Online ISSN
1350-911X
Print ISSN
0013-5194
Electronics Letters
Volume 43, Issue 9, 26 April 2007
Volumes & issues:
-
Volume 59 (2023)
-
Volume 58 (2022)
-
Volume 57 (2021)
-
Volume 56 (2020)
-
Volume 55 (2019)
-
Volume 54 (2018)
-
Volume 53 (2017)
-
Volume 52 (2016)
-
Volume 51 (2015)
-
Volume 50 (2014)
-
Volume 49 (2013)
-
Volume 48 (2012)
-
Volume 47 (2011)
-
Volume 46 (2010)
-
Volume 45 (2009)
-
Volume 44 (2008)
-
Volume 43 (2007)
-
Volume 42 (2006)
-
Volume 41 (2005)
-
Volume 40 (2004)
-
Volume 39 (2003)
-
Volume 38 (2002)
-
Volume 37 (2001)
-
Volume 36 (2000)
-
Volume 35 (1999)
-
Volume 34 (1998)
-
Volume 33 (1997)
-
Volume 32 (1996)
-
Volume 31 (1995)
-
Volume 30 (1994)
-
Volume 29 (1993)
-
Volume 28 (1992)
-
Volume 27 (1991)
-
Volume 26 (1990)
-
Volume 25 (1989)
-
Volume 24 (1988)
-
Volume 23 (1987)
-
Volume 22 (1986)
-
Volume 21 (1985)
-
Volume 20 (1984)
-
Volume 19 (1983)
-
Volume 18 (1982)
-
Volume 17 (1981)
-
Volume 16 (1980)
-
Volume 15 (1979)
-
Volume 14 (1978)
-
Volume 13 (1977)
-
Volume 12 (1976)
-
Volume 11 (1975)
-
Volume 10 (1974)
-
Volume 9 (1973)
-
Volume 8 (1972)
-
Volume 7 (1971)
-
Volume 6 (1970)
-
Volume 5 (1969)
-
Volume 4 (1968)
-
Volume 3 (1967)
-
Volume 2 (1966)
-
Volume 1 (1965)
Volume 43, Issue 9
26 April 2007
-
- Author(s): C.C. Chou ; K.H. Lin ; H.L. Su
- Source: Electronics Letters, Volume 43, Issue 9, p. 485 –486
- DOI: 10.1049/el:20070189
- Type: Article
- + Show details - Hide details
-
p.
485
–486
(2)
A new design of a circularly polarised square slot antenna loaded with a cross patch is presented. A cross patch inclined diagonally with respect to the square slot is placed at the centre of the square slot. By choosing proper dimensions of the cross patch, two orthogonal resonant modes with a 90° phase difference for circular polarisation can be excited and feed the square slot antenna using a 50 Ω CPW with a protruded signal strip. 10 dB return loss bandwidth of 846 MHz (39.6%) and 3 dB axial ratio bandwidth of 240 MHz (12.4%) for the proposed antenna are achieved. Gain variation within the CP bandwidth is observed to be less than 1 dB. - Author(s): A. Karwowski and A. Noga
- Source: Electronics Letters, Volume 43, Issue 9, p. 486 –487
- DOI: 10.1049/el:20070557
- Type: Article
- + Show details - Hide details
-
p.
486
–487
(2)
A highly efficient computational electromagnetics technique based upon method of moments-physical optics (MM-PO) hybrid formulation combined with the impedance matrix interpolation and a dynamic adaptive frequency sampling for wideband analysis of antennas radiating in the presence of conducting bodies is presented. Sample numerical results demonstrate the capability of the technique. - Author(s): K. Wincza ; S. Gruszczynski ; J. Borgosz
- Source: Electronics Letters, Volume 43, Issue 9, p. 487 –489
- DOI: 10.1049/el:20070696
- Type: Article
- + Show details - Hide details
-
p.
487
–489
(3)
A new microstrip antenna array with series-fed patches is proposed. To reduce the length of feeding lines the ‘through-element’ feeding technique has been developed. A microstrip patch in which the input feeding line is directly connected and the output line is coupled to a patch is investigated. By adjusting the length of the coupling region an appropriate coupling level is achieved. A 4×1 antenna array operating within the 24 GHz frequency band for radar sensor applications is designed using the proposed feeding technique. - Author(s): A. Gardelein ; S. Le Tacon ; E. Tanguy ; N. Breuil ; T. Razban-Haghighi
- Source: Electronics Letters, Volume 43, Issue 9, p. 489 –491
- DOI: 10.1049/el:20070257
- Type: Article
- + Show details - Hide details
-
p.
