Online ISSN
1350-911X
Print ISSN
0013-5194
Electronics Letters
Volume 44, Issue 20, 25 September 2008
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Volume 44, Issue 20
25 September 2008
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- Author(s): W. Vereecken and M. Steyaert
- Source: Electronics Letters, Volume 44, Issue 20, p. 1167 –1168
- DOI: 10.1049/el:20080891
- Type: Article
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A CMOS baseband amplifier using an open-loop architecture is presented. The eight-stage amplifier, implemented in a standard 0.13 µm CMOS technology, shows a maximum gain of 30 dB in the broadband frequency range 20–850 MHz. Each amplification stage draws 0.8 mA from a single 1.2 V power supply. The total amplifier chain shows an output referred OIP3 of 11 dBm, which can be achieved by using active loads that compensate for the nonlinear transconductance of the input transistors.
20–850 MHz low-distortion baseband amplifier in digital CMOS process
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- Author(s): O. Ramadan
- Source: Electronics Letters, Volume 44, Issue 20, p. 1168 –1170
- DOI: 10.1049/el:20081614
- Type: Article
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An unconditionally stable multi-stage alternating direction implicit perfectly matched layer (ADI-PML) algorithm is presented for modelling dispersive open region finite difference time domain (FDTD) applications. In the proposed algorithm, the updating procedure of the field equations from the nth to (n+1)th time step is carried out in four stages with a time increment of Δt/4. Numerical examples carried out in two dimensions show that the proposed algorithm presents significant improvement over the conventional ADI-PML algorithm for different Courant-Friedrichs-Lewy numbers and for different cell sizes per wavelength. - Author(s): R. Gayathri ; T.U. Jisney ; D.D. Krishna ; M. Gopikrishna ; C.K. Aanandan
- Source: Electronics Letters, Volume 44, Issue 20, p. 1170 –1171
- DOI: 10.1049/el:20081770
- Type: Article
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A microstrip-fed planar ultra-wideband monopole antenna with band-notch characteristics is proposed. The antenna size is compact (18×30 mm) and operates over an extremely wide band of 3–16 GHz. The proposed design consists of an inverted cone as the radiating patch and a tapered ground plane. Wideband matching is obtained by properly shaping the ground. A pair of symmetrically placed quarter wave slot resonators is embedded in the ground plane for rejecting the 5–6 GHz WLAN band. Results indicate a stable and omnidirectional radiation pattern with an average gain of 3 dBi and a sharp reduction in gain at notched frequencies. Moreover, measured group delay and transmission characteristics show excellent transient response. - Author(s): H.P. Zhao ; J. Hu ; Z.P. Nie
- Source: Electronics Letters, Volume 44, Issue 20, p. 1171 –1173
- DOI: 10.1049/el:20081711
- Type: Article
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The block storing method (BSM) based on Morton Key ordering for the efficient storage of the near group interaction matrix in the multilevel fast multipole algorithm (MLFMA) is presented. The proposed method is applied in a parallel MLFMA and a scattering problem with nearly 5 300 000 unknowns is solved, for which the BSM saves 6.84 GB without any extra cost. - Author(s): L. Mo ; H. Zhang ; H. Zhou
- Source: Electronics Letters, Volume 44, Issue 20, p. 1173 –1174
- DOI: 10.1049/el:20089813
- Type: Article
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A broadband ultra-high frequency radio frequency identification (UHF RFID) tag patch antenna with a pair of U slots is presented. By embedding a pair of U slots on the patch, a new resonant mode adjacent to the origin mode is excited and a broadband characteristic is achieved. The measured half-power bandwidth of the proposed antenna is 133 MHz and it covers all UHF RFID frequency bands. Measurement results show that the proposed antenna can work on metallic objects of different sizes in both North America and Europe bands. - Author(s): M. Gopikrishna ; D.D. Krishna ; C.K. Aanandan ; P. Mohanan ; K. Vasudevan
- Source: Electronics Letters, Volume 44, Issue 20, p. 1174 –1176
- DOI: 10.1049/el:20082269
- Type: Article
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A novel ultra-wideband (UWB) antenna consisting of a linear tapered slot in the ground plane and a microstrip to slotline transition is investigated. The antenna possesses a wide bandwidth from 2.95–14 GHz for |S11|<−10 dB and shows stable radiation patterns with an average gain of 3 dBi throughout the band. Measured group delay and transmission characteristics indicate that the antenna has good pulse handling capabilities. - Author(s): X.-L. Liang and T.A. Denidni
- Source: Electronics Letters, Volume 44, Issue 20, p. 1176 –1177
