Online ISSN
1350-911X
Print ISSN
0013-5194
Electronics Letters
Volume 43, Issue 2, 18 January 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 2
18 January 2007
-
- Author(s): D.G. Cunningham and I.H. White
- Source: Electronics Letters, Volume 43, Issue 2, p. 63 –65
- DOI: 10.1049/el:20073871
- Type: Article
- + Show details - Hide details
-
p.
63
–65
(3)
The worst case Shannon capacities of OM1, OM2 and OM3 multimode fibre types are calculated. The worst case capacity length products are estimated to be 15 Gigabit per second kilometres (Gbit/s.km) for a single wavelength channel at 1300 nm wavelength and 60 Gbit/s.km for OM3 for operation at 850 nm wavelength. - Author(s): C. Toumazou and L. Shepherd
- Source: Electronics Letters, Volume 43, Issue 2, p. 65 –67
- DOI: 10.1049/el:20073870
- Type: Article
- + Show details - Hide details
-
p.
65
–67
(3)
A fundamental relationship exists between diffusion characteristics within semiconductors and Nernstian equilibrium in biological systems. In a transistor operating in weak inversion the potential difference between terminals governs electron concentration in an exponential way according to the Boltzmann distribution of charged particles while in a biochemical cell the potential difference across a membrane is governed by ionic concentration in a logarithmic way according to the Nernst equation. These two nonlinear physical phenomena form an interaction that potentially leads to linearisation and subsequent modelling of or interaction with biological systems by integrated semiconductor devices. To demonstrate the authors' hypothesis a silicon transistor-based biosensor is considered. This natural bridge between biochemistry and semiconductor silicon chips will enable the potential mass production of portable biochemical devices for the consumer market.
Does multimode fibre have a future in data-communications?
Using transistors to linearise biochemistry
-
- Author(s): Z. Xu ; Y. Zakharov ; G. White
- Source: Electronics Letters, Volume 43, Issue 2, p. 67 –69
- DOI: 10.1049/el:20072947
- Type: Article
- + Show details - Hide details
-
p.
67
–69
(3)
Array pattern optimisation based on semidefinite programming is proposed to improve the coverage performance of cellular communications from High Altitude Platforms (HAPs). This optimisation, when applied to a linear vertical array of N omnidirectional antenna elements, allows a coverage performance better than that of an array of N narrowbeam aperture antennas forming hexagonal cells on the ground. In addition to performance enhancement, the HAP antenna payload can be significantly reduced. - Author(s): Q. Wu ; R. Jin ; J. Geng ; M. Ding
- Source: Electronics Letters, Volume 43, Issue 2, p. 69 –70
- DOI: 10.1049/el:20072304
- Type: Article
- + Show details - Hide details
-
p.
69
–70
(2)
Presented is a new CPW-fed quasi-circular monopole antenna, which is composed of a triangle and its tangent circle. This smooth monopole structure reduces the dimensions and improves impedance bandwidth dramatically. The CPW ground is bevelled to form a 50 to 100 Ω impedance transformer. The measured bandwidth defined by VSWR<2 is from 2.55 to 18.5 GHz, i.e. a ratio of about 7.3:1. The proposed monopole exhibits a nearly omnidirectional radiation pattern with very compact size and simple structure, which is suitable for various military and commercial wideband applications. - Author(s): V. Deepu ; K.R. Rohith ; J. Manoj ; M.N. Suma ; K. Vasudevan ; C.K. Aanandan ; P. Mohanan
- Source: Electronics Letters, Volume 43, Issue 2, p. 70 –72
- DOI: 10.1049/el:20073417
- Type: Article
- + Show details - Hide details
-
p.
70
–72
(3)
A compact dual-band uniplanar antenna for operation in the 2.4/5.2/5.8 GHz WLAN/HIPERLAN2 communication bands is presented. The dual-band antenna is obtained by modifying one of the lateral strips of a slot line, thereby producing two different current paths. The antenna occupies a very small area of 14.5×16.6 mm2 including the ground plane on a substrate having dielectric constant 4.4 and thickness 1.6 mm at 2.2 GHz. The antenna resonates with two bands from 2.2 to 2.52 GHz and from 5 to 10 GHz with good matching, good radiation characteristics and moderate gain. - Author(s): F. Xiao ; X. Tang ; L. Guo ; T. Wu
- Source: Electronics Letters, Volume 43, Issue 2, p. 72 –73
- DOI: 10.1049/el:20073521
- Type: Article
- + Show details - Hide details
-
p.
