed. Compared to a precise multiplier, the proposed multiplier consumes 11.6×-... View full abstract»

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  • Occlusion-adaptive bidirectional motion compensation for pixel-based motion vector field

    Publication Year: 2014, Page(s):514 - 516
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (209 KB)

    An occlusion-adaptive bidirectional motion compensation method using pixel-based motion vectors that reduces ghost artefacts due to occlusion is proposed. The proposed method constructs each pixel in the intermediated frame as a weighted average of its motion-compensated pixel candidates. The weighting factor for each pixel candidate is determined adaptively by utilising a temporal motion consiste... View full abstract»

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  • Segmenting dark channel prior in single image dehazing

    Publication Year: 2014, Page(s):516 - 518
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (235 KB)

    In image dehazing, the existing transmission estimators bring out the halo artefact at boundaries unless they adopt a refinement procedure with a high computational complexity. How the existing transmission estimation methods suffer from the halo artefact at the boundaries are analysed and it is found that the elaborate, high computational refinement procedure to remove the halo effect are excessi... View full abstract»

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  • Improved combining method for design of quasi-cyclic LDPC codes

    Publication Year: 2014, Page(s):518 - 519
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (160 KB)

    An improved combining method is proposed for constructing quasi-cyclic low-density parity-check (QC-LDPC) codes with large girth and few short cycles. Large girth QC-LDPC codes can be obtained by carefully designing one component code with large girth. By properly designing the other component codes, a lot of QC-LDPC codes with very few short cycles can be designed. Simulations show that compared ... View full abstract»

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  • Optimised projections for generalised distributed compressed sensing

    Publication Year: 2014, Page(s):520 - 521
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (141 KB)

    Different signals from the various sensors of the same scene form an ensemble. Distributed compressed sensing (DCS) rests on a new concept called the joint sparsity of the ensemble. JSM-1 is a model that describes the joint sparsity by one dictionary. Previously, the generalisation of JSM-1 was proposed where the signal ensemble depends on two dictionaries. Its compressed sensing (CS) version is c... 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