- DOI: 10.1049/el:20081900
- Type: Article
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A new dielectric resonator antenna (DRA) is introduced for wideband applications, where the wideband of this DRA design comes from three factors: a compact cross-T-shaped dielectric resonator, a conformal inverted-trapezoid patch as a feed mechanism, and a copper-clad substrate as a baseboard. Measured results demonstrate that the proposed DRA achieves an impedance bandwidth of about 71.8% for VSWR≤2, covering a frequency range from 3.56 to 7.57 GHz. This antenna also provides a stable broadside radiation pattern and a gain range of 3.2–7.3 dBi across the operating bandwidth. - Author(s): H.T. Hui and H.S. Lui
- Source: Electronics Letters, Volume 44, Issue 20, p. 1177 –1179
- DOI: 10.1049/el:20081708
- Type: Article
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The correlation coefficient of two vertically-polarised omnidirectional antennas in a typical rich multipath environment is expressed in terms of the conventional mutual impedances. This provides a convenient formula for the calculation of the correlation coefficient based on existing data available in the literature. Numerical results on two monopole antennas demonstrate the validity of this expression. - Author(s): L. Liu and R.J. Langley
- Source: Electronics Letters, Volume 44, Issue 20, p. 1179 –1181
- DOI: 10.1049/el:20081995
- Type: Article
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A microstrip patch antenna operating in the 5 GHz range and tuned by liquid crystal (LC) is described. The simulated tuning range is 8% while the measurements showed a range of 4%. Losses in the commercially available LC material at these frequencies give rise to antenna efficiencies ranging from 35–40% at best and falling to around 20% when the LC is in the unbiased state. - Author(s): J.-S. Kim ; W. Choi ; G.-Y. Choi
- Source: Electronics Letters, Volume 44, Issue 20, p. 1181 –1182
- DOI: 10.1049/el:20080952
- Type: Article
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An embedded patch-type RFID tag antenna (UHF band) using ceramic material for tagging metallic objects is presented. The proposed RFID tag is embedded in the metallic object; the diameter of the proposed tag is 34 mm and the height is 5 mm. It is shown that a suitable embedded tag antenna can be made from two PIFAs with horizontal slits in the metallic object. The embedded tag antenna satisfactorily operates in the metallic object and the proposed design is verified by simulation and measurements, which show good agreement.
Accuracy improved multi-stage ADI-PML algorithm for dispersive open region FDTD problems
Band-notched inverted-cone monopole antenna for compact UWB systems
Block storing method for efficient storage of near group impedance in MLFMA
Broadband UHF RFID tag antenna with a pair of U slots mountable on metallic objects
Compact linear tapered slot antenna for UWB applications
Cross-T-shaped dielectric resonator antenna for wideband applications
Expression of correlation coefficient for two omnidirectional antennas using conventional mutual impedances
Liquid crystal tunable microstrip patch antenna
UHF RFID tag antenna using two PIFAs embedded in metallic objects
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- Author(s): M.S. Manikandan and S. Dandapat
- Source: Electronics Letters, Volume 44, Issue 20, p. 1182 –1184
- DOI: 10.1049/el:20081319
- Type: Article
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An effective quality-controlled set partitioning in hierarchical trees (SPIHT)-based ECG coding strategy under noise environments is proposed using a wavelet-energy based weighted percentage root mean square difference (WEWPRDs) criterion. This criterion is subjectively meaningful and leads to a better measure of rate-distortion (R-D) performance. Experiments on several noisy records from the MIT-BIH arrhythmia (mita) database show that the proposed strategy outperforms PRD and wavelet-based weighted PRDws (WWPRDs) measurement-criteria-based strategies. - Author(s): K.S. Kim ; J.H. Seo ; Jin U. Kang ; C.G. Song
- Source: Electronics Letters, Volume 44, Issue 20, p. 1184 –1185
- DOI: 10.1049/el:20081758
- Type: Article
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An enhanced time-frequency analysis of vibroarthrographic (VAG) signals is devised using segmentation by the dynamic time warping and denoising algorithm by the singular value decomposition, and the normal and abnormal VAG signals are classified by a back-propagation neural network. A total of 1408 VAG segments (normal 1031, abnormal 377) were used for evaluating the performance of the devised method and, consequently, the average accuracy was 92.0 ±1.6% (ranging from 89.4 to 95.4). This method could be used as a complementary tool for the non-invasive diagnosis of joint disorders.
