# Electronics Letters

## Filter Results

Displaying Results 1 - 25 of 66
• ### 10Gbit/s repeaterless transmission experiment of optical duobinary modulated signal

Publication Year: 1995, Page(s):1359 - 1361
Cited by:  Papers (19)  |  Patents (4)
| | PDF (244 KB)

The repeaterless transmission of an optical duobinary modulated signal at 10 Gbit/s is reported. The power penalty due to the fibre chromatic dispersion is effectively reduced in comparison with conventional binary intensity modulated (1 M) signals. In the case of a 164km standard singlemode fibre the power penalty is <1.8 dB View full abstract»

• ### Neural network restoration of images suffering space-variant distortion

Publication Year: 1995, Page(s):1358 - 1359
Cited by:  Papers (3)
| | PDF (148 KB)

A neural network algorithm for the restoration of images suffering space-variant distortion is introduced. Using multiple weighting matrices to represent space-variance, the algorithm provides high quality restorations in a computationally inexpensive fashion View full abstract»

• ### M-ary PSK burst mode transmission in multipath channels

Publication Year: 1995, Page(s):1326 - 1328
| | PDF (232 KB)

A novel and efficient burst mode transmission method is presented. M-ary PSK bursts were transmitted through an underwater acoustic channel exhibiting long time spread multipath behaviour, and a DPSK detector was used at the receiver. The phase constellation plots obtained show that up to eight phases can be resolved without evidence of errors in the received data View full abstract»

• ### Analogue VLSI integrate-and-fire' neuron with frequency adaptation

Publication Year: 1995, Page(s):1357 - 1358
Cited by:  Papers (16)  |  Patents (2)
| | PDF (160 KB)

A silicon neuron with separated integrate' and `fire' representations is presented. The neuron is simple and requires a modest number of transistors, but preserves a number of temporal characteristics of physiological neurons: temporal integration, passive conductance, after-hyperpolarisation, absolute refractory period, and frequency adaptation View full abstract»

• ### Error recovery for ATM transmission over wireless channels

Publication Year: 1995, Page(s):1325 - 1326
Cited by:  Papers (1)  |  Patents (3)
| | PDF (176 KB)

The authors present a technique for efficient recovery from transmission errors to be used when transmitting ATM-like data packets in a wireless channel affected by bursty errors (jamming). Issues related to packet format error protection code structure and retransmission protocol are discussed and simulation results are shown that prove the effectiveness of the proposed approach View full abstract»

• ### Single-layer single-patch wideband microstrip antenna

Publication Year: 1995, Page(s):1310 - 1312
Cited by:  Papers (219)  |  Patents (22)
| | PDF (204 KB)

A coaxially-fed single-layer single-patch wide-band microstrip antenna in the form of a rectangular patch with a U-shaped slot is discussed. Measurements showed that this antenna can attain 10-40% impedance bandwidth without the need of adding parasitic patches in another layer or in the same layer View full abstract»

• ### Analysis of phase detector DC offset in phaselocked loop

Publication Year: 1995, Page(s):1312 - 1313
Cited by:  Papers (1)
| | PDF (164 KB)

In analogue phaselocked loops the phase detector is often a linear multiplier. The author shows that if amplitude modulation is present, a DC offset in this kind of phase detector can give rise to an additive noise signal in the demodulated baseband signal View full abstract»

• ### Trellis decoding of Reed-Solomon codes in low bit rate speech communications

Publication Year: 1995, Page(s):1331 - 1332
Cited by:  Papers (2)
| | PDF (180 KB)

The residual redundancy that persists in the transmitted parameters of a low bit rate speech coder are exploited to reduce the computational complexity of a Reed-Solomon (RS) trellis decoder. The use of RS codes for mobile telephony provides the opportunity for avoiding channel interleaving and so reduces one-way delay View full abstract»

• ### Resistive sensor for high power short pulse microwave measurement in waveguides