489
–491
(3)
The experimental results of a polymer microwave electro-optic antenna are reported. The device amplitude-modulates an optical input beam with a free-space propagating electromagnetic wave. By using a new dipole printed antenna, the electromagnetic energy is concentrated inside the device. An antenna factor of 168 dB/m is achieved with only 1 µm of electro-optic polymer. - Author(s): A. Mehta and D. Mirshekar-Syahkal
- Source: Electronics Letters, Volume 43, Issue 9, p. 491 –493
- DOI: 10.1049/el:20070662
- Type: Article
- + Show details - Hide details
-
p.
491
–493
(3)
A novel form of square loop antenna for beam adaptive applications is presented and analysed. The square loop has four feeding points, which when excited one at a time steer the beam in four different space quadrants. Using current distribution a qualitative explanation for the radiation mechanism is also presented. - Author(s): A. Ourir ; S.N. Burokur ; A. de Lustrac
- Source: Electronics Letters, Volume 43, Issue 9, p. 493 –494
- DOI: 10.1049/el:20070298
- Type: Article
- + Show details - Hide details
-
p.
493
–494
(2)
The design of a locally phase-varying one-dimensional metamaterial working near 10 GHz is reported. It is made from a capacitive and an inductive grid. The phase-varying behaviour is obtained with a regular incrementation of the spacing between each unit cell of the capacitive grid in one direction. This composite metamaterial is then used as a partially reflecting surface in a resonant Fabry-Pérot type cavity together with a patch antenna to constitute a compact steerable directive printed antenna. A ±20° deflection of the antenna beam is obtained.
Broadband circularly polarised cross-patch-loaded square slot antenna
Fast MM-PO-based numerical modelling technique for wideband analysis of antennas near conducting objects
Microstrip antenna array with series-fed ‘through-element’ coupled patches
Passive electro-optic antenna using polymer material
Pattern steerable square loop antenna
Phase-varying metamaterial for compact steerable directive antennas
-
- Author(s): M. Roca ; E. Isern ; R. Picos ; S. Bota ; K. Suenaga ; E. García-Moreno
- Source: Electronics Letters, Volume 43, Issue 9, p. 494 –496
- DOI: 10.1049/el:20070269
- Type: Article
- + Show details - Hide details
-
p.
494
–496
(3)
A methodology for predicting the specifications of a continuous-time biquad filter is presented. The predictions are made from a reduced set of measurements on the circuit reconfigured as a relaxation oscillator. The filter, based on operational transconductance amplifiers, has been designed in a CMOS 0.35 µm process. Technological process variation is considered as the main cause of deviation in the circuit behaviour. The work focuses on evaluation of prediction accuracy using non-parametric statistics.
Accuracy evaluation in parameter prediction of analogue circuits using nonlinear oscillation methods
-
- Author(s): C.W. Ng ; N. Wong ; T.S. Ng
- Source: Electronics Letters, Volume 43, Issue 9, p. 496 –497
- DOI: 10.1049/el:20070293
- Type: Article
- + Show details - Hide details
-
p.
496
–497
(2)
A four-input adder structure for the FPGA implementation of a sigma–delta bit-stream multiplier is proposed. Conventional bit-stream multiplier implementations involve two-input adder circuits. It is shown that the four-input adder structure is more resource-efficient (over 40% hardware savings) and faster (over 20% higher clock frequency) when implemented using state-of-the-art FPGA architecture featuring six-input look-up tables. - Author(s): V. Sathe ; M.C. Papaefthymiou ; S.V. Kosonocky ; S. Kim
- Source: Electronics Letters, Volume 43, Issue 9, p. 497 –499
- DOI: 10.1049/el:20070057
- Type: Article
- + Show details - Hide details
-
p.
497
–499
(3)
Data transfer between arbitrary asynchronous clock domains is complicated, and practical solutions can be subject to synchronisation failure. But many practical systems use quotient frequencies and the direct conversion method (DCM) exploits this to achieve reliable data transfer without any handshaking. DCM minimises throughput, even between distant cores, is provably correct and has been assessed through transistor-level simulations.