72
–73
(2)
The split-step finite difference time domain (SS-FDTD) method characterised by unconditional stability is becoming an important numerical method in computational electromagnetics. Proposed is a new high-order accurate unconditionally stable SS-FDTD method, which is derived from the exponential evolution operator. Compared with the conventional SS-FDTD method, the numerical dispersion of the new method is greatly reduced. - Author(s): E. Peytavit ; J-F. Lampin ; T. Akalin ; L. Desplanque
- Source: Electronics Letters, Volume 43, Issue 2, p. 73 –75
- DOI: 10.1049/el:20073679
- Type: Article
- + Show details - Hide details
-
p.
73
–75
(3)
A terahertz transverse electromagnetic horn antenna (THz-TEMHA) monolithically integrated on a gallium arsenide substrate has been studied by means of subpicosecond pulses generated and measured on a 50 Ω coplanar waveguide. The measured reflection coefficient is below −10 dB from 100 GHz to about 1 THz. A terahertz ranging experiment was carried out in a monostatic configuration. - Author(s): M.S.J. Singh ; S.I.S. Hassan ; M.F. Ain ; F. Ghani ; K. Igarashi ; K. Tanaka ; M. Iida
- Source: Electronics Letters, Volume 43, Issue 2, p. 75 –77
- DOI: 10.1049/el:20072677
- Type: Article
- + Show details - Hide details
-
p.
75
–77
(3)
A model for predicting rain attenuation on Earth-to-space is developed by using the measured data obtained from tropical and equatorial regions that was revised from the ITU model. The proposed rain attenuation model uses the complete rainfall rate cumulative distribution as input data. It is shown that significant improvements in terms of prediction error over existing attenuation models are obtained. - Author(s): W.-L. Liu ; T.-R. Chen ; S.-H. Chen ; J.-S. Row
- Source: Electronics Letters, Volume 43, Issue 2, p. 77 –78
- DOI: 10.1049/el:20073373
- Type: Article
- + Show details - Hide details
-
p.
77
–78
(2)
A microstrip antenna with the functions of switchable pattern and polarisation is presented. The antenna is composed of a square-ring radiating patch and four shorting walls. The shorting walls are connected to each edge of the square-ring patch through one pin diode. By controlling the states of the pin diodes, the square-ring microstrip antenna can radiate two complementary patterns (conical and broadside); moreover, dual orthogonal linear polarisations are provided for the broadside radiation. These diversity functions are operated at the same frequency band. An antenna prototype has been implemented and the results obtained are given. - Author(s): D.G. Babas and J.N. Sahalos
- Source: Electronics Letters, Volume 43, Issue 2, p. 78 –80
- DOI: 10.1049/el:20073391
- Type: Article
- + Show details - Hide details
-
p.
78
–80
(3)
A method for non-uniformly spaced series-fed rectangular microstrip array synthesis is given. By this approach the problem of patch array design turns out to be slot array synthesis. The resulting equivalent configuration gives the necessary parameters for the microstrip array geometry. Applications on Taylor, Bayliss and shaped-beam patterns show the validity of the method.
Antenna array optimisation using semidefinite programming for cellular communications from HAPs
Compact CPW-fed quasi-circular monopole with very wide bandwidth
Compact uniplanar antenna for WLAN applications
High-order accurate split-step FDTD method for solution of Maxwell's equations
Integrated terahertz TEM horn antenna
Rain attenuation model for South East Asia countries
Reconfigurable microstrip antenna with pattern and polarisation diversities
Synthesis method of series-fed microstrip antenna arrays
-
- Author(s): Y.-J. Chang
- Source: Electronics Letters, Volume 43, Issue 2, p. 80 –82
- DOI: 10.1049/el:20073406
- Type: Article
- + Show details - Hide details
-
p.
