# Electronics Letters

## Filter Results

Displaying Results 1 - 25 of 51
• ### Classification based on neural similarity

Publication Year: 2002, Page(s):810 - 812
| | PDF (342 KB)

Following the approach of extracting similarity metrics directly from labelled data, a standard back-propagation neural network is adopted to determine a degree of similarity between pairs of input points. The similarity computed by the network is then used to guide a k-NN classifier, which associates a label with an unknown pattern based on the k most similar points. Experimental results on both ... View full abstract»

• ### Low-power CSD linear phase FIR filter structure using vertical common sub-expression

Publication Year: 2002, Page(s):777 - 779
Cited by:  Papers (26)
| | PDF (325 KB)

A high-speed/low-power canonic signed digit (CSD) linear phase finite impulse response (FIR) filter structure using vertical common sub-expression is proposed. In the conventional linear phase CSD filter, the horizontal common sub-expression method (see Hartley, 1996) has been widely utilised due to the inherent symmetrical filter coefficients. However, use has been made of the fact that the most ... View full abstract»

• ### Alleviating overfitting' via genetically-regularised neural network

Publication Year: 2002, Page(s):809 - 810
Cited by:  Papers (1)
| | PDF (280 KB)

A hybrid genetic algorithm/scaled conjugate gradient regularisation method is designed to alleviate ANN over-fitting'. In application to day-ahead load forecasting, the proposed algorithm performs better than early-stopping and Bayesian regularisation, showing promising initial results View full abstract»

• ### BIST scheme for DAC testing

Publication Year: 2002, Page(s):776 - 777
Cited by:  Papers (10)
| | PDF (278 KB)

A low-cost, built-in self-test (BIST) scheme for a digital-to-analogue converter (DAC) is presented. The basic idea is to convert the DAC output voltages corresponding to different input codes into different oscillation frequencies through a voltage controlled oscillator (VCO), and further transfer these frequencies to different digital codes using a counter. According to the input and output code... View full abstract»

• ### Surface emitting lasers by selective area epitaxy for optical clock distribution

Publication Year: 2002, Page(s):794 - 795
Cited by:  Papers (1)
| | PDF (285 KB)

The integration of a laser diode with a passive waveguide distribution network for use in an optical clock distribution system is demonstrated. The integration concept is demonstrated by utilising selective area epitaxy and etched surface gratings to create active and passive components for signal generation and distribution View full abstract»

Publication Year: 2002, Page(s):807 - 809
Cited by:  Papers (14)  |  Patents (9)
| | PDF (326 KB)

Walsh-Hadamard (WH) codes are found to be well characterised in the frequency domain. With this unique feature, a simple spreading code allocation scheme is proposed for downlink MC-CDMA employing WH codes View full abstract»

• ### Test structure for crosstalk characterisation

Publication Year: 2002, Page(s):774 - 776
| | PDF (327 KB)

Based on the characterisation of an industrial driver library in terms of crosstalk-induced noise possibility, a specific test structure to measure crosstalk signal on interconnect lines is presented. An original implementation is proposed for direct amplitude and pulse width measurement of the crosstalk-induced parasitic signal. A validation is given with HSPICE simulation of the extracted layout... View full abstract»

• ### Vertically periodic defected ground structure for planar transmission lines

Publication Year: 2002, Page(s):803 - 804
Cited by:  Papers (2)
| | PDF (266 KB)

A vertically periodic defected ground structure (VPDGS) for microstrip is described. VPDGS has additional vertical periodicity of defects plus the conventional horizontal periodicity on the ground plane. The slow-wave factors and the predicted and measured performances are presented View full abstract»

• ### Low-loss flat-top passband arrayed waveguide gratings realised by first-order mode assistance method

Publication Year: 2002, Page(s):792 - 794
Cited by:  Papers (5)  |  Patents (2)
| | PDF (336 KB)

A novel method of flattening the passband of an arrayed waveguide grating with a small excess loss is described, which employs a new concept that uses the assistance of the weak first-order mode. A 16-channel 100 GHz-spacing demultiplexer with a fibre-to-fibre loss of less than 3.6 dB and a flattened excess loss of 1.85 dB is demonstrated. The 1 dB down passband is widened 2.2 times View full abstract»

