Online ISSN
1350-911X
Print ISSN
0013-5194
Electronics Letters
Volume 42, Issue 19, 14 September 2006
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Volume 42, Issue 19
14 September 2006
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- Author(s): F. Gozzini ; G. Ferrari ; M. Sampietro
- Source: Electronics Letters, Volume 42, Issue 19, p. 1069 –1070
- DOI: 10.1049/el:20061709
- Type: Article
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A new approach to obtain very-small transconductance systems, i.e. large value equivalent resistors, on standard CMOS technology is proposed. The transconductor is characterised by a compact topology, high current dynamic range and linearity up to rail-to-rail input swing and symmetric operation for positive and negative currents. Experimental results show transconductance values as small as 3 pA/V (equivalent to 330 GΩ) with fA working capability, ideal in various applications such as high sensitivity integrators or lowpass filters with sub-Hz cutoff frequencies.
Linear transconductor with rail-to-rail input swing for very large time constant applications
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- Author(s): K. Kim and W.R. Scott
- Source: Electronics Letters, Volume 42, Issue 19, p. 1070 –1071
- DOI: 10.1049/el:20062186
- Type: Article
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A simple procedure to calibrate numerical data in a manner which allows for accurate comparison to experimental data is presented. A simple dipole is used to demonstrate the procedure. The numerical calibration procedure is essentially the same as the experimental calibration procedure which makes it possible to make good comparisons. The antenna, along with three calibration standards, are numerically modelled and experimentally measured. Standard S-parameter calibration procedures are used for both. The calibrated numerical data and the measured data are compared in terms of reflected voltage in the feed line. Agreement is shown to be improved significantly with the calibration technique. - Author(s): J. Janapsatya ; K.P. Esselle ; T.S. Bird
- Source: Electronics Letters, Volume 42, Issue 19, p. 1071 –1073
- DOI: 10.1049/el:20061600
- Type: Article
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A method to reduce the size of the dielectric-resonator-on-patch (DRoP) antenna, using a shorting metal wall, is presented. An experimental antenna demonstrates several advantages including better bandwidth, less weight, less volume and a lower profile when compared to the original DRoP antenna without shorting walls. The predicted return loss and radiation patterns of the antenna are compared with measured data. - Author(s): C.-Y. Huang and D.-Y. Lin
- Source: Electronics Letters, Volume 42, Issue 19, p. 1073 –1074
- DOI: 10.1049/el:20061819
- Type: Article
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A modified coplanar waveguide (CPW)-fed bow-tie slot antenna is proposed to have a wider impedance bandwidth than that of the conventional CPW-fed bow-tie slot antenna. The antenna structure remains simple and has better impedance matching for ultra-wideband communications obtained through the adjustment of bow-tie flare angle and stem width. The in-band antenna gains varied from 3.5 to 7.1 dBi and broadside bidirectional radiation patterns are measured and presented. - Author(s): Y.B. Chen ; X.F. Liu ; Y.C. Jiao ; F.S. Zhang
- Source: Electronics Letters, Volume 42, Issue 19, p. 1074 –1076
- DOI: 10.1049/el:20062048
- Type: Article
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A novel CPW-fed broadband circularly polarised square slot antenna is proposed and fabricated. The proposed antenna is fed by a CPW with a widened L-type strip along the diagonal line of the square slot. Measured results show that the 3 dB axial-ratio bandwidth of the proposed antenna can reach 17%. The proposed antenna has simple coplanar geometry which can be easily fabricated on inexpensive substrate. - Author(s): H. Rmili ; J.M. Floc'h ; A. Khaleghi
- Source: Electronics Letters, Volume 42, Issue 19, p. 1076 –1077
- DOI: 10.1049/el:20061948
- Type: Article
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A wideband double-sided printed dipole antenna is presented for C- and X-bands. The proposed structure consists of a microstrip-fed annular-ring dipole with a central disc dipole printed on the top side of a substrate, and a modified annular-ring dipole, a connecting strip line and the ground plane printed on the bottom side. The antenna gives a wide resonant bandwidth that extends from 5 to 12.8 GHz, with a fractional bandwidth of 87.6%. Experimental and simulation results are presented and discussed in detail. - Author(s): L. Roy ; N. Berthereau ; N. Hojjat ; K. Kautio ; H. Panesaar