Efficient FPGA implementation of bit-stream multipliers
On-chip synchronous communication between clock domains with quotient frequencies
-
- Author(s): L. Gürel and Ö. Ergül
- Source: Electronics Letters, Volume 43, Issue 9, p. 499 –500
- DOI: 10.1049/el:20070639
- Type: Article
- + Show details - Hide details
-
p.
499
–500
(2)
The solution of extremely large scattering problems that are formulated by integral equations and discretised with tens of millions of unknowns is reported. Accurate and efficient solutions are performed by employing a parallel implementation of the multilevel fast multipole algorithm. The effectiveness of the implementation is demonstrated on a sphere problem containing more than 33 million unknowns, which is the largest integral-equation problem ever solved to our knowledge.
Fast and accurate solutions of extremely large integral-equation problems discretised with tens of millions of unknowns
-
- Author(s): M. Foroni ; F. Poli ; A. Cucinotta ; S. Selleri
- Source: Electronics Letters, Volume 43, Issue 9, p. 500 –502
- DOI: 10.1049/el:20070586
- Type: Article
- + Show details - Hide details
-
p.
500
–502
(3)
A single frequency depressed-cladding erbium-doped fibre ring laser which can be tuned by exploiting the fibre bending losses has been proposed and experimentally demonstrated. A tunability range of about 44 nm, between 1491 and 1535 nm, has been measured. A saturable absorber formed by an unpumped erbium-doped fibre has been employed to guarantee single frequency operation.
Tunability of erbium-doped fibre ring laser based on bending loss of active fibre
-
- Author(s): M. Jiang and D. Crookes
- Source: Electronics Letters, Volume 43, Issue 9, p. 502 –503
- DOI: 10.1049/el:20070201
- Type: Article
- + Show details - Hide details
-
p.
502
–503
(2)
An area-efficient high-throughput architecture based on distributed arithmetic is proposed for 3D discrete wavelet transform (DWT). The 3D DWT processor was designed in VHDL and mapped to a Xilinx Virtex-E FPGA. The processor runs up to 85 MHz, which can process the five-level DWT analysis of a 128×128×128 fMRI volume image in 20 ms. - Author(s): I.S. Lim ; D. Hughes ; N.W. John
- Source: Electronics Letters, Volume 43, Issue 9, p. 503 –505
- DOI: 10.1049/el:20073942
- Type: Article
- + Show details - Hide details
-
p.
503
–505
(3)
Closed-form solutions for lowpass filtering of 3D digital geometry are presented. Conventional signal processing is difficult to apply since 3D digital geometry does not usually satisfy the prerequisites of regular sampling and global parameterisation. Representing digital geometry as a level set of a 3D scalar field fitted with Gaussians and polynomials, derived are closed-form solutions of convolution with Gaussian smoothing kernels and lowpass filtering without the pitfalls of other approaches are analytically achieved. - Author(s): E.R. Davies
- Source: Electronics Letters, Volume 43, Issue 9, p. 505 –507
- DOI: 10.1049/el:20070330
- Type: Article
- + Show details - Hide details
-
p.
505
–507
(3)
The vector median filter (VMF) is a widely used means of eliminating impulse noise in colour images, and has the advantage of largely eliminating colour bleeding. The generalised median filter (GMF) has the capability for eliminating even more noise than the VMF, while not being targeted quite so specifically at colour bleeding. Ways of implementing the GMF are demonstrated so that it runs sufficiently rapidly to make it a useful alternative to the VMF, thereby opening the way for much wider use of this highly effective type of filter. - Author(s): F. Essannouni ; R. Oulad Haj Thami ; D. Aboutajdine ; A. Salam
- Source: Electronics Letters, Volume 43, Issue 9, p. 507 –508
- DOI: 10.1049/el:20070793
- Type: Article
- + Show details - Hide details
-
p.
507
–508
(2)
Fast and simple L4 norm computation for translational template matching is presented. The proposed method is based on expressing the L4 norm in terms of two cross-correlations. Speed is obtained from computing the correlations in the frequency domain using FFT algorithms. - Author(s): E.R. Davies
- Source: Electronics Letters, Volume 43, Issue 9, p. 508 –510
- DOI: 10.1049/el:20070113
- Type: Article
- + Show details - Hide details
-
p.
