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Electronics Letters

Issue 12 • June 7 2012

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Displaying Results 1 - 25 of 45
  • In Brief

    Publication Year: 2012, Page(s): 668
    IEEE is not the copyright holder of this material | PDF file iconPDF (169 KB)
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  • Interview

    Publication Year: 2012, Page(s): 668
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (139 KB)

    "I am responsible for fi nding solutions to problems with the signal integrity of highspeed telecommunication boards" View full abstract»

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  • Combination lock

    Publication Year: 2012, Page(s): 669
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (353 KB)

    Researchers in the US have combined the outputs of two independent pulsed lasers coherently and interferometrically without using complex optical feedback loops, whilst almost halving the output pulse duration. View full abstract»

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  • Inside View

    Publication Year: 2012, Page(s): 670
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (286 KB)

    Researchers in China have used a technique called successive cancellation stack to improve the performance of polar codes. Even in high signal-to-noise ratio systems, the system offers low complexity and state-of-the-art performance. Kai Niu of the Beijing University of Posts and Telecommunications in China tells us more. View full abstract»

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  • Design of trapezoid monopole antenna with band-notched performance for UWB

    Publication Year: 2012, Page(s):673 - 674
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (426 KB)

    A trapezoid monopole antenna with a band-notched performance for UWB is presented. The proposed antenna is fabricated on a 1.6 mm-thick FR-4 substrate with a relative permittivity of 4.2 and a loss tangent of 0.02. The VSWR of the proposed antenna is measured and then compared with simulated results. The measured parameters are in agreement with the simulation results, and the antenna offers an ex... View full abstract»

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  • Dual-band dual-polarised microstrip array with fractional frequency ratio

    Publication Year: 2012, Page(s):674 - 676
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (457 KB)

    An S/X dual-band dual-polarised shared aperture microstrip array with fractional frequency ratio (FR=1:3.5) is presented. A hybrid feed is adopted in this phased array to improve the isolation. Measured results agree well with the simulation, exhibiting a |S11|≤15 dB bandwidth of 10% in both bands. Good polarisation-isolation and radiation pattern are also confirmed. View full abstract»

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  • Small slot design for slotted waveguide antenna stiffened structure

    Publication Year: 2012, Page(s):676 - 677
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (394 KB)

    The slotted waveguide antenna stiffened structure (SWASS) is a conformal load bearing antenna concept that aims to replace existing aircraft antennas with a structurally integrated equivalent. In SWASS, slots are cut through the skin of hat-stiffened or blade-stiffened aircraft panels to create slotted waveguide antennas. The structural integrity of these panels is at maximum when the slot dimensi... View full abstract»

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  • Fast learning algorithm to improve performance of Quickprop

    Publication Year: 2012, Page(s):678 - 679
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (171 KB)

    Quickprop is one of the most popular fast learning algorithms in training feed-forward neural networks. Its learning rate is fast; however, it is still limited by the gradient of the backpropagation algorithm and it is easily trapped into a local minimum. Proposed is a new fast learning algorithm to overcome these two drawbacks. The performance investigation in different learning problems (applica... View full abstract»

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  • Framework for performing rapid evaluation of 3D SoCs

    Publication Year: 2012, Page(s):679 - 681
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (211 KB)

    Integrating more functionality in a smaller form factor with lower power consumption pushes traditional semiconductor technology scaling to its limits. Three-dimensional (3D) chip stacking is touted as the silver bullet technology that can keep Moore's momentum and fuel the next wave of consumer electronic products. Introduced is a framework that enables rapid evaluation of 3D SoCs with existing p... View full abstract»

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  • Area-power efficient lighting unit architecture based on hardware sharing

    Publication Year: 2012, Page(s):681 - 682
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (260 KB)

    A shared lighting unit architecture suitable for mobile 3D graphics is presented. Sharing of resources is achieved by reusing a unitary vector operation, and diffuse and specular components calculation. Balance between area and power dissipation was compared with a more prevalent parallel unit architecture implementation. Results indicate that parallel implementations of the proposed shared units ... View full abstract»

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  • Fairness of proportional work-conserving I/O scheduling

    Publication Year: 2012, Page(s):682 - 684
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (143 KB)

    Proposed is a new I/O scheduling for SSD, proportional work-conserving. The proposed scheduling algorithm provides proportional fairness among tasks. To provide proportional fairness, proportional work-conserving differentiates probability to fully utilise the task's quantum, which is controlled by adjusting opportunistic waiting time. Its proportional fairness is formally proveds and its validity... View full abstract»

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  • Simulation of memristors in presence of high-frequency forcing function

    Publication Year: 2012, Page(s):684 - 686
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (184 KB)

    This reported work is concerned with the simulation of memristors when they are subject to high-frequency forcing functions. A novel asymptotic-numeric simulation method is applied. For systems involving high-frequency signals or forcing functions, the superiority of the proposed method in terms of accuracy and efficiency when compared to standard simulation techniques is illustrated. Relevant dyn... View full abstract»

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  • Starved picowatt oscillator for remote sensor wake-up timer

    Publication Year: 2012, Page(s):686 - 687
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (220 KB)

    A sub-nanowatt oscillator is described. The oscillator is intended for a wake-up timer for remote sensors and hence trades frequency accuracy for reduced power consumption. It is constructed from a five-stage ring of inverters in which the switching speed is reduced using transistors that are always-off, or starved. Fabricated in a 0.35 μm process, the oscillator and its active load dissipa... View full abstract»

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  • Data-driven MCMC sampling for vision-based 6D SLAM