Publication Year: 1995, Page(s):1355 - 1357
Cited by:  Papers (4)
| | PDF (240 KB)

An X-band resistive sensor (RS) for measurement of high power microwave pulses with durations in the range 5-200 ns is presented. Using a DC pulse supply for RS feed, an output signal of the order of a few tens of volts is obtained without any amplification View full abstract»

• ### Enhanced performance direct sequence spread spectrum code acquisition

Publication Year: 1995, Page(s):1323 - 1325
| | PDF (276 KB)

The binary autodirective search technique is shown to achieve a comparative advantage in acquisition time over traditional serial search methods when synchronising to a transmitted direct sequence spread spectrum signal View full abstract»

• ### Approximate maximum likelihood differential phase detection with diversity reception

Publication Year: 1995, Page(s):1313 - 1314
| | PDF (164 KB)

Diversity reception is incorporated into the structure of approximate maximum likelihood differential phase detection (MLDPD) for M-ary DPSK. The bit error rate (BER) performance improvements obtained with MLDPD are evaluated by computer simulation for 4DPSK in frequency selective Rician fading channels View full abstract»

• ### Comparison of coplanar matching networks for V-band amplifiers

Publication Year: 1995, Page(s):1351 - 1353
| | PDF (236 KB)

Integrated single-stage amplifiers with different matching networks have been fabricated and compared, using 0.25 μm indium phosphide high electron mobility transistors (InP-HEMT) and gain as high as 9.1 dB at 64 GHz and 10.5 dB at 44 GHz. And a 1 dB compression point of 7.5 dBm have been achieved View full abstract»

• ### CMOS-process-independent average power dissipation macromodelling

Publication Year: 1995, Page(s):1337 - 1338
| | PDF (168 KB)

An accurate CMOS-process-independent average power dissipation macromodel is presented for the inverter and multiple input macros, including NAND, NOR, the transmission gate, pass gate and SRAM cell. A new macro activity time period is defined and accurate macro activity estimations are achieved without the need for analogue propagation delay simulation View full abstract»

• ### Discrete-time model for multimedia correlated sources

Publication Year: 1995, Page(s):1316 - 1317
Cited by:  Papers (4)
| | PDF (164 KB)

A multimedia source model is presented. To capture the intermedia synchronisation requirements of the streams in the multimedia flow, the model is defined as the superposition of heterogeneous correlated monomedia arrival processes. Transition probability matrices and correlation functions are calculated to allow any designer to investigate network performance by means of well-known analytical tec... View full abstract»

• ### Spectrum efficiency for log-normal shadowed Rician/Rician channels

Publication Year: 1995, Page(s):1329 - 1331
Cited by:  Papers (1)
| | PDF (252 KB)

Analysis is carried out on the spectrum efficiency in a microcellular mobile radio environment using a fourth power path loss law. A new technique for evaluating outage probabilities for channels affected by Rician fast fading and log-normal shadowing is presented, and new spectrum efficiency against outages probability curves for these channels is obtained and discussed View full abstract»

• ### Diagonal horn integrated with micromachined waveguide for submillimetre applications

Publication Year: 1995, Page(s):1307 - 1309
Cited by:  Papers (1)  |  Patents (4)
| | PDF (252 KB)

The feasibility of coupling silicon micromachines rectangular waveguide to a modified diagonal horn antenna using a model at 110 GHz is demonstrated. The antenna patterns obtained are similar to those obtained with a standard diagonal horn. A method of reducing the on-axis cross polarization response of diagonal horns is also presented View full abstract»

• ### DS-CDMA capacity enhancement with adaptive antennas

Publication Year: 1995, Page(s):1319 - 1320
Cited by:  Papers (7)
| | PDF (180 KB)

A new ray-based simulation methodology for an adaptive antenna system is presented. Results for a typical microcellular environment highlight the behaviour of the adaptive antenna, and DS-CDMA capacity analysis illustrates the capacity enhancement attainable. For the cases considered, a minimum five fold increase in the overall spectrum efficiency is predicted for an eight-element adaptive antenna... View full abstract»