508
–510
(3)
A known problem relating to the rapid location of objects by sampling is tackled. Specifically, a new guided sampling technique has been shown to be able to take into account a priori probabilities for object placement and to automatically carry out body-based or edge-based sampling as appropriate. In addition, the technique carries out full binary search tree edge location without explicit programming. Overall, the sequential attention-based analysis emulates certain desirable aspects of the operation of the human visual system.
Area-efficient high-speed 3D DWT processor architecture
Closed-form solutions for lowpass filtering of 3D digital geometry
Fast implementation of generalised median filter
Fast L4 template matching using frequency domain
Guided sampling for rapid object location using biologically motivated model
-
- Author(s): L. Zhao ; J. Zhang ; H. Zhang
- Source: Electronics Letters, Volume 43, Issue 9, p. 510 –511
- DOI: 10.1049/el:20070653
- Type: Article
- + Show details - Hide details
-
p.
510
–511
(2)
A game-theoretic DCF (GDCF) in IEEE 802.11 is presented, to improve the performance of WLANs by designing a simple auto-degressive backoff mechanism based on incompletely co-operative game theory. Simulation results show that GDCF can increase system throughput and decrease delay and packet-loss-rate while maintaining reasonable energy consumption.
GDCF: game-theoretic distributed co-ordination function in WLANs
-
- Author(s): Ch.S. Roumenin and S.V. Lozanova
- Source: Electronics Letters, Volume 43, Issue 9, p. 511 –513
- DOI: 10.1049/el:20070784
- Type: Article
- + Show details - Hide details
-
p.
511
–513
(3)
A new silicon integrated 2D Hall sensor for high-accuracy magnetic-field in-plane vector measurements fabricated through a CMOS technology, has been suggested and tested. Its unique advantage is minimal design complexity: only four external connections, lack of cross-sensitivity between the channels and very high resolution. In addition, a simple, but highly effective circuitry fully compensates for the offsets and the nonlinear magnetoresistance of the two outputs.
CMOS 2D Hall microsensor with minimal design complexity
-
- Author(s): B. Frank ; M. Hossain ; G. Feng ; Y. Antar
- Source: Electronics Letters, Volume 43, Issue 9, p. 513 –514
- DOI: 10.1049/el:20070637
- Type: Article
- + Show details - Hide details
-
p.
513
–514
(2)
Differential planar coupled loops are examined as a method of integrating silicon electronics with passive elements on low-loss microwave laminates. Two test structures are examined which abut planar loops on a CMOS chip to similarly sized loops on a low-loss microwave laminate. The insertion loss of a pair of the 1000×1000 µm loops was measured to be approximately 3 dB at 20 GHz, and the loss between the 700×300 µm loops was measured to be approximately 6 dB at 20 GHz. - Author(s): J. Liu ; I. O'Connor ; D. Navarro ; F. Gaffiot
- Source: Electronics Letters, Volume 43, Issue 9, p. 514 –516
- DOI: 10.1049/el:20070413
- Type: Article
- + Show details - Hide details
-
p.
514
–516
(3)
Described is a dynamically reconfigurable 8-function logic gate with seven double-gate carbon nanotube field-effect transistors which demonstrates p-type or n-type behaviour depending on the back-gate voltage. Through simulations, the gate is shown to operate at 20 GHz and has been used to build a 1-bit pipelined full adder using physically identical reconfigurable cells. - Author(s): K.-J. Gan ; C.-S. Tsai ; W.-L. Sun
- Source: Electronics Letters, Volume 43, Issue 9, p. 516 –517
- DOI: 10.1049/el:20070039
- Type: Article
- + Show details - Hide details
-
p.
516
–517
(2)
A novel negative differential resistance (NDR) circuit made of a metal-oxide-semiconductor field-effect-transistor (MOS) and a heterojunction bipolar transistor (HBT) is presented. By suitably modulating the width/length parameters of the MOS devices, the fabrication of this MOS-HBT-NDR circuit and its application to inverter design based on the standard 0.35 µm SiGe process was demonstrated.
Coupled loops at 20 GHz for stacked planar circuits
Design of CNTFET-based reconfigurable logic gate
Fabrication and application of MOS-HBT-NDR circuit using standard SiGe process
-
- Author(s): A.S. Webb ; F.R. Mahamd Adikan ; J.K. Sahu ; R.J. Standish ; C.B.E. Gawith ; J.C. Gates ; P.G.R. Smith ; D.N. Payne
- Source: Electronics Letters, Volume 43, Issue 9, p. 517 –519
- DOI: 10.1049/el:20070281
- Type: Article
- + Show details - Hide details
-
p.