- Source: Electronics Letters, Volume 42, Issue 19, p. 1078 –1079
- DOI: 10.1049/el:20061501
- Type: Article
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A novel waveguide-fed rectangular dielectric resonator antenna in low temperature co-fired ceramic (LTCC) technology has been designed and fabricated at 24 GHz. To connect the antenna to the rest of the circuit a staircase microstrip to waveguide transition is introduced. Simulated and experimental results for input reflection coefficient are in excellent agreement. - Author(s): M. Comisso and R. Vescovo
- Source: Electronics Letters, Volume 42, Issue 19, p. 1079 –1081
- DOI: 10.1049/el:20062270
- Type: Article
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A technique to modify the radiation pattern of an antenna array in order to reject interference in a certain angular region is proposed. This technique exploits the knowledge of the spatial channel model, derived from recent measurements, to properly choose the position of a certain number of nulls. The method of projections is used to modify the excitation phases in order to synthesise the array pattern. - Author(s): K.P. Ray and Y. Ranga
- Source: Electronics Letters, Volume 42, Issue 19, p. 1081 –1082
- DOI: 10.1049/el:20061913
- Type: Article
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A new printed monopole configuration, the vertex chopped printed triangular monopole antenna, is proposed. It gives an ultra-wide impedance bandwidth ratio of 12.6:1 for a voltage standing wave ratio of 2 and over 25:1 for a voltage standing wave ratio equal to 2.6. Experiments were performed to measure the bandwidth and the radiation patterns of this antenna, which tally well with simulated results.
Calibration to facilitate comparison of numerical and experimental data for antenna
Compact wideband dielectric-resonator-on-patch antenna
CPW-fed bow-tie slot antenna for ultra-wideband communications
CPW-fed broadband circularly polarised square slot antenna
Design of wideband double-sided printed dipole antenna for C- and X-band applications
Dielectric resonator antenna with microstrip-waveguide transition in LTCC
Exploitation of spatial channel model for antenna array synthesis
Ultra-wideband printed modified triangular monopole antenna
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- Author(s): R. Rodríguez-Montañés ; D. Arumí ; J. Figueras
- Source: Electronics Letters, Volume 42, Issue 19, p. 1083 –1084
- DOI: 10.1049/el:20061621
- Type: Article
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Low supply voltage testing has traditionally been reported as an advantageous technique in detecting resistive bridging defects in combinational CMOS circuits. However, under certain topological conditions, the opposite effect is observed. These conditions are analysed. Applicability to diagnosis of bridging defects is discussed.
Effectiveness of very low voltage testing of bridging defects
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- Author(s): J. Shibayama ; R. Takahashi ; J. Yamauchi ; H. Nakano
- Source: Electronics Letters, Volume 42, Issue 19, p. 1084 –1086
- DOI: 10.1049/el:20062383
- Type: Article
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The recursive convolution (RC), piecewise linear recursive convolution (PLRC), and auxiliary differential equation (ADE) techniques are newly introduced into the implicit locally one-dimensional finite-difference time-domain method (LOD-FDTD) for the efficient analysis of dispersive media. The performance of each method is investigated through analysis of an optical waveguide with a metal cladding expressed in a Drude model. It is shown that the results of the PLRC- and ADE-LOD-FDTDs with Δt=10ΔtCFL, in which ΔtCFL is determined by the Courant-Friedrich-Levy condition, agree well with the result of the explicit FDTD, with the computational time being reduced to less than 30% of that of the explicit FDTD.
Frequency-dependent LOD-FDTD implementations for dispersive media
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- Author(s): C.-H. Yeh ; M.-C. Lin ; S. Chi
- Source: Electronics Letters, Volume 42, Issue 19, p. 1086 –1088
- DOI: 10.1049/el:20062334
- Type: Article
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A gain-flattened two-stage erbium-based fibre amplifier module, structured by an erbium-doped waveguide amplifier and an erbium-doped fibre amplifier in serial, is proposed and demonstrated experimentally. In an operating range of 1528 to 1562 nm, all the gain is above 35 dB and the noise figure is distributed from 5.5 to 6.7 dB, and ±1.1 dB maximum gain variation is retrieved at an input saturation power of −25 dBm. As a result, the proposed amplifier not only enhances gain value but possesses flatness in the operating region.