Effective quality-controlled SPIHT-based ECG coding strategy under noise environments
Enhanced time-frequency analysis of VAG signals by segmentation and denoising algorithm
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- Author(s): R. Henker ; A. Wiatrek ; K.-U. Lauterbach ; M.J. Ammann ; A.T. Schwarzbacher ; T. Schneider
- Source: Electronics Letters, Volume 44, Issue 20, p. 1185 –1187
- DOI: 10.1049/el:20082007
- Type: Article
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Presented are theoretical investigations and simulations of a reduction of the group velocity dispersion (GVD) in slow-light systems by an optimisation of the gain spectrum of the stimulated Brillouin scattering (SBS). A comparison between a natural Brillouin gain spectrum and a broadened Brillouin gain spectrum with and without two additional losses at its wings is demonstrated. The focus of the theoretical examination was set on the superposition of a gain and two losses with an equal magnitude. Therefore, a low GVD and a high group index change could be achieved and hence, a small pulse distortion and a high time delay can be expected. - Author(s): T. Hirose ; K. Saito ; K. Takada
- Source: Electronics Letters, Volume 44, Issue 20, p. 1187 –1189
- DOI: 10.1049/el:20081489
- Type: Article
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A method using Fourier-transform infrared, reflection, microscopy for measuring the refractive index modulation in a CO2 laser-written long-period fibre grating is suggested. A mid-infrared spectrum was observed to detect the peak position around 1120 cm−1, which was correlated to the refractive index at the visible to near-IR frequency region in silica glass. The observed reflection peak was clearly modulated to have the same periodicity as that of the recorded grating. This method presents attractive features such as the obviation of complicated data processing, rapid measurement and no need to use matching oil. - Author(s): L. Scolari ; C.B. Olausson ; J. Weirich ; D. Turchinovich ; T.T. Alkeskjold ; A. Bjarklev ; L. Eskildsen
- Source: Electronics Letters, Volume 44, Issue 20, p. 1189 –1190
- DOI: 10.1049/el:20082164
- Type: Article
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A tunable and polarisation-maintaining all-in-fibre filter based on a liquid crystal photonic bandgap fibre is demonstrated. Its polarisation extinction ratio reaches 14 dB at 1550 nm wavelength. Its spectral tunability range spans over 250 nm in the temperature range 30–70°C. The measured transmission spectrum is compared with that obtained through finite element simulations.
Group velocity dispersion reduction in fibre-based slow-light systems via stimulated Brillouin scattering
Mid-infrared spectroscopic detection of refractive index in CO2 laser-written long-period fibre grating
Tunable polarisation-maintaining filter based on liquid crystal photonic bandgap fibre
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- Author(s): J. Wei and H. Peng
- Source: Electronics Letters, Volume 44, Issue 20, p. 1190 –1192
- DOI: 10.1049/el:20080967
- Type: Article
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A semi-supervised linear dimensionality reduction method based on side information and neighbourhood preserving is proposed. In this problem, only must-link constraints (pairs of instances belong to the same class) and cannot-link constraints (pairs of instances belong to different classes) are given. The proposed neighbourhood preserving based semi-supervised dimensionality reduction algorithm can not only preserve the must-link and cannot-link constraints but can preserve the local structure of the input data in the low dimensional embedding subspace. Experimental results on several datasets demonstrate the effectiveness of the method.
Neighbourhood preserving based semi-supervised dimensionality reduction
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- Author(s): D.G. Kim ; G.Y. Oh ; W.K. Choi ; H.J. Kim ; S.H. Kim ; H.C. Ki ; S.T. Kim ; H.J. Ko ; T.U. Kim ; M.H. Yang ; H.J. Kim ; N. Dagli ; Y.W. Choi
- Source: Electronics Letters, Volume 44, Issue 20, p. 1192 –1193
- DOI: 10.1049/el:20082141
- Type: Article
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Novel triangular resonators containing active and passive sections have been fabricated and characterised with various multimode-interference (MMI) lengths. The optimum MMI length and width turn out to be 108 and 9 µm, respectively. A free spectral range of approximately 228 GHz is observed near 1558 nm along with an on–off ratio of 9 dB. The proposed triangular resonator has the advantage of removing the direct coupling between the two access waveguides of the MMI coupler.
