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# Electronics Letters

## Filter Results

Displaying Results 1 - 25 of 58
• ### Design of a performance enhanced traceback algorithm for the Viterbi decoder

Publication Year: 1996, Page(s):1254 - 1255
Cited by:  Patents (1)
| | PDF (236 KB)

The authors propose an efficient traceback scheme for the parallel hardware implementation of the Viterbi algorithm. Compared to the conventional Viterbi algorithm, where output is selected arbitrarily when multiple survivor paths exist, the proposed algorithm decides decoding output by analysing the survivor paths of consecutive tracebacks. Experimental results show that the proposed algorithm ex... View full abstract»

• ### Electro-optic measurement of the electric near-field distribution of 7 GHz planar resonator

Publication Year: 1996, Page(s):1305 - 1307
Cited by:  Papers (2)  |  Patents (1)
| | PDF (428 KB)

Mapping of the electric near-field distribution of a free-running planar 7 GHz resonator with a novel femtosecond laser based electro-optic measurement system is demonstrated. The measured near-field radiation pattern gives direct evidence for the presence of parasitic patch and microstrip modes predicted by electric field integral equation simulations View full abstract»

• ### Scalable approach to high performance ATM switching by the interconnection of free-space photonic crossbar modules

Publication Year: 1996, Page(s):1313 - 1314
| | PDF (220 KB)

The authors report a novel means of constructing large asynchronous transfer mode (ATM) switching fabrics using a modest number of output queued, free-space photonic crossbar modules interconnected within all optical fibre harness View full abstract»

• ### Data-aided phase tracking detection of Doppler shifted MPSK

Publication Year: 1996, Page(s):1252 - 1253
Cited by:  Papers (2)
| | PDF (212 KB)

A new data-aided phase tracking detection for Doppler shifted MPSK is presented, and simulation results are given. It is shown that the data-aided phase tracking detection of Doppler shifted MPSK provides good error performance View full abstract»

• ### Structural dependence of 1.3 μm narrow beam lasers fabricated by selective MOCVD

Publication Year: 1996, Page(s):1304 - 1305
Cited by:  Papers (10)
| | PDF (224 KB)

Lasing characteristics of 1.3 μm narrow beam lasers have been investigated in terms of the energy separation between gain and waveguide regions simultaneously formed by selective MOCVD. The HR-coated lasers with a large energy separation of 110 meV exhibit a low threshold current of 12 mA, a high power of >50 mW, and a high temperature of 120°C with narrow beam divergence of 11° (hor... View full abstract»

• ### Guided-wave 1.3/1.55 μm wavelength division multiplexer based on multimode interference

Publication Year: 1996, Page(s):1259 - 1261
Cited by:  Papers (12)
| | PDF (356 KB)

To improve the wavelength sensitivity of the multimode interference phenomenon and thus reduce the device length, a restricted-resonance multimode interference scheme and a lower beat length ratio were adopted to design a novel 1.3/1.55 μm wavelength division multiplexer. Using the modal propagation analysis, transmission characteristics of the device were investigated View full abstract»

• ### Scalable 32 channel chirped-pulse WDM source

Publication Year: 1996, Page(s):1311 - 1312
Cited by:  Papers (36)  |  Patents (5)
| | PDF (224 KB)

The authors present a novel multifrequency wavelength-division-multiplexed (WDM) source based on a femtosecond fibre laser. The femtosecond pulses are linearly chirped and stretched in time by propagation through a fibre, so that 32 or more WDM channels can be defined and modulated sequentially in time by a single modulator View full abstract»

• ### Introducing time-frequency distribution with a complex-time' argument

Publication Year: 1996, Page(s):1265 - 1267
Cited by:  Papers (12)
| | PDF (340 KB)

A distribution, highly concentrated along the instantaneous frequency, is introduced using a complex-time' signal argument. Realisation of a signal with complex argument, using a signal with a real argument, is presented View full abstract»