    Publication Year: 2012, Page(s):687 - 689
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (216 KB)

    An efficient sampling technique for estimating camera motion is presented. For this purpose, Markov chain Monte Carlo (MCMC) sampling is incorporated into the data-driven proposal distribution in order to improve the SLAM performance. Experimental results using both synthetic and real datasets demonstrate the efficiency of the proposed method. View full abstract»

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  • Early TU decision method for fast video encoding in high efficiency video coding

    Publication Year: 2012, Page(s):689 - 691
    Cited by:  Papers (18)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (112 KB)

    Proposed is an early transform unit (TU) decision method for high efficiency video coding (HEVC) by early determination of the TU sizes based on coding tree pruning. Although the coding efficiency in HEVC can be improved by using various transform block sizes, the computational complexity increased dramatically in terms of the transform kernel size and the transform coding structure. A simple TU d... View full abstract»

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  • Feedback free multiple description distributed video coding for robust transmission

    Publication Year: 2012, Page(s):691 - 692
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (161 KB)

    A new scheme combining multiple description coding (MDC) and distributed video coding (DVC), called a novel feedback free multiple description distributed video coding (MDDVC) scheme, is proposed to overcome the drift distortion and feedback problem for robust transmission. Experimental results show that the proposed MDDVC proves to be a promising scheme, removing the feedback channel. View full abstract»

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  • Does amplitude or phase noise arise first?

    Publication Year: 2012, Page(s):692 - 693
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (265 KB)

    Measured cross-correlation values of phase and relative amplitude noises on the same carrier are equal for the same positive and negative time shifts. Consequently, it cannot be distinguished if amplitude or phase noise arises first. View full abstract»

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  • Optimal multiple-relay selection in dual-hop amplify-and-forward cooperative networks

    Publication Year: 2012, Page(s):694 - 695
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (117 KB)

    Algorithms and rules for the optimal selection of multiple amplify-and-forward relays are developed in a dual-hop cooperative network. A linear fractional programming approach is first formulated. Then, a surprisingly simple water-filling-like closed-form solution is derived, which shows many interesting properties of the optimal relay selection. View full abstract»

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  • Stack decoding of polar codes

    Publication Year: 2012, Page(s):695 - 697
    Cited by:  Papers (44)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (121 KB)

    A successive cancellation stack (SCS) decoding algorithm is proposed to improve the performance of polar codes. Unlike the conventional successive cancellation decoder which determines the bits successively with a local optimal strategy, the SCS algorithm stores a number of candidate partial paths in an ordered stack and tries to find the global optimal estimation by searching along the best path ... View full abstract»

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  • Using output voltage of charge drivers to reduce hysteresis of piezoelectric actuators

    Publication Year: 2012, Page(s):697 - 698
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (236 KB)

    Proposed is a new method to reduce the hysteresis of piezoelectric actuators. A reference piezoelectric actuator driven by a charge controller was used to obtain the driving voltage, which was applied to a target actuator via a suitable voltage amplifier. Experiments showed that a reduction of 84-90% at frequencies from 0.05 to 10 Hz was obtained compared with the direct voltage drive method. This... View full abstract»

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  • 5 mHz highpass filter with -80 dB total harmonic distortions

    Publication Year: 2012, Page(s):698 - 699
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (302 KB)

    A fully integrated 5 mHz highpass filter for electrophysiological signal acquisitions is described. Unlike the traditional Gm-C or pseudo-resistor architectures, the proposed continuous-time filter employs the current steering technique, which helps decrease the capacitance area and reduce the total harmonic distortion (THD) simultaneously. This design was fabricated in 0.18 μm CMOS technol... View full abstract»

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  • Packaged microstrip triplexer with star-junction topology

    Publication Year: 2012, Page(s):699 - 701
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (402 KB)

    A planar microstrip triplexer with compact size is proposed. The triplexer is composed of three pairs of bandpass filters and a star-junction. Specifically, the bandpass filters are constructed by stepped hairpin resonators; the coupled feeding is applied to the star-junction, where bandpass filters are connected. Consequently, three passbands will be generated and a wideband insertion loss will b... View full abstract»

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  • Efficient technique for analysis of printed microwave circuits using characteristic basis functions

    Publication Year: 2012, Page(s):701 - 702
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (317 KB)

    An efficient technique for the analysis of microwave circuits and antennas etched on a layered medium is presented. The proposed method, based on the recently introduced equivalent medium approach, yields accurate results and yet reduces computational time in comparison with the conventional method of moments algorithm. A numerical example which demonstrates the accuracy and numerical efficiency o... View full abstract»

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  • Broadband compact InGaAs pin 5-bit digital attenuator using πtype resistive network

    Publication Year: 2012, Page(s):702 - 704
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (333 KB)

    A broadband compact InGaAs pin 5-bit digital attenuator using a π-type resistive network is demonstrated. The proposed 5-bit digital attenuator is composed of π-type resistive networks for good input/output matching and accurate attenuation characteristics. The fabricated attenuator MMIC has good performance characteristics, such as an insertion loss less than 11.5 dB and a sm... View full abstract»

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  • Compact dual-band bandpass filter with improved stopband characteristics

    Publication Year: 2012, Page(s):704 - 705
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (334 KB)

    A compact dual-band bandpass filter with an improved stopband using short-circuit centred stepped impedance resonators (SCSIRs) is presented. The proposed filter consists of two SCSIRs, one of which is embedded in the other one to obtain two passbands. Multiple transmission zeros can be generated by the proposed SCSIR for high passband selectivity and upper wide stopband bandwidth. The centre freq... 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