80
–82
(3)
An energy-efficient CAM design is introduced, in which both the match line capacitances and switching activities are minimised using a two-layer hierarchical matching method. The results measured from the fabricated chip show that, compared to the traditional NOR-type CAM, this design can deliver an energy reduction of 76% while improving the match performance by 29%.
Two-layer hierarchical matching method for energy-efficient CAM design
-
- Author(s): S.H. Lin and H.Z. Yang
- Source: Electronics Letters, Volume 43, Issue 2, p. 82 –84
- DOI: 10.1049/el:20073262
- Type: Article
- + Show details - Hide details
-
p.
82
–84
(3)
By using local redundancy, two improved soft-error-tolerant SR latches are proposed. Experimental results show that the new latches have superior delay performance compared to the traditional ones and can recover from the soft errors caused by cosmic rays and particle strikes.
Reliable SR latches design using local redundancy
-
- Author(s): C. Walravens ; S. Van Winckel ; J.M. Redouté ; M. Steyaert
- Source: Electronics Letters, Volume 43, Issue 2, p. 84 –85
- DOI: 10.1049/el:20073026
- Type: Article
- + Show details - Hide details
-
p.
84
–85
(2)
When subjected to electromagnetic interference, an operational amplifier will generate a DC offset. A thorough comparison between two approaches to reduce this offset is presented. Through mathematical deduction and simulations, it is shown that placing a lowpass filter at the input differential pair is superior to a double differential pair compensation topology.
Efficient reduction of electromagnetic interference effects in operational amplifiers
-
- Author(s): S. Moon ; B.H. Kim ; P.R. Watekar ; W.-T. Han
- Source: Electronics Letters, Volume 43, Issue 2, p. 85 –87
- DOI: 10.1049/el:20073559
- Type: Article
- + Show details - Hide details
-
p.
85
–87
(3)
Er3+-doped optical fibres co-doped with silicon particles were fabricated by the modified chemical vapour deposition and the solution doping technique. Peak intensity of the photoluminescence at 1560 nm upon pumping by a CW Ar-ion laser at 512 nm was enhanced by about 70% after the silicon incorporation. - Author(s): Y. Xu ; X. Ren ; Z. Wang ; X. Zhang ; Y. Huang
- Source: Electronics Letters, Volume 43, Issue 2, p. 87 –88
- DOI: 10.1049/el:20073303
- Type: Article
- + Show details - Hide details
-
p.
87
–88
(2)
Supercontinuum generation at 10 Gbit/s using a nonlinear dispersion-flattened photonic crystal fibre is experimentally demonstrated. The fibre has small normal dispersion with a variation smaller than 1.5 ps nm−1 km−1 between 1500 and 1650 nm. The supercontinuum with a flatly broadened spectrum of 92 nm (at 6 dB) in the 1.55 µm region is generated by injecting 1545 nm, 1.5 ps optical pulses into an 80 m-long fibre. - Author(s): T. Yamashita and Y. Ohishi
- Source: Electronics Letters, Volume 43, Issue 2, p. 88 –90
- DOI: 10.1049/el:20072794
- Type: Article
- + Show details - Hide details
-
p.
88
–90
(3)
0.54 µm band amplification using Tb3+-doped fluoride fibre is demonstrated. Spectroscopic properties of Tb3+-doped fluoride glass are clarified. A gain of 5.3 dB has been obtained in a 1 wt.% Tb3+-doped fluoride fibre for a signal power of −30 dBm by forward pumping at a wavelength of 0.488 µm with power of 100 mW. - Author(s): T. Guo ; J. Yang ; Q.D. Zhao ; G.L. Huang ; L.F. Xue ; H. Zhang ; X.Y. Dong
- Source: Electronics Letters, Volume 43, Issue 2, p. 90 –92
- DOI: 10.1049/el:20073379
- Type: Article
- + Show details - Hide details
-
p.
90
–92
(3)
A technique for temperature-immune pressure measurement using a strain-induced quadratic-chirped fibre Bragg grating by differential optical power detection is demonstrated. Linear pressure measurement up to 20 kPa with a resolution of 0.05 kPa and thermal stability less than 2% full-scale for a temperature range from 0 to 80°C are achieved using pin photodiodes detection, without any temperature compensation.