• ### Spectral-domain analysis of microstrip transmission line covered with lossy dielectric

Publication Year: 1995, Page(s):1354 - 1355
Cited by:  Papers (1)
| | PDF (152 KB)

Microstrip transmission lines show many properties which make them suitable as a medium for contact measurement of complex dielectric permittivity. Such a system could be based on determining the effective permittivity of a microstrip line covered by an unknown dielectric substance. To achieve this an analysis of a microstrip transmission line covered with a lossy dielectric is presented which is ... View full abstract»

• ### Compact active polarisation-agile antenna using square patch

Publication Year: 1995, Page(s):1305 - 1306
Cited by:  Papers (6)
| | PDF (152 KB)

A polarisation-agile active patch antenna with a compact layout has been developed. Comprising a square patch with an overlay, it has two transistors in the common base configuration, connected on adjacent sides to excite orthogonal modes of oscillation. Circular polarisation of either sense, and linear polarisation parallel to either patch side or diagonal, can be radiated View full abstract»

• ### Efficiency of optimal conditional importance sampling

Publication Year: 1995, Page(s):1322 - 1323
Cited by:  Papers (4)
| | PDF (172 KB)

Optimal conditional importance sampling (OCIS) provides the unique optimal conditional estimator for error probabilities. The OCIS method essentially obtains a Monte Carlo average over conditional error probabilities. The efficiency of OCIS is studied for a binary symmetric ISI channel with AWGN. The results show that the technique is at least twice as efficient as that of the linearly shifted met... View full abstract»

• ### Spectrodetector: novel monolithic wavelength reader and photodetector

Publication Year: 1995, Page(s):1373 - 1374
Cited by:  Patents (1)
| | PDF (164 KB)

A novel compact monolithic wavelength reader and photodetector is demonstrated for the first time. The device consists of two back-to-back detectors with a wavelength dependent distributed Bragg reflector in between, and has a spectral range of 40 nm and a resolution of 1 nm View full abstract»

• ### Multiquantum well electroabsorption modulators for 80 Gbit/s OTDM systems

Publication Year: 1995, Page(s):1370 - 1371
Cited by:  Papers (6)  |  Patents (2)
| | PDF (172 KB)

A fully packaged electroabsorption modulator is used to generate transform limited 4.1 ps pulses at a 20 GHz repetition rate. The feasibility of using this component for short pulse generation and demultiplexing in a four channel 80 Gbit/s OTDM system is discussed View full abstract»

• ### Calculation of ADC resolution for DMT modulation

Publication Year: 1995, Page(s):1315 - 1316
Cited by:  Papers (2)
| | PDF (164 KB)

The analytical derivation of the required precision for the analogue-to-digital converter in discrete multitone transceivers is presented. The obtained closed-form expression, that includes all relevant system parameters, directly relates the required ADC resolution with the maximum allowed number of bits allocated to the DMT subchannels View full abstract»

• ### Expansion of non-dispersion-shifted fibre transmission distance by turn-off timing delayed NRZ modulation

Publication Year: 1995, Page(s):1367 - 1368
| | PDF (168 KB)

A simple method for expanding transmission distance in high speed, non-return-to-zero (NRZ): non-dispersion-shifted fibre transmission systems is proposed. The turn-off timing delay of the optical modulator output increases the distance over which pulse compression is optimised View full abstract»

• ### Vertical MOS technology with sub-0.1 μm channel lengths

Publication Year: 1995, Page(s):1394 - 1396
Cited by:  Papers (11)
| | PDF (224 KB)

A vertical MOSFET with a channel length of 85 nm has been fabricated by molecular beam epitaxy. Compared to previous work, the electrical behaviour has been greatly improved, allowing the use of standard simulation tools for analysing the I-V characteristics. From experimental and theoretical results. We conclude that for vertical MOSFETs. The useful minimum channel length is not limited by the te... 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