By Topic

Electronics Letters

Issue 9 • Date April 26 2012

Filter Results

Displaying Results 1 - 25 of 42
  • In brief

    Publication Year: 2012, Page(s): 466
    IEEE is not the copyright holder of this material | PDF file iconPDF (134 KB)
    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Interview

    Publication Year: 2012, Page(s): 466
    IEEE is not the copyright holder of this material | PDF file iconPDF (86 KB)
    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The power of VECSELs

    Publication Year: 2012, Page(s): 467
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (267 KB)

    The first vertical external cavity surface emitting lasers (VECSELs) that have a continuous-wave power output over 100 W, even up to 3 C, have been reported in joint work from Philipps-Universita t Marburg in Germany and the University of Arizona in the US. Key changes to the design, growth procedure, chip mounting and thermal management allowed the researchers to reach 106 W at 1028 nm, which is ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Routing for moore

    Publication Year: 2012, Page(s): 468
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (311 KB)

    Researchers from the National Changhua University of Education in Taiwan have proposed a built-in self-routing scheme for through-silicon vias (TSVs). The scheme, to be applied in three-dimensional integrated circuits (3D IC), improves repair rate, performance and reduces area overheads. As Moore's law begins to reach its limits, 3D ICs are becoming increasingly important for industry, and efficie... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Sub-structure characteristic mode concept for antenna shape synthesis

    Publication Year: 2012, Page(s):471 - 472
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (335 KB)

    A new sub-structure characteristic mode concept for electromagnetic systems is defined and used to extend the applicability of an existing antenna shape-synthesis technique that does not require the feedpoint location to be specified prior to shaping. Application of the procedure is successfully illustrated by a realistic example, with experimental results. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Egg quantity determination based on characteristic polarisation state

    Publication Year: 2012, Page(s):472 - 474
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (120 KB)

    Due to the disability of the traditional complex natural resonant method, the characteristic polarisation state method is proposed to determine egg quantity in a box with a two by three egg configuration. Parameters are investigated for different egg quantity scenarios and the results show a potential way to determine number in terms of characteristic angle β. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Performance analysis of PIFA based 4 x 4 MIMO antenna

    Publication Year: 2012, Page(s):474 - 475
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (195 KB)

    Presented is the design of a planar inverted-F antenna (PIFA) based 4×4 MIMO antenna working in the frequency range 2.4×2.8×GHz, along with its various performance measure parameters such as MEG (mean effective gain), correlation coefficient, TARC and channel capacity, that are calculated using simulation results and presented here for street grid communication applications. T... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Photoresist-based polymer resonator antennas with permanent frame

    Publication Year: 2012, Page(s):475 - 477
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (278 KB)

    Photoresist-based polymer resonator antennas (PRAs) with permanent frame have been fabricated and measured. High-aspect-ratio frames were precisely fabricated by deep exposure lithography and subsequently filled with ceramic-polymer microcomposites. The antenna was fed by a slot on the ground plane and effects of the photoresist frame on antenna characteristics were investigated. Reflection coeffi... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 202pJ/bit area-efficient ASK demodulator for high-density visual prostheses

    Publication Year: 2012, Page(s):477 - 479
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (366 KB)

    A fully integrated low-power and area-efficient ASK demodulator is presented. By using a controllable digital envelope detector and a self-biased clock extractor, the threshold-detection level of the demodulator can be adjusted and the clock from the wireless power carrier can be recovered. This implantable demodulator was fabricated in a 0.35 m CMOS process and tested using inductively-coupled co... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 800 nW 43 nV/√Hz neural recording amplifier with enhanced noise efficiency factor

    Publication Year: 2012, Page(s):479 - 480
    Cited by:  Papers (16)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (256 KB)

    Advances in neuroscience research and clinical applications have increasingly called for the low-power low-noise simultaneous recording of neural signals from a large number of electrodes. The neural interface IC is one of the essential blocks to capture the weak neural signals. Presented is an energy-efficient low-noise neural recording amplifier with enhanced noise efficiency factor (NEF) for ne... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • High-performance built-in self-routing for through-silicon vias

    Publication Year: 2012, Page(s):480 - 482
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (193 KB)

    In this reported work, a built-in self-routing scheme is developed for exploring the through-silicon via (TSV) redundancy to the extremes. A built-in self-router consists of a built-in self-tester for testing the TSVs, and a priority switching network for selecting from M TSVs to N inter-chip interconnects. A switching cell is developed to sequentially construct the priority switching network for ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Low-energy and area-efficient tri-level switching scheme for SAR ADC

    Publication Year: 2012, Page(s):482 - 483
    Cited by:  Papers (13)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (165 KB)

    A novel low-energy tri-level switching scheme for low-power successive approximation register (SAR) ADC is proposed. With the input common-mode voltage (Vcm) designed to be exactly half of the reference voltage (Vref), the switching energy of the proposed switching scheme is reduced by 96.89% as compared with the conventional architecture. Besides the large energy saving, the propose... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Variable step-size affine projection sign algorithm

    Publication Year: 2012, Page(s):483 - 485
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (143 KB)

    Proposed is a variable step-size affine projection sign algorithm (APSA) based on the minimisation of mean-square deviation. Because the proposed algorithm calculates the optimum step size in every iteration, it ensures an improved performance in terms of convergence rate and misalignment, compared to conventional APSAs. The proposed algorithm is tested in a system identification scenario that inc... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Optimised implementation of adaptive GPC for low-order systems with time delays