Fabrication and photoluminescence characteristics of Er3+-doped optical fibre sensitised by silicon
Flatly broadened supercontinuum generation at 10 Gbit/s using dispersion-flattened photonic crystal fibre with small normal dispersion
Optical amplification at 0.54 µm by Tb3+-doped fluoride fibre
Temperature-immune and intensity-referenced pressure sensor based on strain-induced quadratic-chirped fibre Bragg grating
-
- Author(s): Z.-F. Zhou and P.-L. Shui
- Source: Electronics Letters, Volume 43, Issue 2, p. 92 –93
- DOI: 10.1049/el:20073166
- Type: Article
- + Show details - Hide details
-
p.
92
–93
(2)
Contourlet is a new effective signal representation tool in many imageapplications. Proposed is a contourlet-based image denoising algorithm using directional windows which takes advantage of the captured directional information of the images. Experiments show that the proposed algorithm achieves better performance than other contourlet-based image denoising algorithms. - Author(s): A.B.B. Adikari ; W.A.C. Fernando ; W.A.R.J. Weerakkody
- Source: Electronics Letters, Volume 43, Issue 2, p. 93 –95
- DOI: 10.1049/el:20073675
- Type: Article
- + Show details - Hide details
-
p.
93
–95
(3)
Unidirectional distributed video coding (DVC) is one of the untouched areas of DVC, which has to be necessarily employed when the feedback channel is not available. Thus, to serve that purpose, proposed is a unidirectional distributed video coding using a parallel Wyner-Ziv architecture. Simulation results show that up to 6.5 dB PSNR gain can be obtained with the proposed codec over the conventional DVC codec with no feedback channel at the same bit rate and the computational cost. - Author(s): N. Cvejic ; D.R. Bull ; C.N. Canagarajah
- Source: Electronics Letters, Volume 43, Issue 2, p. 95 –96
- DOI: 10.1049/el:20073460
- Type: Article
- + Show details - Hide details
-
p.
95
–96
(2)
A novel objective non-reference metric for multimodal image sensor fusion is presented. Using the joint segmentation of the input images and entropy of the regions as the priority, an ‘ideal’ fused image is obtained. The metric is based on computing how accurately the important regions from the input images are transferred into the fused image. Experiments have shown that the obtained metric values correspond better to the subjective quality of the fused images than other state-of-the-art fusion metrics. - Author(s): Z. Gan ; L. Qi ; X. Zhu
- Source: Electronics Letters, Volume 43, Issue 2, p. 96 –98
- DOI: 10.1049/el:20072810
- Type: Article
- + Show details - Hide details
-
p.
96
–98
(3)
A low complexity motion compensated frame interpolation method using compressed-domain information based on an H.264 decoder is presented. In the proposed method, the motion vectors are estimated using the constant acceleration motion model, and the interpolation algorithm is applied based on the macroblock coded types. Results show that the proposed method provides high quality interpolation frames.
Contourlet-based image denoising algorithm using directional windows
Iterative Wyner-Ziv decoding for unidirectional distributed video coding
Metric for multimodal image sensor fusion
Motion compensated frame interpolation based on H.264 decoder
-
- Author(s): M. Motoyoshi and M. Fujishima
- Source: Electronics Letters, Volume 43, Issue 2, p. 98 –100
- DOI: 10.1049/el:20073338
- Type: Article
- + Show details - Hide details
-
p.
98
–100
(3)
A 58.8/39.2 GHz dual-modulus inductor-less frequency divider is proposed. The divider was fabricated using 90 nm CMOS with 9.2×5.2 µm core size. As a result, without using an inductor, the operating frequency was 40 GHz in the divide-by-2 mode and 59 GHz in the divide-by-3 mode at a power-supply voltage of 1.15 V with a power consumption of 1.2 mW. - Author(s): B.B.M. Wasanthamala Badalawa and M. Fujishima
- Source: Electronics Letters, Volume 43, Issue 2, p. 100 –102
- DOI: 10.1049/el:20073324
- Type: Article
- + Show details - Hide details
-
p.