517
–519
(3)
A method for fabricating planar silica substrates via modified chemical vapour deposition (MCVD) and a modified fibre drawing technique is presented. Long lengths of planar material are generated from a single substrate offering a potentially low-cost alternative to existing planar substrate deposition processes. Buried straight and splitting waveguide channels, as well as Bragg gratings, are inscribed in the planar material using direct UV-writing technology, and the results are reported.
MCVD planar substrates for UV-written waveguide devices
-
- Author(s): P.V.S. Marques ; J.R. Bonar ; A.M.P. Leite ; J.S. Aitchison
- Source: Electronics Letters, Volume 43, Issue 9, p. 519 –520
- DOI: 10.1049/el:20070679
- Type: Article
- + Show details - Hide details
-
p.
519
–520
(2)
A neodymium-doped glass waveguide laser based on a new structure employing two core layers is reported. This double-layer structure allows a photosensitive layer to be integrated with an efficient gain layer. Singlemode operation was obtained with a lasing threshold of 93 mW and an efficiency of 0.6%. - Author(s): K. Ohtani ; K. Fujita ; H. Ohno
- Source: Electronics Letters, Volume 43, Issue 9, p. 520 –522
- DOI: 10.1049/el:20070251
- Type: Article
- + Show details - Hide details
-
p.
520
–522
(3)
A room-temperature InAs/AlSb quantum-cascade laser operating at 8.9 µm is reported. The laser structure is grown on an n-InAs (100) substrate by solid-source molecular-beam epitaxy. The active region utilises a diagonal intersubband transition in an InAs/AlSb three-quantum-well structure. Observed threshold current density in pulse mode is 2.6 kA/cm2 at 80 K and 12.0 kA/cm2 at 300 K. The maximum operation temperature is 305 K. - Author(s): D.M. Adams ; M. Isaksson ; J.-O. Wesström ; U. Eriksson ; S. Hammerfeldt ; B. Stoltz ; P. Granestrand ; E. Goobar ; R. Lewén ; P.-J. Rigole ; W. Bardyszewski
- Source: Electronics Letters, Volume 43, Issue 9, p. 522 –524
- DOI: 10.1049/el:20070603
- Type: Article
- + Show details - Hide details
-
p.
522
–524
(3)
A zero-chirp Mach-Zehnder modulator monolithically integrated with a widely tunable modulated grating Y laser and SOA, operating at 10 Gbit/s, is demonstrated. The device is hermetically packaged with a wavelength locker within a 12.7×15.24 mm module. With a fixed receiver threshold and fixed voltage modulation depth, the extinction ratio exceeds 12 dB and the receiver penalty for dispersion in the range ±800 ps/nm is below 1.5 dB on all channels. - Author(s): D. Chen ; S. Qin ; Y. Gao ; S. Gao
- Source: Electronics Letters, Volume 43, Issue 9, p. 524 –525
- DOI: 10.1049/el:20070457
- Type: Article
- + Show details - Hide details
-
p.
524
–525
(2)
A novel multiwavelength erbium-doped fibre laser is proposed by incorporating a section of dispersion-shifted fibre (DSF) and a Mach-Zehnder interferometer (MZI). The wavelength spacing of the fibre laser can be continuously tuned by adjusting an optical variable delay line in the MZI-based comb filter. Stable multiwavelength lasing at room temperature with the standard ITU (International Telecommunication Union) channel spacing of 0.2 nm (25 GHz), 0.4 nm (50 GHz), 0.8 nm (100 GHz) or 1.6 nm (200 GHz) is demonstrated.
Bragg gratings in two-layer core planar silica-on-silicon waveguides and application to integrated lasers
Room-temperature InAs/AlSb quantum-cascade laser operating at 8.9 µm
Transmission performance of monolithically integrated Y-branch tunable laser with zero-chirp Mach-Zehnder modulator
Wavelength-spacing continuously tunable multiwavelength erbium-doped fibre laser based on DSF and MZI
-
- Author(s): D. Chen and C.H. Cheng
- Source: Electronics Letters, Volume 43, Issue 9, p. 526 –527
- DOI: 10.1049/el:20070422
- Type: Article
- + Show details - Hide details
-
p.