Compact triangular resonator without direct coupling between two access waveguides
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- Author(s): M. Waldmann ; R. Caspary ; D. Wortmann ; J. Gottmann ; W. Kowalsky
- Source: Electronics Letters, Volume 44, Issue 20, p. 1193 –1195
- DOI: 10.1049/el:20081912
- Type: Article
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When calling for compact green laser sources, the green upconversion emission of IR pumped erbium-doped fluoride glass waveguides opens up a technologically and economically superior alternative to complex and costly frequency doubling techniques. Therefore, fluoride glass planar waveguides were fabricated with thicknesses down to 29 µm and a scattering loss of 0.1–0.2 dB/cm.
Erbium-doped fluoride glass waveguides
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- Author(s): A. Smith ; J.E. Hastie ; H.D. Foreman ; T. Leinonen ; M. Guina ; M.D. Dawson
- Source: Electronics Letters, Volume 44, Issue 20, p. 1195 –1196
- DOI: 10.1049/el:20081435
- Type: Article
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A red-wavelength semiconductor disk laser (SDL) optically pumped by gallium nitride laser diodes is reported. This is believed to be the first demonstration of a directly diode-pumped visible wavelength SDL. In this initial demonstration, pump-power-limited continuous-wave output power up to 12.2 mW was achieved around room temperature in a single transverse mode with 2% output coupling. Insertion of an intracavity birefringent filter allowed tuning of the output over 11 nm around a centre wavelength of 672 nm.
GaN diode-pumping of red semiconductor disk laser
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- Author(s): Z.-C. Hao and J.-S. Hong
- Source: Electronics Letters, Volume 44, Issue 20, p. 1197 –1198
- DOI: 10.1049/el:20089877
- Type: Article
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A novel ultra-wideband (UWB) bandpass filter (BPF) using a broadside-coupled hairpin structure and multilayer organic liquid crystal polymer (LCP) technology is presented. To suppress stopband harmonic response, folded stepped impedance structures were adopted as hairpin resonators in the design. The proposed filter has been investigated numerically and experimentally. Multilayer LCP technology was used to implement designed UWB BPF. Good agreement between simulated and measured results of the proposed filter was observed. They show that the fabricated UWB BPF has a good performance, including a small insertion loss, a flat group delay with a variation within 0.1 ns in most of its passband, a wide stopband from 11.0–20.0 GHz with a high rejection level up to 20.0 dB, and a very compact size of 9.8×7.5 mm (0.36 λg×0.27λg, where λg is the guided wavelength of 50 Ω microstrip line at 6.85 GHz). - Author(s): M.H. Yang and J. Xu
- Source: Electronics Letters, Volume 44, Issue 20, p. 1198 –1200
- DOI: 10.1049/el:20081875
- Type: Article
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A compact elliptic function lowpass filter using a stepped impedance hairpin resonator is proposed. The filter has the advantages of compact size, low insertion loss, easy fabrication, a wide stopband, and sharp cutoff frequency response. In order to cause a sharp cutoff frequency response and the wide stopband suppression, a coupled stepped impedance resonator is taken into consideration for the newly proposed lowpass filter. A demonstration filter has been designed, fabricated and tested, and the results agree well with the theory. The size of the filter is less than 0.037λg×0.093λg, where λg is the waveguide length at the cutoff frequency 1.5 GHz, and the 10 dB rejection stopband can be extended to more than 15 GHz. The filter is useful for many microwave system applications. - Author(s): L. Xia ; Y. Huang ; Z. Hong
- Source: Electronics Letters, Volume 44, Issue 20, p. 1200 –1201
- DOI: 10.1049/el:20082111
- Type: Article
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A 3–5 GHz low power BPSK modulated impulse radio ultra-wideband (IR-UWB) transmitter is presented. In this design, the amplitude and spectrum of the output impulses are both tunable to solve the special problem, which is the difficulty in controlling the spectrum in IR-UWB. The total power consumption is only 4.44 mW at 100 MHz data rate. - Author(s): A.G. Martinez-Lopez ; J. Rodríguez-Cuevas ; J.I. Martinez-Lopez ; A.E. Martynyuk
- Source: Electronics Letters, Volume 44, Issue 20, p. 1201 –1203
- DOI: 10.1049/el:20081252
- Type: Article
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A p–i–n diode X-band circular waveguide SPST switch with polarisation diversity has been designed, fabricated and tested. Special design of the bias circuits ensures minimum insertion loss, better than 0.1 dB, and maximum isolation of 29 dB at X-band frequencies.