• ### Median M-type K-nearest neighbour (MM-KNN) filter to remove impulse noise from corrupted images

Publication Year: 2002, Page(s):786 - 787
Cited by:  Papers (6)
| | PDF (266 KB)

The median M-type K-nearest neighbour (MM-KNN) filter to remove impulse noise from corrupted images is presented. This filter uses R and M estimators combined with different influence functions. Simulation results have shown that the restoration performance is better than that of other known filters View full abstract»

• ### Inhomogeneous corrugations to improve RCS measurements

Publication Year: 2002, Page(s):769 - 771
| | PDF (316 KB)

An application of the theory of open electromagnetic problems by circuital analysis is presented for the reduction of homogeneous cylinders of radar cross-sections (RCS) without the need for other dielectric media View full abstract»

• ### Controlled scattering from PEC surface using PSS boundary

Publication Year: 2002, Page(s):780 - 781
Cited by:  Papers (1)
| | PDF (268 KB)

The use of a phase-switched-screen boundary to actively control the electromagnetic scattering properties of an uncovered planar PEC surface is described. The structure incorporates a single active layer but is capable of tuning a reflectivity null of better than -20 dB over a significant bandwidth. Theoretical predictions are compared to measured data derived from an experimental system View full abstract»

• ### Interleaver parameter-selecting strategy for DVB-RCS turbo codes

Publication Year: 2002, Page(s):805 - 807
Cited by:  Papers (1)  |  Patents (1)
| | PDF (338 KB)

Turbo codes are at present standardised for digital video broadcasting (DVB-RCS) where interleavers are defined with four parameters. A new parameter-selecting strategy is introduced to improve DVB-RCS turbo codes. The performance of DVB-RCS standard codes is compared with that of turbo codes having the newly selected parameters. Computer simulations show the improvement of turbo codes with the ne... View full abstract»

• ### Simple and accurate propagation delay model for submicron CMOS gates based on charge analysis

Publication Year: 2002, Page(s):772 - 774
Cited by:  Papers (1)
| | PDF (334 KB)

A simple method to evaluate the propagation delay of complex CMOS gates computed from inverter delay models based on the nth-power law MOSFET model is presented. The method is based on a transistor collapsing technique developed for complex gates and takes into account short-channel effects, internal coupling capacitances and the body effect. The propagation delay of complex gates for a 0.18 μm... View full abstract»

• ### 62×42.7 Gbit/s (2.5 Tbit/s) WDM signal transmission over 2200 km with broadband distributed Raman amplification

Publication Year: 2002, Page(s):818 - 819
Cited by:  Papers (3)
| | PDF (265 KB)

Transmission of 62 electrically time-division multiplexed 42.7 Gbit/s channels over 2200 km using in-line distributed Raman amplification is described. It is verified that bidirectional-pumped distributed Raman amplification, which is suitable for broadband amplification, enables 40 Gbit/s wavelength-division multiplexed signals to be transmitted within the Cand L-bands View full abstract»

• ### Using buried capacitor in LTCC-MLC balun

Publication Year: 2002, Page(s):801 - 803
Cited by:  Papers (7)  |  Patents (1)
| | PDF (315 KB)

A novel chip-type ceramic balun designed in the 2.4 GHz ISM band frequency is presented. A buried capacitor is included in the balun, so that the length of the coupled transmission lines can be reduced and can be designed very easily. A meander or spiral broadside coupled-line is adopted to realise the proposed LTCC multi-layer balun. The measured performances of phase and amplitude balance for th... View full abstract»

• ### Transparent contact studies for organic devices

Publication Year: 2002, Page(s):826 - 827
| | PDF (266 KB)

A study of thin metal films as transparent conductive contacts for organic devices is reported. Metal films such as gold (Au) and silver (Ag) have very low surface resistivities and can have excellent transparency, if they are thin. By balancing the surface resistivity and transparency, thin metal films may be used as transparent electrical contacts for organic devices View full abstract»