100
–102
(3)
A 60 GHz CMOS pulse generator (PG) is presented for the wireless transmission of uncompressed HDTV data, and is realised by only CMOS transistors. The CMOS PG was fabricated using a 90 nm CMOS process with nine metal layers. A carrier frequency of 62.5 GHz was obtained at a supply voltage of 1.15 V with an output power of −25 dBm. The power consumption was 11.5 mW at 1.5 GHz input frequency. - Author(s): S.-F. Chang ; W.-L. Chen ; C.-H. Hsu
- Source: Electronics Letters, Volume 43, Issue 2, p. 102 –103
- DOI: 10.1049/el:20072695
- Type: Article
- + Show details - Hide details
-
p.
102
–103
(2)
A dual-band variable-gain amplifier (DBVGA) is presented for integrated 2.2 GHz 3G-WCDMA and 5.2 GHz WLAN transceivers. DBVGA employs a DC-and-RF current steering technique for gain control, which can minimise variations of the noise, 1 dB gain compression point, and input/output impedance when the gain is tuned. The appropriate frequency operation band of DBVGA is jointly controlled by the switched-resonator load and the input stage gate bias, resulting in high cross-band isolation and out-of-band interference rejection. All circuits except the input stages are reused for both bands to have high component reuse. A fully-integrated 0.18 µm CMOS DBVGA has been implemented to verify the proposed design. - Author(s): J. Lee ; I. Nam ; S. Cho ; K. Lee
- Source: Electronics Letters, Volume 43, Issue 2, p. 103 –105
- DOI: 10.1049/el:20072779
- Type: Article
- + Show details - Hide details
-
p.
103
–105
(3)
The proposed RF front-end circuits consist of a low noise amplifier using an on-chip transformer and a downconversion mixer using a parasitic vertical bipolar junction transistor and have been implemented in 0.18 µm deep n-well CMOS process. A gain of 33 dB, an IIP3 of −12 dBm, and a DSB noise figure of 4.5 dB have been achieved while consuming 5 mW from a 1.8 V supply.
58.8/39.2 GHz dual-modulus CMOS frequency divider with 9.2×5.2 µm core size
60 GHz CMOS pulse generator
CMOS dual-band variable-gain amplifier for 3G-WCDMA and WLAN dual-mode RF receivers
Highly linear and low noise 2.4 GHz RF front-end circuits using transformer and vertical NPN BJT
-
- Author(s): J.-Y. Kim ; S. Cho ; S.-M. Lee ; G.B. Kim ; J. Lee ; J. Yoo ; K.-S. Kim ; T. Kim ; Y. Park
- Source: Electronics Letters, Volume 43, Issue 2, p. 105 –107
- DOI: 10.1049/el:20072787
- Type: Article
- + Show details - Hide details
-
p.
105
–107
(3)
The effect of the birefringence of an intracavity diamond heat spreader on the lasing performance of a vertical external cavity surface emitting laser is investigated. The birefringence in the intra-cavity diamond caused considerable additional round-trip loss when a birefringent filter was inserted into the cavity. The effect of the birefringence of intra-cavity diamond can be reduced by rotation of the sample. By aligning the axes of the diamond birefringence and those of the Brewster surfaces, a pump-power limited green output power of 5.2 W was achieved – a pump to green conversion efficiency of 24%. - Author(s): K. Sakai and S. Noda
- Source: Electronics Letters, Volume 43, Issue 2, p. 107 –108
- DOI: 10.1049/el:20073012
- Type: Article
- + Show details - Hide details
-
p.
107
–108
(2)
Doughnut-shaped beams can trap low-index or non-transparent particles. It is demonstrated that a TEM01* mode beam emitted directly by a photonic-crystal (PC) laser can stably trap metal particles in two dimensions. Replacing a conventional Gaussian-beam laser with a PC laser overcomes the limits of conventional optical tweezers, thereby opening the way for novel applications. - Author(s): R. Wilk ; A. Klehr ; M. Mikulics ; T. Hasek ; M. Walther ; M. Koch
- Source: Electronics Letters, Volume 43, Issue 2, p. 108 –110
- DOI: 10.1049/el:20073415
- Type: Article
- + Show details - Hide details
-
p.