Gain flattened erbium-doped amplifier with 34 nm flat bandwidth
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- Author(s): Y. Lu ; Z. Wang ; W. Wang ; H. Cui
- Source: Electronics Letters, Volume 42, Issue 19, p. 1088 –1089
- DOI: 10.1049/el:20061729
- Type: Article
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A new error estimation method based on motion extrapolation is proposed to estimate distortion propagation. The region of interest area information is combined into the end to end distortion model to improve the perceptual performance. Simulations show that this method can provide much better subjective feeling than other methods. - Author(s): X.D. Jiang ; B. Mandal ; A. Kot
- Source: Electronics Letters, Volume 42, Issue 19, p. 1089 –1090
- DOI: 10.1049/el:20062035
- Type: Article
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A method to enhance maximum likelihood face recognition is presented. It selects a more robust weighting parameter and discards unreliable dimensions to circumvent problems of the unreliable small and zero eigenvalues. This alleviates the over-fitting problem in face recognition, where the high dimensionality and limited number of training samples are critical issues. The proposed method gives superior experimental results.
Adaptive intra refresh for ROI video coding based on motion extrapolated error estimation
Enhanced maximum likelihood face recognition
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- Author(s): P. Haldi ; G. Liu ; A.M. Niknejad
- Source: Electronics Letters, Volume 42, Issue 19, p. 1091 –1092
- DOI: 10.1049/el:20061585
- Type: Article
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A new approach for power combining several low-voltage CMOS amplifiers using a new on-chip transformer architecture is presented. The transformer utilises lateral coupling and thus the layout only requires one relatively thick metal layer. Full-wave electromagnetic simulation confirms the operation and low insertion loss of the transformer. - Author(s): S. Seok and K. Chun
- Source: Electronics Letters, Volume 42, Issue 19, p. 1092 –1094
- DOI: 10.1049/el:20061774
- Type: Article
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A micro-G detectable in-plane vibrating accelerometer is implemented by using a single crystalline silicon and glass-silicon anodic-bonded vacuum packaging technique. The sensing principle of the accelerometer is a gap-sensitive electrostatic stiffness changing effect. A mixed surface-bulk micromachining technology has been developed to use 40 µm-thick silicon as a structure material. The fabricated accelerometer shows a resolution of 5.2 µG and 128 Hz/G at the nominal frequency of 23.4 kHz.
CMOS compatible transformer power combiner
Inertial-grade in-plane resonant silicon accelerometer
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- Author(s): K. Finsterbusch ; N. Baker ; V.G. Ta'eed ; B.J. Eggleton ; D. Choi ; S. Madden ; B. Luther-Davis
- Source: Electronics Letters, Volume 42, Issue 19, p. 1094 –1095
- DOI: 10.1049/el:20062257
- Type: Article
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Long-period gratings in highly nonlinear chalcogenide glass (As2S3) rib waveguides are fabricated. A strong resonance of ∼17 dB depths and 3 dB width of ∼15 nm is obtained at a wavelength of 1525 nm by coupling the fundamental mode to the HE02 mode in good agreement with theory. The 20 mm grating is produced by a simple shadow mask technique and has a pitch of Λ=80 µm. - Author(s): X. Zhang ; X. Zhang ; W. Hong ; D. Huang
- Source: Electronics Letters, Volume 42, Issue 19, p. 1095 –1097
- DOI: 10.1049/el:20061545
- Type: Article
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A simple method for spectral response simulation of micro-ring resonators by combining the transfer matrix method with the FDTD method is presented. After calculating the inner circulation factor and coupling efficiencies using the FDTD method, spectral responses of micro-ring resonators are obtained using the transfer matrix method. It is shown that simulation results are in agreement with results in the literature.
Long-period gratings in chalcogenide (As2S3) rib waveguides
Simple method for spectral response simulation of micro-ring resonators by combining transfer matrix method with FDTD method
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- Author(s): M. Kim ; D.C. Larrabee ; J.A. Nolde ; C.S. Kim ; C.L. Canedy ; W.W. Bewley ; I. Vurgaftman ; J.R. Meyer
- Source: Electronics Letters, Volume 42, Issue 19, p. 1097 –1098
- DOI: 10.1049/el:20062507
- Type: Article
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A five-stage interband cascade laser with ridge width 22 µm and Au electro-plating for improved epitaxial-side-up heatsinking emits >260 mW per facet for CW operation at 80 K (λ=3.4 µm) and 100 mW at 200 K (λ=3.6 µm). The maximum CW operating temperature is 250 K, and the beam quality for a sister device without Au electro-plating is 1.5–3.8 times the diffraction limit.