526
–527
(2)
A novel coplanar waveguide (CPW) bandpass filter (BPF) based on cross-coupling using quarter-wavelength resonators is presented. The BPF is composed of four CPW quarter-wavelength resonators. It has been investigated numerically and experimentally. Both simulated and measured results show that the filter has good performance including the minimum insertion loss of 1.7 dB in its passband and an out-of-band rejection level of below −20 dB in both lower and upper stopbands. - Author(s): A. Djaiz ; T.A. Denidni ; M. Nedil
- Source: Electronics Letters, Volume 43, Issue 9, p. 527 –528
- DOI: 10.1049/el:20070300
- Type: Article
- + Show details - Hide details
-
p.
527
–528
(2)
A new miniaturised configuration of a single-input-single-output dual-band bandpass filter operating at 2.45 and 5.8 GHz frequency bands is presented. The proposed filter is composed of four sub-miniaturised open-loop resonators (OLRs) embedded into two main basic stepped-impedance resonators (SIRs) used as the principal part of this filter. The use of SIR and OLR resonators allows controlling the lower and upper bands, respectively, to achieve the required frequency bands. Finally, a design example was fabricated and measured. - Author(s): A. Ali ; M.A. Khan ; Z. Hu
- Source: Electronics Letters, Volume 43, Issue 9, p. 528 –530
- DOI: 10.1049/el:20070444
- Type: Article
- + Show details - Hide details
-
p.
528
–530
(3)
A binomial lowpass filter provides the flattest passband response but slow attenuation transition. Presented is a design for improving roll-off performance based on the negative-ɛ property of complementary split ring resonators, while maintaining filter passband performance with smaller size. Measured results indicate that the proposed structure achieves a flat passband with no ripples as well as having a selectivity of 32 dB/GHz. This significantly exceeds the 17 dB/GHz selectivity of the conventional design. Furthermore, the proposed filter has a smaller size by 16%. - Author(s): F. Aznar ; M. Gil ; J. Bonache ; J. García-García ; F. Martín
- Source: Electronics Letters, Volume 43, Issue 9, p. 530 –532
- DOI: 10.1049/el:20073839
- Type: Article
- + Show details - Hide details
-
p.
530
–532
(3)
Microstrip lines periodically loaded with broad-side coupled spiral resonators (BC-SRs) are designed, fabricated and characterised for the first time. These structures inhibit signal propagation in the vicinity of the resonance frequency of the spirals, fo. This stopband behaviour is due to magnetic coupling between the line and the BC-SRs at resonance. As long as the electrical size of the BC-SRs is small, the structures can also be considered as metamaterial transmission lines with negative effective permeability, µeff. This negative value of µeff takes place in a narrow band above fo, as occurs in split ring resonator (SRR) loaded lines, or in transmission lines coupled to spiral resonators etched in a single metal level (edge-coupled spiral resonators (EC-SRs). However, because each loop of the BC-SR is etched in a different metal level (face-to-face loops), the equivalent capacitance of the resonant tank can be substantially enhanced. Thus, by using narrow microwave substrates, the BC-SRs loaded lines can be made much smaller than SRR or EC-SR loaded lines. - Author(s): M. Sánchez-Renedo and R. Gómez-García
- Source: Electronics Letters, Volume 43, Issue 9, p. 532 –534
- DOI: 10.1049/el:20070455
- Type: Article
- + Show details - Hide details
-
p.
532
–534
(3)
A class of planar tunable combline filter with compact dimensions is reported. The size decrease is achieved through an original planar coupling-reduction technique, useful for parallel-coupled transmission-line resonator filters. It consists of inserting planar decoupling walls, made up of a transmission-line segment shortened to ground at both extremes, between the adjacent filter resonators. Thus, the spacings between these resonators for a given coupling configuration can be significantly reduced, hence decreasing overall filter size. To prove the concept, simulation results for both stripline and microstrip technologies and measurements of a varactor-tuned microstrip combline filter prototype are given. Other applications of the proposed planar coupling-reduction method are discussed.
Coplanar waveguide bandpass filter using quarter-wavelength resonators
Dual-band filter using multilayer structures and embedded resonators
High selectivity lowpass filter using negative-ɛ metamaterial resonators
Metamaterial transmission lines based on broad-side coupled spiral resonators
Small-size planar tunable combline filter using decoupling walls
-
- Author(s): Q. Huang ; S. Chan ; M. Zukerman
- Source: Electronics Letters, Volume 43, Issue 9, p. 534 –535
- DOI: 10.1049/el:20070626
- Type: Article
- + Show details - Hide details
-
p.