• ### High-swing cascode MOS current mirror

Publication Year: 1996, Page(s):1251 - 1252
Cited by:  Papers (13)  |  Patents (1)
| | PDF (208 KB)

A high-swing cascode triode-region MOS current mirror, basically comprising a triode-region translinear loop, is proposed. A translinear analysis and measurement results are presented View full abstract»

• ### Prevention of gain saturation by multi-layer quantum dot lasers

Publication Year: 1996, Page(s):1302 - 1304
Cited by:  Papers (20)
| | PDF (388 KB)

The authors compare the threshold current density jth against the laser length of a single layer quantum dot (SLQD) laser with a sixfold multilayer quantum dot (MLQD) laser. Gain saturation is not observed in the MLQD laser. They calculate jth against the number of dot layers including gain saturation. The strong impact of thermal coupling of carriers on jth is dem... View full abstract»

• ### Exact calculation of buffer contents variance and delay jitter in a discrete-time queue with correlated input traffic

Publication Year: 1996, Page(s):1258 - 1259
| | PDF (228 KB)

A discrete-time queueing system with infinite buffer size and a finite number of independent heterogeneous two state on/off sources is considered. Exact closed-form expressions are derived for the variances of the buffer contents and the delay. In passing, the correctness of a conjecture recently made by Pieloor and Lewis (1996) is proved View full abstract»

• ### Experimental verification of self-phase-modulation induced nonlinear distortion in externally modulated AM-VSB lightwave systems

Publication Year: 1996, Page(s):1310 - 1311
Cited by:  Papers (3)
| | PDF (216 KB)

The authors have experimentally observed self-phase-modulation induced CSO distortion in externally modulated AM-VSB trunk lightwave systems using 50 km of standard fibre. The onset of this distortion occurs at power levels below those needed to generate stimulated Brillouin scattering View full abstract»

• ### Improved sequence estimator for MPSK with carrier phase noise

Publication Year: 1996, Page(s):1264 - 1265
| | PDF (224 KB)

An improved version of the sequence estimator for MPSK previously developed is presented. It is shown to have better bit error probability performance in the presence of carrier phase noise. This improvement comes from incorporating more channel memory into the trellis on which the estimator operates View full abstract»

• ### Applicability of the PML absorbing boundary condition to dielectric anisotropic media

Publication Year: 1996, Page(s):1270 - 1271
Cited by:  Papers (8)
| | PDF (204 KB)

The authors study the applicability of Berenger's perfect matching layer (PML) absorbing boundary condition to match waves propagating on anisotropic media. Concrete conditions for some special cases are obtained, although no perfect matching can be achieved for the most general case View full abstract»

• ### All-CMOS temperature independent current reference

Publication Year: 1996, Page(s):1280 - 1281
Cited by:  Papers (34)  |  Patents (3)
| | PDF (208 KB)

An All-CMOS temperature independent current reference circuit was designed by eliminating the mobility dependence term through the combination of a current source which is proportional to mobility and one which is inversely proportional to mobility by using a CMOS square root circuit. The test chip fabricated using a 2 μm n-well CMOS process showed a 1.7% variation in the average for the temper... View full abstract»

• ### Double scroll in a simple `2D' chaotic oscillator

Publication Year: 1996, Page(s):1250 - 1251
Cited by:  Papers (5)
| | PDF (196 KB)

A very simple RC oscillator exhibiting the double-scroll chaotic attractor is described. The circuit contains two opamps, a Wien bridge, and two diodes used as nonlinear devices. The typical waveforms and the phase portraits of the attractor are presented to illustrate the double scroll in a quasi-two-dimensional oscillator View full abstract»

• ### Direct generation of a 750 fs, 10 GHz pulse train from a regeneratively mode-locked fibre laser with multiple harmonic modulation

Publication Year: 1996, Page(s):1291 - 1293
Cited by:  Papers (2)  |  Patents (6)
| | PDF (352 KB)