Narrow-ridge interband cascade laser emitting high CW power
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- Author(s): T.-H. Wu ; C. Meng ; T.-H. Wu
- Source: Electronics Letters, Volume 42, Issue 19, p. 1098 –1100
- DOI: 10.1049/el:20061467
- Type: Article
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A 5.7 GHz GaInP/GaAs heterojunction bipolar transistor (HBT) sub-harmonic Gilbert downconversion mixer with octet-phase LO generator is demonstrated. The conversion gain is 15 dB, IP1dB is −13 dBm, IIP3 is 0 dBm, and IIP2 is 24 dBm when the LO power equals 3 dBm. The measured IF quadrature output waveforms indicate that the phase difference between the in-phase and quadrature-phase output channels is only 1.3°. - Author(s): K. Song ; Y. Fan ; Y. Zhang
- Source: Electronics Letters, Volume 42, Issue 19, p. 1100 –1101
- DOI: 10.1049/el:20062012
- Type: Article
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A novel radial cavity power divider based on the substrate integrated waveguide (SIW) technology is proposed. The design approach has been developed. A four-way Ku-band SIW power divider has been designed, fabricated and measured. Good agreement between simulation and experiment was noted. - Author(s): R.N. Gajaweera and L.F. Lind
- Source: Electronics Letters, Volume 42, Issue 19, p. 1101 –1102
- DOI: 10.1049/el:20062329
- Type: Article
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The general even-mode coupling matrix, which contains all possible couplings of a microwave filter can be synthesised with well established filter synthesis technique. Presented is a simple but efficient method to annihilate unwanted couplings to realise canonical topology microwave filters using Householder's transformations. Furthermore, this method can be easily adopted into filter design software to synthesise canonical topology microwave filters.
5.7 GHz GaInP/GaAs HBT sub-harmonic Gilbert downconverter with octet-phase LO generator
Radial cavity power divider based on substrate integrated waveguide technology
Synthesis of canonical topology microwave filters using Householder's transformations
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- Author(s): M.L. Roberts ; M.A. Temple ; R.F. Mills ; R.A. Raines
- Source: Electronics Letters, Volume 42, Issue 19, p. 1103 –1104
- DOI: 10.1049/el:20061708
- Type: Article
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The interference suppression capability of spectrally modulated, spectrally encoded (SMSE) signals is characterised for multiple channels containing partial band interference. The recently-introduced SMSE analytic framework is well-suited for software defined radio applications where coexistence and interference suppression (avoidance) is essential. Performance improvement is demonstrated using adaptive interference suppression within the SMSE framework over a wide range of interference-to-signal power ratios.
Interference suppression characterisation for spectrally modulated, spectrally encoded signals
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- Author(s): O. Muller ; A. Baghdadi ; M. Jézéquel
- Source: Electronics Letters, Volume 42, Issue 19, p. 1104 –1106
- DOI: 10.1049/el:20062209
- Type: Article
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Besides computations and decoding delay, iterations in turbo decoding imply intensive and random extrinsic information exchange between component decoders. This high data exchange rate needs huge communication and routing resources to support the required bandwidth. Proposed is a novel symbol-based criterion to reduce the extrinsic information bandwidth in turbo decoding. The proposed criterion measures each symbol's contribution to the convergence of the iterative process and inhibits unnecessary extrinsic information exchange according to an appropriate threshold. Simulation results demonstrate a 20–25% mean extrinsic information exchange rate reduction with negligible error-rate degradation. This significant bandwidth reduction can directly alleviate communication and routing architecture. - Author(s): L. Cao
- Source: Electronics Letters, Volume 42, Issue 19, p. 1106 –1107
- DOI: 10.1049/el:20061734
- Type: Article
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A simple yet effective bit-based early stopping technique by monitoring the evolution of log-likelihood ratio is proposed for turbo decoding. This method is insensitive to channel signal-to-noise ratio and coding settings, and hence eliminates the need of finding various threshold values in most existing early stopping techniques. - Author(s): Y.-K. Choi ; J.W. Bang ; D.W. Roh ; D.K. Kim
- Source: Electronics Letters, Volume 42, Issue 19, p. 1108 –1109
- DOI: 10.1049/el:20061885
- Type: Article
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Proposed is a joint design of space-time (ST) mapping and half-sized linear constellation precoding (LCP) to provide lower peak-to-average power ratio (PAPR) along with lower decoding complexity while maintaining full-diversity full-rate (FDFR), maximum coding gain, and product distance distribution at the level of conventional STBC with full-sized LCP. The proposed quasi-orthogonal ST mapping with half-sized LCP (Q-HLCP) is shown to have a PAPR advantage so that the Q-HLCP for a nonlinear amplifier with a 3 dB input back-off shows, at most, a 0.5 dB loss compared to the cases involving an ideal amplifier, while the conventional FDFR STBCs employing LCP suffer error floors. - Author(s): J.M. Garrido-Balsells ; A. Garcıa-Zambrana ; A. Puerta-Notario
- Source: Electronics Letters, Volume 42, Issue 19, p. 1109 –1110
- DOI: 10.1049/el:20062193
- Type: Article
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Spectral information evaluation of the recently proposed multiple-pulse-position modulation (MPPM) scheme with variable Hamming weight is presented, its spectral properties being considered for the first time. In this sense, an original analytic expression for the power spectral density is obtained, including the continuous and discrete components of the spectrum, particularised for different code rates using Gaussian pulses with reduced duty cycle. Obtained results provide important considerations in the design of practical rate-adaptive optical wireless communications.