Compact ultra-wideband bandpass filter using broadside coupled hairpin structures on multilayer liquid crystal polymer substrate
Design of compact, broad-stopband lowpass filter using modified stepped impedance hairpin resonators
Low power amplitude and spectrum tunable IR-UWB transmitter
X-band circular waveguide switch with polarisation diversity
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- Author(s): I. Kostic
- Source: Electronics Letters, Volume 44, Issue 20, p. 1203 –1204
- DOI: 10.1049/el:20081934
- Type: Article
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A unified and exact analysis of the symbol error probability (SEP) for M-ary doubly-differential phase-shift keying (M-DDPSK) is presented. The SEP is expressed in terms of Fourier coefficients of the probability density function of the composite phase at the receiver input which are available for several channel scenarios including the additive white Gaussian noise, the fading, the fading-shadowing and the cochannel interference type of channel. Useful numerical results, obtained through the analytical expressions derived, are presented to compare the performance of 8-DDPSK and 8-DPSK over a channel in which, in addition to additive noise, a constant carrier frequency shift and Nakagami fading affect the transmission. - Author(s): P. Theofilakos and A.G. Kanatas
- Source: Electronics Letters, Volume 44, Issue 20, p. 1204 –1206
- DOI: 10.1049/el:20081926
- Type: Article
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Antenna subarray formation is a novel RF pre-processing technique that reduces hardware complexity of multiple-input multiple-output systems while alleviating the performance degradation of conventional antenna selection techniques. With this method, each RF chain is allocated to a linear combination of the responses of a subset of the available antenna elements, which is performed in the radio frequency domain. A novel, analytical, suboptimal algorithm is introduced for receive antenna subarray formation based on instantaneous channel information that maximises the effective channel capacity. - Author(s): T.Q. Duong and V.N.Q. Bao
- Source: Electronics Letters, Volume 44, Issue 20, p. 1206 –1207
- DOI: 10.1049/el:20081952
- Type: Article
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The performance of decode-and-forward (DF) co-operative networks with relay selection is presented. Specifically, closed-form expressions are derived for symbol error probability, bit error rate, and the achievable spectral efficiency of the DF relay selection system in independent but not identically distributed (INID) Rayleigh fading channels taking into account the incapability of decoding the received signals' cyclic redundancy code at the relays. Monte-Carlo simulations were performed to validate the analysis. - Author(s): J. Chen ; X. Cao ; Y. Xiao ; Y. Sun
- Source: Electronics Letters, Volume 44, Issue 20, p. 1208 –1209
- DOI: 10.1049/el:20081574
- Type: Article
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In wireless sensor and actuator networks (WSANs), because of unreliable transmission of sensory measurements and controller commands by wireless multi-hop, the controller's view of the system status is obscure and intermittent, resulting in infeasibility of direct analytical optimisation methods for WSAN applications. A simulated annealing based method is proposed, which features in stochastic trials and selective accepting. It is shown by simulations that the method is powerful in terms of satisfying user requirements. - Author(s): M.G. Sánchez ; A.V. Alejos ; I. Cuiñas
- Source: Electronics Letters, Volume 44, Issue 20, p. 1209 –1211
- DOI: 10.1049/el:20081191
- Type: Article
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Radio propagation experiments have been conducted to evaluate the performance of space diversity in quiescent indoor scenarios at 40 GHz. The optimum antenna separation for spatial diversity reception, in terms of branch signal correlation, has been found to be 10λ. The corresponding diversity gain, for an outage probability of 1%, ranges from 3 to 5 dB, depending on the combination technique used. From these results, we conclude that a spatial diversity technique at the receiver is adequate to reduce signal fading and to improve the radio system performance.