534
–535
(2)
Mobility prediction techniques have been proposed to improve handoff performance by reserving bandwidth in the cells traversed by the predicted trajectory of a mobile terminal. These techniques generally involve intensive computations in achieving accurate prediction. It is investigated whether it is worthwhile to deploy such computationally intensive techniques by evaluating the impact of mobility prediction accuracy on the performance improvement in handoff calls. - Author(s): S.I. Husain ; J. Yuan ; J. Zhang
- Source: Electronics Letters, Volume 43, Issue 9, p. 535 –537
- DOI: 10.1049/el:20070584
- Type: Article
- + Show details - Hide details
-
p.
535
–537
(3)
A modified version of the maximum shortening signal-to-noise ratio (MSSNR) algorithm for channel shortening in ultra-wideband (UWB) communication systems is presented. The proposed algorithm introduces two additional UWB channel related parameters in the optimisation problem along with the conventional energy criterion. This modification significantly improves the performance of the conventional MSSNR algorithm and enables it to handle the extreme nature of channel shortening needed in UWB systems. The proposed algorithm outperforms the conventional MSSNR algorithm in terms of different comparative parameters. - Author(s): Z. Wu ; L. Zhou ; A. Burr
- Source: Electronics Letters, Volume 43, Issue 9, p. 537 –538
- DOI: 10.1049/el:20070667
- Type: Article
- + Show details - Hide details
-
p.
537
–538
(2)
A power control scheme for multiple-input multiple-output systems using spatial multiplexing with a minimum mean square error (MMSE) receiver is proposed under slow fading scenarios. Simulation results show that the proposed scheme provides a significant reduction in bit error rate compared to that of no power control. - Author(s): J.M. Choi and J.H. Lee
- Source: Electronics Letters, Volume 43, Issue 9, p. 539 –540
- DOI: 10.1049/el:20070155
- Type: Article
- + Show details - Hide details
-
p.
539
–540
(2)
A sounding subband allocation algorithm is proposed for a proportional fair (PF) scheduler in an OFDMA/FDD uplink. The proposed sounding algorithm tries to provide a PF scheduler with more proper channel state information of multiple users by using an estimated PF metric. It is shown that the proposed sounding subband allocation algorithm enables the PF scheduler to achieve the throughput gain and guarantee fairness at the same time.
Improving handoff QoS with or without mobility prediction
Modified channel shortening receiver based on MSSNR algorithm for UWB channels
Power control for spatial multiplexing with MMSE receiver
Sounding subband allocation algorithm for proportional fair scheduling in OFDMA/FDD uplink
-
- Author(s): T. Sugawara ; S. Makio ; M. Takahashi ; H. Sano ; M. Shishikura ; N. Kikuchi
- Source: Electronics Letters, Volume 43, Issue 9, p. 540 –542
- DOI: 10.1049/el:20070179
- Type: Article
- + Show details - Hide details
-
p.
540
–542
(3)
Highly refractive silicon etalons have been used to reduce the insertion loss from 4.4 to 2.3 dB and a 40 Gbit/s tunable dispersion compensator with a ±250 ps/nm tunable range and <±1.5 ps group-delay ripple has been developed. Owing to the low-group-delay ripple, a 1000 ps/nm tunable range in a double-pass configuration is demonstrated. - Author(s): H. Chen ; M. Chen ; C. Qiu ; J. Zhang ; S. Xie
- Source: Electronics Letters, Volume 43, Issue 9, p. 542 –543
- DOI: 10.1049/el:20070042
- Type: Article
- + Show details - Hide details
-
p.
542
–543
(2)
A novel method to generate ultra-wideband (UWB) monocycle pulses based on birefringence time delay in polarisation-maintaining fibre (PMF) is proposed and experimentally demonstrated. Two polarity-reverse pulses are generated by polarisation modulation using a single phase modulator. They are delayed in PMF with enough time to generate monocycle pulse.