    Publication Year: 2012, Page(s):485 - 487
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (162 KB)

    In adaptive situations the comparatively large run-time computational burden and implementation complexity of the generalised predictive control (GPC) algorithm can prove troublesome. Presented is an optimised design to implement a GPC adaption mechanism for low-order systems. By adopting a compact state-space model and symbolically solving the underlying Riccati equations, an exact solution with ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Building visual memories of video streams

    Publication Year: 2012, Page(s):487 - 488
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (242 KB)

    A real-time method that automatically creates a visual memory of a scene using the growing neural gas (GNG) algorithm is described. The memory consists of a graph where nodes encode the visual information of a video stream as a limited set of representative images. GNG nodes are automatically generated and dynamically clustered. This method could be employed by robotic platforms in exploratory and... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Gait feature coupling for low-resolution face recognition

    Publication Year: 2012, Page(s):488 - 489
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (291 KB)

    A novel low-resolution (LR) face recognition method has been developed by coupling gait features. The proposed kernel-based manifold method is able to couple the nonlinear features of an LR face with gait and map them into a common space to minimise the distance between the two features extracted from the same individual. Experimental results demonstrate the effectiveness of the proposed method. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Graph cuts based active contour model with selective local or global segmentation

    Publication Year: 2012, Page(s):490 - 491
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (368 KB)

    Graph cuts (GC) and the active contour model (ACM) have become two of the most important schemes in image segmentation. Recently, many researches tend to unify the two schemes to obtain new models for efficient calculation and global minimisation. However, the existing GC based ACMs not only cannot achieve local segmentation, but also suffer from the determination of the regularising parameter, wh... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Selective mathematical modelling algorithm for quarter-pixel motion estimation

    Publication Year: 2012, Page(s):491 - 493
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (165 KB)

    Proposed is an error surface based selective mathematical modelling algorithm for quarter-pixel motion estimation during video encoding. In this method, first the tendency of the error surface is assessed. Using the strength of the edge at the error surface, the error surface region is classified as plain or textured. For plain regions, interpolation-free mathematical modelling is appropriate for ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Sparse coding based feature optimisation for robust 3D object retrieval

    Publication Year: 2012, Page(s):493 - 495
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (344 KB)

    3D object retrieval is an important research issue in the area of computer graphics for applications such as computer-aided design, simulation, and visualisation. The performance of 3D object retrieval systems is dependent on the development of efficient and effective descriptors and similarity measures. Presented is an effective approach for supporting 3D object retrieval based on optimising the ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Sparsity level-aware threshold-based channel structure detection in OFDM systems

    Publication Year: 2012, Page(s):495 - 496
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (129 KB)

    The structure detection of sparse channel impulse response (CIR) is addressed in the frame of OFDM systems. Tap-tuned thresholds, exploiting a priori knowledge about the channel sparsity level (CSL), are designed to optimise the detection error probability. Compared to former proposed thresholds, the CSL-aware thresholds lead to higher CIR structure true detection rates and to lower channel... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Affine projection algorithm with decremental projection order and optimally-designed step size

    Publication Year: 2012, Page(s):496 - 498
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (596 KB)

    The proposed algorithm introduces a novel scheme for obtaining an optimal step size and proposes a criterion for decrementing the projection order, which would lead to fast convergence and a small steady-state estimation error with low computational complexity. The scheme is based on an analysis of the mean square deviation (MSD) for the tap weight and its estimated value at each iteration. The cr... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Dynamic null-data subcarrier switching for OFDM PAPR reduction with low computational overhead

    Publication Year: 2012, Page(s):498 - 499
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (193 KB)

    A computationally efficient null-data subcarrier switching scheme for peak-to-average power ratio (PAPR) reduction of OFDM systems is proposed. By applying incremental searching within dynamically expanding subcarrier bands, the proposed method achieves significant reduction in computational requirement without sacrificing PAPR reduction capability. The effectiveness of the proposed scheme is demo... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • List successive cancellation decoding of polar codes

    Publication Year: 2012, Page(s):500 - 501
    Cited by:  Papers (19)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (136 KB)

    A list successive cancellation (LSC) decoding algorithm to boost the performance of polar codes is proposed. Compared with traditional successive cancellation decoding algorithms, LSC simultaneously produces at most L locally best candidates during the decoding process to reduce the chance of missing the correct codeword. The complexity of the proposed algorithm is O(LNlog ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Tree-based backward pilot generation for sparse channel estimation

    Publication Year: 2012, Page(s):501 - 503
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (141 KB)

    A scheme of tree-based backward pilot generation for sparse channel estimation in orthogonal frequency division multiplexing (OFDM) systems is proposed. Instead of straightforward searching for the best from all possible pilot subsets, the scheme iteratively removes a subcarrier from all OFDM subcarriers in a backward manner. At each time, every subcarrier is tested by deleting it and calculating ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Temperature sensor using BJT-MOSFET pair

    Publication Year: 2012, Page(s):503 - 504
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (216 KB)

    A temperature sensor using the cascade configuration of a pnp bipolar junction transistor (BJT) and a p-type metal-oxide-semiconductor field effect transistor (PMOSFET) was designed and measured. Under a biasing current proportional to absolute temperature for a pnp BJT and a temperature-stable biasing current for a PMOSFET, the plots of emitter-base and source-gate bias voltages against temperatu... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

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