Average symbol error probability for M-ary DDPSK
Maximising capacity of MIMO systems with receive antenna subarray formation
Performance analysis of selection decode-and-forward relay networks
Simulated annealing for optimisation with wireless sensor and actuator networks
Space diversity performance in indoor radio channels at 40 GHz
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- Author(s): Y. Chen and T.M. Aulin
- Source: Electronics Letters, Volume 44, Issue 20, p. 1211 –1212
- DOI: 10.1049/el:20080949
- Type: Article
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A class of turbo-like codes with a crossover component, termed crossover product accumulate (CPA) codes is proposed. This structure is a serial concatenation of a crossover parallel concatenated code and an accumulator through an interleaver. A detailed iterative decoding scheme for CPA codes is described. Simulations show that different crossover depth makes CPA codes have different convergence in bit error rate (BER) performance, and a proper crossover structure produces faster convergence. - Author(s): S.K. Hong and J.-M. Chung
- Source: Electronics Letters, Volume 44, Issue 20, p. 1212 –1214
- DOI: 10.1049/el:20080969
- Type: Article
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An improved design criterion for distributed space–time trellis codes with amplify-and-forward relaying for the case of one relay is derived. The codes found by the new criterion are compared to conventional codes, and the results show that the new codes provide a performance gain over the conventional codes. - Author(s): J. Zhang ; T.Y. Zhang ; R.P. Yuan ; J.X. Huang
- Source: Electronics Letters, Volume 44, Issue 20, p. 1214 –1216
- DOI: 10.1049/el:20080574
- Type: Article
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A novel subspace-based detection scheme for space–time block-coded co-operative diversity is presented. By applying singular value decomposition to the received signal matrix, noise subspace orthogonal to a transmitted codeword is obtained. Detection without channel state information is achieved by searching for the codeword, including columns with the best orthogonal relationships to noise subspace. Such detection requires only the number of decoding relays and is robust to the fading channels varying from block to block, as verified by Monte-Carlo simulations.
Crossover product accumulate codes
Improved design criterion for distributed space–time trellis codes with AF relaying
Subspace-based detection for space–time block-coded co-operative diversity
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- Author(s): G. De Mey ; M. Felczak ; B. Wie˛cek
- Source: Electronics Letters, Volume 44, Issue 20, p. 1216 –1217
- DOI: 10.1049/el:20081081
- Type: Article
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Starting from experimental data, an analytical approximation is proposed for the thermal wake function. An integral equation is found relating the temperature with the power distribution. Using a mathematical property of the beta function, the integral equation can be solved analytically, yielding the optimum power density.
Exact solution for optimal placement of electronic components on linear array using analytical thermal wake function
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- Author(s): N. Li ; J. Tang ; Y.N. Peng
- Source: Electronics Letters, Volume 44, Issue 20, p. 1217 –1219
- DOI: 10.1049/el:20081215
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Adaptive pulse compression (APC) is an effective method for mitigating the mutual interference of the multiple waveforms transmitted in multiple-input multiple-output (MIMO) radar. But APC based on minimum mean-square error (MMSE) is computationally inefficient. Therefore, APC of MIMO radar based on a generalised sidelobe canceller (GSC) is proposed, which can effectively reduce the complexity. Numerical experiments show that the proposed method is superior to the matched filter (MF), and performs similarly as APC based on MMSE.
Adaptive pulse compression of MIMO radar based on GSC
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- Author(s): K. Bennamane ; M. DeMichielis ; G. Ghibaudo ; D. Esseni
- Source: Electronics Letters, Volume 44, Issue 20, p. 1219 –1220
- DOI: 10.1049/el:20080701
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The η parameter characterising the μeff(Eeff) curves in strained Si nMOS transistors is extracted for the first time. It is found that η is about 45% higher than in unstrained devices. Therefore, using a standard η value (0.5) instead of the real one implies underestimation of mobility at a high effective field and, in turn, systematic error in surface roughness determination in strained Si devices.
Extraction of η parameter characterising μeff against Eeff curves in strained Si nMOS devices
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- Author(s): D. Kim ; Y.-S. Hur ; J.H. Kim
- Source: Electronics Letters, Volume 44, Issue 20, p. 1220 –1222
- DOI: 10.1049/el:20081961
- Type: Article
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A method to compensate for the carrier leakage in wireless time-division duplex transceivers with shared baseband filters is presented. The proposed calibration method exploits the inherent architecture of the reconfigurable transceiver with shared baseband filters by directly estimating mixer phase mismatch first which then allows more effective compensation of carrier leakage. - Author(s): S. Lee ; J. Thompson ; J. Kim
- Source: Electronics Letters, Volume 44, Issue 20, p. 1222 –1223
- DOI: 10.1049/el:20081727
- Type: Article
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A multiuser scheduling algorithm in multiple input multiple output (MIMO) broadcast channels (BCs) is presented. It is likely that there is a time difference between obtaining channel state information (CSI) and using that CSI at the transmitter. This causes mismatches of the channel estimate in a temporally correlated MIMO BC. The proposed algorithm can minimise the effect of the delay-induced channel estimation error by exploiting statistical CSI for allocating multiple users into spatio-temporal slots in a cross-layer way.
Carrier leakage calibration with shared baseband filters
Statistical CSI-assisted multiuser scheduling in MIMO broadcast channels
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