Low-loss 40 Gbit/s tunable dispersion compensator using highly refractive angled etalons with multiple reflections
UWB monocycle pulse generation by optical polarisation time delay method
-
- Author(s): R.J.W. Hill ; D.A.J. Moran ; X. Li ; H. Zhou ; D. Macintyre ; S. Thoms ; R. Droopad ; M. Passlack ; I.G. Thayne
- Source: Electronics Letters, Volume 43, Issue 9, p. 543 –545
- DOI: 10.1049/el:20070427
- Type: Article
- + Show details - Hide details
-
p.
543
–545
(3)
Data is reported from 180 nm gate length GaAs n-MOSFETs with drive current (Ids,sat) of 386 µA/µm (Vg=Vd=1.5 V), extrinsic transconductance (gm) of 426 µS/µm, gate leakage ( jg,limit) of 44 nA/cm2, and on resistance (Ron) of 1640 Ω µm. The gm and Ron metrics are the best values reported to date for III–V MOSFETs, and indicate their potential for scaling to deca-nanometre dimensions. - Author(s): J.-D. Choe ; Y.J. Ahn ; S.-H. Lee ; D. Jang ; Y.-B. Yoon ; J.J. Lee ; I. Chung ; K. Park ; D. Park
- Source: Electronics Letters, Volume 43, Issue 9, p. 545 –546
- DOI: 10.1049/el:20070605
- Type: Article
- + Show details - Hide details
-
p.
545
–546
(2)
The engineered trap layer with nanocrystal and high-k blocking oxide are applied to the FinFET structure. The increased trap density of the hybrid nanocrystal trap layer and the enhanced leakage reduction of AlxOy are proposed as a dominant role of the larger program and erase window of 8.3 V which is applicable to the MLC Flash memory device.
180 nm metal gate, high-k dielectric, implant-free III–V MOSFETs with transconductance of over 425 µS/µm
Hybrid nanocrystal FinFET with large P/E window for MLC NAND Flash memory application
-
- Author(s): S. Nadarajah
- Source: Electronics Letters, Volume 43, Issue 9, p. 546 –547
- DOI: 10.1049/el:20070267
- Type: Article
- + Show details - Hide details
-
p.
546
–547
(2)
In a Letter in 2003, L.E. Miller derived autocorrelation functions for ultra-wideband pulses based on Hermite polynomials. It is pointed out here that equation (1) of that Letter and hence the subsequent results are incorrect. A correct and elementary expression is derived for the autocorrelation function of Hermite-Gauss pulses. - Author(s): F. Cong ; X. Xu ; S. Zhou ; S. Du ; X. Shi
- Source: Electronics Letters, Volume 43, Issue 9, p. 547 –549
- DOI: 10.1049/el:20070304
- Type: Article
- + Show details - Hide details
-
p.
547
–549
(3)
Noisy blind source separation (BSS) is studied. The proposed method mainly consists of two stages. The first step is to enhance each mixture by particle filtering so that (as in the theory) the noisy mixtures become noise-free. The second is to extract the sources by BSS algorithms. For particle filtering, the state-space model is defined by the time-varying autoregressive model of each mixture, and the measured space is set by each observed noisy mixture. Various simulations prove that the approach is effective.
Comments on ‘Autocorrelation functions for Hermite-polynomial ultra-wideband pulses’
Particle filtering based noisy blind source separation
Most viewed content for this Journal
Article
content/journals/el
Journal
5
Most cited content for this Journal
-
Extreme multistability in a memristive circuit
- Author(s): Bo-Cheng Bao ; Quan Xu ; Han Bao ; Mo Chen
- Type: Article
-
Absorptive frequency selective surface using parallel LC resonance
- Author(s): Qiang Chen ; Liguo Liu ; Liang Chen ; Jiajun Bai ; Yunqi Fu
- Type: Article
-
Partial spectral search-based DOA estimation method for co-prime linear arrays
- Author(s): Fenggang Sun ; Peng Lan ; Bin Gao
- Type: Article
-
Experimental verification of on-chip CMOS fractional-order capacitor emulators
- Author(s): G. Tsirimokou ; C. Psychalinos ; A.S. Elwakil ; K.N. Salama
- Type: Article
-
54 Gbit/s OOK transmission using single-mode VCSEL up to 2.2 km MMF
- Author(s): G. Stepniak ; A. Lewandowski ; J.R. Kropp ; N.N. Ledentsov ; V.A. Shchukin ; N. Ledentsov Jr. ; G. Schaefer ; M. Agustin ; J.P. Turkiewicz
- Type: Article