Bandwidth reduction of extrinsic information exchange in turbo decoding
Bit-based SNR insensitive early stopping for turbo decoding
Joint design of space-time mapping and half-sized linear constellation precoding for FDFR STBC with low PAPR and decoding complexity
Spectral characterisation of variable weight MPPM modulation technique
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- Author(s): T. Schneider ; M. Junker ; K.U. Lauterbach ; R. Henker
- Source: Electronics Letters, Volume 42, Issue 19, p. 1110 –1112
- DOI: 10.1049/el:20062235
- Type: Article
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A technique for the distortion reduction of delayed pulses in single and cascaded slow light delay lines is demonstrated. The method is based on the overlap of different independent Brillouin gains. With three Brillouin lines a distortion reduction of around 30% in a two-segment delay line was achieved. - Author(s): Z.G. Lu ; J.R. Liu ; S. Raymond ; P.J. Poole ; P.J. Barrios ; D. Poitras ; F.G. Sun ; G. Pakulski ; P.J. Bock ; T. Hall
- Source: Electronics Letters, Volume 42, Issue 19, p. 1112 –1114
- DOI: 10.1049/el:20062152
- Type: Article
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A highly efficient non-degenerate four-wave mixing (FWM) process using CW pump and probe signals around the L-band wavelength range in an InAs/InGaAsP quantum dot semiconductor optical amplifier (QD-SOA) is experimentally demonstrated for the first time. The preliminary experimental results indicate that the FWM efficiency using QD-SOA is independent of the sign of the frequency detuning and decreases by less than 20 dB/decade with frequency detuning increasing.
Distortion reduction in cascaded slow light delays
Highly efficient non-degenerate four-wave mixing process in InAs/InGaAsP quantum dots
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- Author(s): C.-B. Huang ; Z. Jiang ; D.E. Leaird ; A.M. Weiner
- Source: Electronics Letters, Volume 42, Issue 19, p. 1114 –1115
- DOI: 10.1049/el:20062126
- Type: Article
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Generation of a high repetition rate femtosecond pulse train by line-by-line phase and amplitude shaping applied to over 40 lines from a phase-modulated CW laser is demonstrated. Resulting pulses with FWHM duration of 2.76 ps at 9 GHz repetition rate are reported. 324 fs pulses are obtained at 9 GHz after soliton compression. - Author(s): I. Glesk ; Y.-K. Huang ; C.-S. Brès ; P.R. Prucnal
- Source: Electronics Letters, Volume 42, Issue 19, p. 1115 –1117
- DOI: 10.1049/el:20062253
- Type: Article
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A scalable OCDMA platform for testing different avionics applications at Lockheed Martin has been designed and built. The platform enables communication at OC-24 per user with raw BER<10−12 using fast wavelength-hopping, time-spreading prime codes with picosecond optical pulses. A novel optical encoder/decoder pair enables a connectivity approaching a so-called ‘one-time pad’ security and eavesdropping studies.