108
–110
(3)
Optoelectronic generation of continuous THz radiation with a compact, high power DFB laser which operates simultaneously on two longitudinal modes corresponding to the fundamental and first-order lateral modes is demonstrated. The spectral mode spacing is 0.45 nm. THz emission is obtained by mixing the two-line laser emission in an LT-GaAs0.81Sb0.19 photomixer.
Highly efficient green VECSEL with intra-cavity diamond heat spreader
Optical trapping of metal particles in doughnut-shaped beam emitted by photonic-crystal laser
Terahertz generation with 1064 nm DFB laser diode
-
- Author(s): M.K. Mandal and S. Sanyal
- Source: Electronics Letters, Volume 43, Issue 2, p. 110 –111
- DOI: 10.1049/el:20072547
- Type: Article
- + Show details - Hide details
-
p.
110
–111
(2)
A signal interference technique is proposed to design a compact wideband bandstop filter (BSF). Two parallel transmission lines of different lengths and characteristic impedances are used. The signal propagates through these two paths and interferes at the other end with different phases and magnitudes. By varying these phases and magnitudes two finite transmission zeros can be obtained. To improve the stopband rejection level another zero is obtained using an open-circuited quarter-wavelength stub at the stopband centre frequency (fc). One single section prototype fabricated BSF of fc=0.449 GHz has 3 and 40 dB fractional bandwidths of 50.6 and 22.3%, respectively. The filter implementation area is 0.116λg×0.163λg, λg being the guided wavelength at fc. - Author(s): J. Wang ; B.-Z. Wang ; Y.-X. Guo ; L.C. Ong ; S. Xiao
- Source: Electronics Letters, Volume 43, Issue 2, p. 111 –113
- DOI: 10.1049/el:20073191
- Type: Article
- + Show details - Hide details
-
p.
111
–113
(3)
A compact slow-wave microstrip rat-race ring coupler is presented. The new structure effectively reduces the occupied area to 8% of the conventional rat-race ring coupler due to the slow-wave effect. The design is validated both by using the full-wave electromagnetic simulator and by measurement. - Author(s): B. Liu ; W. Hong ; Y. Zhang ; J.X. Chen ; K. Wu
- Source: Electronics Letters, Volume 43, Issue 2, p. 113 –114
- DOI: 10.1049/el:20073127
- Type: Article
- + Show details - Hide details
-
p.
113
–114
(2)
Based on a newly proposed guided wave structure of half-mode substrate integrated waveguide (HMSIW), a narrow-wall double-slot 3 dB directional coupler is proposed, which keeps the advantages of an SIW coupler but with a reduction of nearly one-half in size and better isolation. Simulated results are consistent with the measured data.
Compact bandstop filter using signal interference technique
Compact slow-wave microstrip rat-race ring coupler
Half-mode substrate integrated waveguide (HMSIW) double-slot coupler
-
- Author(s): A.K.S. Al-Bayati
- Source: Electronics Letters, Volume 43, Issue 2, p. 115 –116
- DOI: 10.1049/el:20072793
- Type: Article
- + Show details - Hide details
-
p.
115
–116
(2)
A blind approach for detection in MIMO/BPSK systems is proposed. This new approach is based on certain phase modification on the transmitted data. While the approach provides significant savings in the channel throughput by avoiding use of training sequences, experiments demonstrate that its performance is very close to an MMSE receiver with perfect channel knowledge.
Blind detection in MIMO/BPSK systems based on phase encoding
-
- Author(s): Z. Zhang ; S.W. Cheung ; T.I. Yuk
- Source: Electronics Letters, Volume 43, Issue 2, p. 116 –117
- DOI: 10.1049/el:20073177
- Type: Article
- + Show details - Hide details
-
p.
116
–117
(2)
A novel upper bound is proposed using correct probability for evaluation of block-error rate of space-time codes at low signal-to-noise ratio. Analytical and numerical results show that, at low SNR, the proposed bound is tighter and more accurate than that of the Union Bound using the pair-wise error probability.
Upper bound for block-error rate of S-T codes
-
- Author(s): H. Hasegawa ; Y. Oikawa ; M. Nakazawa
- Source: Electronics Letters, Volume 43, Issue 2, p. 117 –119
- DOI: 10.1049/el:20073781
- Type: Article
- + Show details - Hide details
-
p.