A 750 fs transform-limited pulse train at 10 GHz has been directly generated for the first time from a regeneratively mode-locked fibre laser which has two synchronised amplitude modulations at 10 and 20 GHz View full abstract»

• ### High coupling efficiency and high responsivity 1.3 μm light emission and detection diodes with a butt-jointed spot-size converter

Publication Year: 1996, Page(s):1318 - 1319
Cited by:  Papers (3)  |  Patents (1)
| | PDF (244 KB)

For bi-directional transmission in optical subscriber loops, the authors have fabricated light emission and detection (LEADs) diodes with spot-size converter region formed by butt-joint selective growth. With the spot-size converter region, this device has a low-loss coupling of 2.5 dB and high responsivity of 0.35 A/W. Using a bulk detection layer, uniform polarisation and wavelength dependence w... View full abstract»

• ### Parallel algorithm for image rendering and its implementation

Publication Year: 1996, Page(s):1275 - 1277
| | PDF (552 KB)

The authors present a parallel algorithm for fast rendering. A set of zones which can be concurrently processed is identified; this set is split into a number of subsets equal to the number of available processors. Each processor renders, in parallel with the others, a zone of its set View full abstract»

• ### Oxide-confined 850 nm vertical-cavity lasers for multimode-fibre data communications

Publication Year: 1996, Page(s):1300 - 1302
Cited by:  Papers (13)  |  Patents (3)
| | PDF (396 KB)

Continuous-wave performance characteristics for 850 nm vertical-cavity lasers exploiting M-oxide confinement are investigated for application to multimode fibre data links. Threshold currents as low as 193 μA are measured for devices with 5 μm apertures. Wallplug efficiencies exceeding 30%, are measured for the first time in 850 nm VCSELs, at output powers of a few milliwatts most relevant f... View full abstract»

• ### Estimation of the Gilbert model parameters using the simulated annealing method

Publication Year: 1996, Page(s):1256 - 1258
Cited by:  Papers (3)
| | PDF (336 KB)

An estimation method based on the simulated annealing algorithm is proposed for computing the Gilbert model parameters from sample error sequences. Experimental results indicate that the simulated annealing method yields estimates which more closely match the experimental error statistics View full abstract»

• ### Experimental study of fibre induced distortions in externally modulated 1550 nm analogue CATV links

Publication Year: 1996, Page(s):1309 - 1310
Cited by:  Papers (4)
| | PDF (240 KB)

Fibre induced distortions are demonstrated to limit the performance of externally modulated analogue CATV links at distances ⩾90 km. Degradations in both the composite second order and composite triple beat are observed. At optical modulation indices ⩾5.4%, the residual chirp of the modulator could also introduce a significant amount of distortion View full abstract»

• ### Identifying generators for number theoretic transforms

Publication Year: 1996, Page(s):1262 - 1264
| | PDF (352 KB)

The author presents results that can be used to obtain all the possible generators for a given number theoretic transform (NTT). A generalisation of the well known Euler theorem is derived which can be used to determine all the generators of a given NTT once the generators over the underlying finite field are identified View full abstract»

• ### Use of comb filters for efficient VLSI implementation of reduced clock frequency noise shapers

Publication Year: 1996, Page(s):1268 - 1270
Cited by:  Papers (4)  |  Patents (2)
| | PDF (316 KB)

The use of comb filters as an elegant means of reduced clock frequency noise-shaping without excessive hardware overhead is presented. The significance of the method is illustrated using second order noise-shaping characteristics. A 256 times oversampled and noise-shaped bit-stream sequence is obtained by running a second order noise shaper at a clock frequency four times lower than that of the bi... View full abstract»

• ### Microstrip adaptive array antenna

Publication Year: 1996, Page(s):1246 - 1247
| | PDF (192 KB)

A planar adaptive array of three microstrip patch antennas consisting of a central active microstrip antenna and two symmetrical lateral passive antennas is used to steer the beam. An electronic beam scanning of ±20° can be achieved with the control of reactive loads located into the lateral patches 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