High-rate femtosecond pulse generation via line-by-line processing of phase-modulated CW laser frequency comb
OCDMA platform for avionics applications
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- Author(s): N.P. Johnson ; A.Z. Khokhar ; H.M.H. Chong ; R.M. De La Rue ; S. McMeekin
- Source: Electronics Letters, Volume 42, Issue 19, p. 1117 –1119
- DOI: 10.1049/el:20062212
- Type: Article
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The infrared reflectance spectra at normal incidence for split-ring resonator arrays fabricated in thin films of three different metals on a silicon substrate are reported. The results are compared with a finite difference time domain simulation of the structures and a simple and novel equivalent-circuit method for the calculation of the first and second resonant wavelengths. - Author(s): B. Xia ; L.R. Chen ; P. Dumais ; C.L. Callender
- Source: Electronics Letters, Volume 42, Issue 19, p. 1119 –1120
- DOI: 10.1049/el:20062290
- Type: Article
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All-optical generation of 40 GHz pulse trains with arbitrary binary code patterns from a 10 GHz uniform input pulse train using lattice-form Mach-Zehnder interferometers is experimentally demonstrated. The device is fabricated on a silica-based planar lightwave circuit, which is based on a buried channel waveguide structure with an index difference of 1.2%.
Characterisation at infrared wavelengths of metamaterials formed by thin-film metallic split-ring resonator arrays on silicon
Ultrafast pulse train generation with binary code patterns using planar lightwave circuits
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- Author(s): H. Jiang and T. Egawa
- Source: Electronics Letters, Volume 42, Issue 19, p. 1120 –1122
- DOI: 10.1049/el:20061405
- Type: Article
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Solar-blind AlGaN Schottky photodiodes with a large active area of 2×2 mm have been fabricated on a AlN/sapphire template. The resulting devices show dark current density as low as 6.6×10−11 A at −5 V bias. A zero-bias peak responsivity of 38 mA/W was obtained at 260 nm, corresponding to an estimated detectivity of 1.2×1014 cm Hz1/2 W−1. - Author(s): J. Kettle ; R.M. Perks ; P. Dunstan
- Source: Electronics Letters, Volume 42, Issue 19, p. 1122 –1123
- DOI: 10.1049/el:20061488
- Type: Article
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Localised optical emission spectra have been obtained from AlGaInP light emitting devices measured across the surface of the LED from the p-contact to the perimeter under DC operation. Shifts in the peak wavelength of the spectral emission were observed that correspond to a non-uniform temperature distribution, providing direct evidence that heat generation occurs locally in the active region around the central p-contact. This effect becomes more apparent with less conductive current spreading layers as a result of current crowding around the p-contact. Devices with current spreading layers of lower sheet resistance were also found to operate with better thermal management since their injection current density is more uniformly spread in the active region.
Demonstration of large active area AlGaN solar-blind Schottky photodiodes with low dark current
Localised joule heating in AlGaInP light emitting diodes
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- Author(s): E. Alsusa and L. Yang
- Source: Electronics Letters, Volume 42, Issue 19, p. 1123 –1125
- DOI: 10.1049/el:20061810
- Type: Article
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A new low complexity post-IFFT peak-to-average power ratio (PAPR) reduction technique using dynamically selected time-domain amplitude randomising sequences to minimise the PAPR per OFDM block is presented. It is shown that PAPR reductions within less than 0.5 dB of the ordinary selected mapping (SLM) can be achieved with the proposed technique, which has a complexity requirement that is orders of magnitude less than that of the SLM.
Low-complexity post-IFFT PAPR reduction technique for OFDM systems
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- Author(s): C. Kuan and K. Dimyati
- Source: Electronics Letters, Volume 42, Issue 19, p. 1125 –1127
- DOI: 10.1049/el:20061466
- Type: Article
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A model to accurately analyse collision probabilities of 802.11 under saturated traffic assumption is presented. Two key probabilities governing collisions are defined to reflect the different collision probabilities based on whether the channel was busy or idle. The resulting model significantly differs from other models that have appeared in the literature. Simulation results are used to validate the accuracy of the proposed model. - Author(s): Y. Zhang ; P. Xu ; Z. Zhang ; G. Bi
- Source: Electronics Letters, Volume 42, Issue 19, p. 1127 –1128
- DOI: 10.1049/el:20061521
- Type: Article
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Presented is a new analytical model for the throughput of the IEEE 802.15.4 slotted CSMA/CA which can be studied as slotted non-persistent CSMA. Key to the accuracy of the model is a careful study of the timeout period, which has not been considered by all previous 802.15.4 models. The analytic results are validated via the present authors' OPNET simulation model.
Analysis of collision probabilities for saturated IEEE 802.11 MAC protocol
Comments on throughput analysis of IEEE 802.15.4 slotted CSMA/CA considering timeout period
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