117
–119
(3)
Described is a 10 Gbit/s transmission at 850 nm realised using a 2 km-long singlemode photonic crystal fibre and a directly modulated singlemode vertical surface-emitting laser (VCSEL). Power penalty-free transmission was successfully achieved without an optical amplifier or a modulator. - Author(s): F. Zeng ; Q. Wang ; J. Yao
- Source: Electronics Letters, Volume 43, Issue 2, p. 119 –121
- DOI: 10.1049/el:20073432
- Type: Article
- + Show details - Hide details
-
p.
119
–121
(3)
All-optical ultra-wideband (UWB) impulse generation based on optical cross-phase modulation (XPM) and frequency discrimination is proposed and experimentally demonstrated. In the proposed configuration, an optical pulse train from a femtosecond pulse laser that is spectrum sliced to get the required pulse width is used as a pump, which is then injected into a nonlinear fibre together with a continuous-wave (CW) probe to create XPM. A fibre Bragg grating (FBG) is used as a frequency discriminator. By locating the cross-phase-modulated probe at the linear or the quadrature slopes of the FBG reflection spectrum, UWB monocycle or doublet pulses are generated. - Author(s): H. Kawakami ; E. Yoshida ; Y. Miyamoto ; M. Oguma
- Source: Electronics Letters, Volume 43, Issue 2, p. 121 –122
- DOI: 10.1049/el:20073697
- Type: Article
- + Show details - Hide details
-
p.
121
–122
(2)
The first demonstration is described of the quality degradation in a differential quadrature phase shift keying (DQPSK) receiver due to the polarisation dependent wavelength response (PDλ) of a Mach-Zehnder interferometer (MZI) and carrier frequency drifting. In the method, the value of PDλ and the corresponding penalty can be measured simultaneously at the receiver. Experimental data shows good agreement with the analysis. - Author(s): M. Attygalle ; T. Anderson ; N. Nadarajah ; T. Nirmalathas
- Source: Electronics Letters, Volume 43, Issue 2, p. 122 –124
- DOI: 10.1049/el:20073528
- Type: Article
- + Show details - Hide details
-
p.
122
–124
(3)
An optical seeding source with a single phase modulator is used for cost-effective upstream transmission in a super-dense WDM-PON (SDWDM-PON) in conjunction with reflective semiconductor optical amplifiers (RSOAs) at the optical network units. The scheme is suited for simple upgrade from a 100 GHz channel spaced DWDM-PON. The scheme is experimentally demonstrated in an SDWDM-PON with 12.5 GHz channel spacing and 1.25 Gbit/s data rate per channel.
10 Gbit/s 2 km photonic crystal fibre transmission with 850 nm directly modulated singlemode VCSEL
All-optical UWB impulse generation based on cross-phase modulation and frequency discrimination
Analysing the penalty induced by PDλ of MZI in DQPSK receiver using novel measuring technique
Low cost seeding source for migration towards super-dense WDM passive optical networks
-
- Author(s): G. Moreau ; A. Martinez ; D.-Y. Cong ; K. Merghem ; A. Miard ; A. Lemaitre ; P. Voisin ; A. Ramdane
- Source: Electronics Letters, Volume 43, Issue 2, p. 124 –125
- DOI: 10.1049/el:20073515
- Type: Article
- + Show details - Hide details
-
p.
124
–125
(2)
The potential of an InGaAs/GaAs quantum-dot-based phase modulator for broadband (>100 nm) applications at 1.55 µm is demonstrated. A ∼35% enhancement of the phase variation (Vπ ∼ 3.5 V for 4 mm-long devices) is achieved compared to that obtained with bulk GaAs waveguides.
InGaAs/GaAs QD-based electro-optic modulator with over 100 nm bandwidth at 1.55 µm
-
- Author(s): Y. Konishi and Y.F. Huang
- Source: Electronics Letters, Volume 43, Issue 2, p. 125 –127
- DOI: 10.1049/el:20073336
- Type: Article
- + Show details - Hide details
-
p.