• ### 2.5 GHz-spaced cascaded demultiplexer for optical spectrum analyser application in C- and L-bands of optical fibre amplifiers

Publication Year: 2002, Page(s):815 - 816
Cited by:  Papers (2)
| | PDF (287 KB)

A 2.5 GHz-spaced demultiplexer with 128 output ports for use as an optical spectrum analyser covering the C- and L-bands of optical fibre amplifiers is constructed. It consists of a 160 GHz-spaced 37×74 first-stage arrayed-waveguide grating (AWG), two 1×8 optical switches and a 2.5 GHz-spaced 128-channel second-stage AWG View full abstract»

• ### Output power measurement of photonic millimetre-wave and sub-millimetre-wave emitter at 100-800 GHz

Publication Year: 2002, Page(s):798 - 800
Cited by:  Papers (13)
| | PDF (316 KB)

A photonic millimetre-wave and sub-millimetre-wave emitter (PME) that uses a log-periodic antenna and a uni-travelling carrier photodiode has been fabricated and tested. The output power and spectra of the PME were measured with a Fourier transform spectrometer and a bolometer at 100-800 GHz in a low-power excitation condition. The extrapolated output power with 15 mA photocurrent is several tens ... View full abstract»

• ### Energy-recovery circuit for plasma display panel

Publication Year: 2002, Page(s):790 - 792
Cited by:  Papers (13)  |  Patents (1)
| | PDF (336 KB)

A new energy-recovery circuit for a plasma display panel (PDP) is proposed. It features a simpler structure, less mass, higher efficiency, and fewer devices. The very stable and uniform light emitted from a PDP proves the high quality of the screen. It is suitable for hang-on-the-wall TVs which have desirable features such as thinness, lightness, high efficiency, and low price View full abstract»

• ### Improved, operationally-passive interferometric demodulation method using 3×3 coupler

Publication Year: 2002, Page(s):784 - 786
Cited by:  Papers (11)  |  Patents (2)
| | PDF (357 KB)

An improved algorithm for demodulating the phase output of a Mach-Zehnder interferometer that uses a 3×3 coupler is presented. Error analysis and experimental data show how a generalised 3×3 coupler description eliminates signal distortion and frequency mixing View full abstract»

• ### Error-free signal selection and high-speed channel switching by monolithically integrated 64-channel WDM channel selector

Publication Year: 2002, Page(s):823 - 824
Cited by:  Papers (7)
| | PDF (272 KB)

Bit error rate at 10 Gbit/s and channel switching characteristics of a monolithically integrated 64-channel selector were measured. Error-free operation on all channels with a typical sensitivity penalty of 1.3 dB was confirmed. Fast channel switching <1.0 ns for rise-time and <1.5 ns for fall-time were obtained View full abstract»

• ### Perceptually weighted wavelet-based codec for handheld videophone applications

Publication Year: 2002, Page(s):839 - 841
Cited by:  Papers (1)  |  Patents (3)
| | PDF (323 KB)

A wavelet-based video codec that utilises the properties of the human visual system is presented. Perceptual weights are employed in the selection and vector quantisation of the wavelet coefficients. The weights are designed for a specific viewing distance and frame size with application to communication using a handheld videophone device. The results indicate a significant improvement in frame qu... View full abstract»

• ### Computer optimised wideband dual-mode horn

Publication Year: 2002, Page(s):768 - 769
Cited by:  Papers (2)  |  Patents (1)
| | PDF (257 KB)

A wideband dual-mode horn has been manufactured from a design using mode matching analysis software embedded within an automatic optimisation loop. The horn consists of a smooth-walled conical horn section with a mode transducer comprising a number of optimised cylindrical waveguide steps. The final breadboard model achieves a peak cross-polarisation level of <-30 dB over a 20% bandwidth View full abstract»

• ### High-speed division architecture for GF(2m)

Publication Year: 2002, Page(s):835 - 836
Cited by:  Papers (6)
| | PDF (259 KB)

A new division architecture for GF(2m) with standard basis representation is presented. The proposed architecture is based on a modified version of the binary extended greatest common divisor algorithm; it reduces computational delay time and hardware complexity View full abstract»

## 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