125
–127
(3)
A novel soft-switching buck boost converter using a pulse current regenerative snubber is presented. The proposed soft-switching circuit consists of passive components that configure snubber and regenerative resonant circuit. It is shown that the effective soft-switching operation region and its efficiency improvement result on the basis of experimental evaluations.
Soft-switching buck boost converter using pulse current regenerative resonant snubber
-
- Author(s): D.H. Kim ; V. Kumar ; G. Chen ; A.M. Dabiran ; A.M. Wowchak ; A. Osinsky ; I. Adesida
- Source: Electronics Letters, Volume 43, Issue 2, p. 127 –128
- DOI: 10.1049/el:20073550
- Type: Article
- + Show details - Hide details
-
p.
127
–128
(2)
The effects of atomic-layer-deposited (ALD) Al2O3 passivation layer on AlGaN/GaN HEMTs on SiC were studied. Improved pulsed I–V characteristics and a relatively small decrease in the unity gain cutoff frequency (fT) and the maximum frequency of oscillation (fmax) were observed in the devices passivated using a 45 nm-thick ALD Al2O3 layer. For 0.12 µm gatelength devices, fT (fmax) decreased to 92 GHz (115 GHz) from 120 GHz (140 GHz), while for 0.25 µm devices, fT (fmax) decreased to 58 GHz (120 GHz) from 65 GHz (137 GHz). At a drain bias of 15 V, an output power of 3 W/mm with an associated gain of 5.0 dB and PAE of 33% were obtained for the 0.25 µm gatelength devices. - Author(s): M. Wolborski ; M. Bakowski ; A. Schöner
- Source: Electronics Letters, Volume 43, Issue 2, p. 129 –130
- DOI: 10.1049/el:20073494
- Type: Article
- + Show details - Hide details
-
p.
129
–130
(2)
A substantial reduction of the leakage current in 4H-SiC pin diodes is observed after <10 eV UV irradiation in air. The high energy UV is believed to remove carbon clusters from the SiC surface. Comparison of leakage current in 4H-SiC pin diodes after different surface treatments, including reactive ion etching, exposure to two different sources of UV light and different forms of chemical cleaning, is presented. Exposure to 4.9 eV UV light in nitrogen atmosphere enhances the leakage by one order of magnitude.
ALD Al2O3 passivated MBE-grown AlGaN/GaN HEMTs on 6H-SiC
Reduction of leakage current of 4H-SiC pin diodes after UV light exposure
-
- Author(s): B. Jiang and F.H. Chen
- Source: Electronics Letters, Volume 43, Issue 2, p. 130 –131
- DOI: 10.1049/el:20073323
- Type: Article
- + Show details - Hide details
-
p.
130
–131
(2)
A high precision time delay estimation method is proposed based on the minimum variance distortionless response (MVDR) cross spectrum. The time delay between two sensor signals is estimated from the phase of the MVDR spectrum without maximum searching. Simulation results show the performance improvements of the proposed algorithm.
High precision time delay estimation using generalised MVDR cross spectrum
-
- Author(s): L. Tan ; G. Peng ; S. Chan
- Source: Electronics Letters, Volume 43, Issue 2, p. 131 –133
- DOI: 10.1049/el:20072966
- Type: Article
- + Show details - Hide details
-
p.
131
–133
(3)
To improve the robustness of the random exponential marking (REM) scheme, it is proposed to apply an update function to the dynamics of the price in REM. By simulations, the performance improvement over REM and another approach of making REM adaptive is demonstrated.
Adaptive REM: random exponential marking with improved robustness
-
- Author(s): J.G. Wen ; K. Hashimoto ; T. Omori ; M. Yamaguchi
- Source: Electronics Letters, Volume 43, Issue 2, p. 133 –135
- DOI: 10.1049/el:20072911
- Type: Article
- + Show details - Hide details
-
p.
133
–135
(3)
A quad-phase surface acoustic wave filter is designed as a power divider/combiner for RF power amplifiers. Due to its function it is equivalent to a quadrature hybrid with embedded balun and filter, and when applied to a balanced dual-fed push-pull PA configuration the effectiveness is demonstrated.
Using quad-phase surface acoustic wave filters as power divider/combiner for RF power amplifiers
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
