Browsing Electrical Engineering by Publication Date
Now showing items 1-20 of 2349
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M-Profile ray tracing technique for multipath propagation
( IET , 1987 , Article)A model for the modified refractivity is suggested and used in a new and simple ray tracing approach for multipath propagation. The technique is then used to study the variations in ray path parameters for different path ... -
On the Design of Bit-Slice Processors
( Qatar University , 1988 , Article)In the past decade, fixed instruction microprocessors have evolved from 4 bits to 32 bits. Their compact design and relative low cost have made them very popular with design engineers. Their use extends into a lot of ... -
Performance Evaluation of A Class of Adaptive Bifurcated Routing Algorithms
( Qatar University , 1988 , Article)With the cost of computation decreasing, packet-switched computer communication networks are becoming increasingly cost effective. In this paper a class of bifurcated routing algorithms is considered. One of the algorithms ... -
A Coupled Vector-scalar Potential Method For Permanent Magnet Modeling in Large-scale 3d-Fe Magnetic Field Computations
( IEEE , 1993 , Conference Paper)This paper introduces a magnetic scalar potential (MSP) formulation of permanent magnet (PM) modeling. This formulation is suited for use in coupled (combined) vector-scalar magnetic potential (CMVP-MSP) 3D-FE algorithms ... -
Speed control of induction motor without rotational transducers
( IEEE , 1999 , Article)This paper describes a newly developed speed sensorless drive based on neural networks. A backpropagation neural network is used to provide real-time adaptive identification of the motor speed. The estimation objective is ... -
Theory and simulation of a miniature zirconia sensor for control of the air-to-fuel ratio in combustion systems
( IEEE , 2001 , Article)The theory of operation on both sides of stoichiometry of a miniature zirconia oxygen pump-gauge incorporating a diffusion hole is discussed. Computer simulation of the sensor output when used for monitoring the air-to-fuel ... -
New Heuristic Strategies for Reactive Power Compensation of Radial Distribution Feeders
( IEEE , 2002 , Article)In this paper, the authors introduce two new heuristic techniques for reactive power compensation in radial distribution feeders. The methods can be considered as generalization ideas that emerged from recent heuristic ... -
A methodology for time-frequency image processing applied to the classification of nonstationary multichannel signals using instantaneous frequency descriptors with application to newborn EEG signals
( Springer , 2003 , Article)This article presents a general methodology for processing non-stationary signals for the purpose of classification and localization. The methodology combines methods adapted from three complementary areas: time-frequency ... -
Average ber of multihop communication systems over fading channels
( IEEE , 2003 , Conference Paper)Multihop transmission is a way to attain broader coverage by splitting the communication link from the source to the destination into several, possibly shorter links/hops. This paper presents an expression for the moment ... -
End-to-end performance of transmission systems with relays over Rayleigh-fading channels
( IEEE , 2003 , Article)End-to-end performance of two-hops wireless communication systems with nonregenerative relays over flat Rayleigh-fading channels is presented. This is accomplished by deriving and applying some new closed-form expressions ... -
A new iterative learning control method for PWM inverter current regulation
( IEEE , 2003 , Conference Paper)AC servomotor speed or current controller based on PI control and/or optimal control, can not eliminate the cyclical fluctuations of speed or current when subject to periodic disturbances. PWM inverters output waveforms ... -
Digital control for UPS inverters
( IEEE , 2003 , Conference Paper)PWM inverters digital controls with dead-beat re sponse, for UPS applications, are reviewed. To improve the output waveforms of the PWM inverter, several modern control techniques are applied together with the deadbeat ... -
Performance enhancement of relay-assisted communications via binary feedback
( IEEE , 2004 , Conference Paper)This paper proposes a modified two-hop wireless communication system and studies its performance. The modified system has a reliable feedback channel that carries a binary signal from the receiver to inform the transmitter ... -
Optimal power allocation for relayed transmissions over Rayleigh-fading channels
( IEEE , 2004 , Article)Relayed transmission is a way to attain broader coverage by splitting the communication link from the source to the destination into several shorter links/hops. One of the main advantages of this communication technique ... -
Performance of OFDM with M-QAM modulation and optimal loading over rayleigh fading channels
( IEEE , 2004 , Conference Paper)We present optimum bit and power loading algorithms for orthogonal frequency division multiplexing (OFDM) systems using an M-ary quadrature amplitude modulation (M-QAM) scheme. Several scenarios for the amount of channel ... -
A performance study of dual-hop transmissions with fixed gain relays
( IEEE , 2004 , Article)This letter presents a study on the end-to-end performance of dual-hop wireless communication systems equipped with nonregenerative fixed gain relays and operating over flat Rayleigh-fading channels. More specifically, it ... -
Precise method for linearizing sine and cosine signals in resolvers and quadrature encoders applications
( IEEE , 2004 , Conference Paper)Resolvers and quadrature encoders provide electrical signal related to the sine and cosine of the mechanical shaft angle over the full 360 degree range. A converter is described for the linearization of these signals, ... -
Design and Assembly of Miniature Zirconia Oxygen Sensors
( IEEE , 2004 , Article)Zirconia oxygen sensors are highly selective solid-state devices used for many applications, including combustion control for better fuel economy and lower emissions. Stabilized zirconia electrolyte meets the device ... -
A Novel Resolver-to-360° Linearized Converter
( IEEE , 2004 , Article)A novel and simple resolver-to-dc converter is presented. It is shown that by appropriate processing of the sine and cosine resolver signals, the proposed converter may produce an output voltage proportional to the shaft ... -
Average outage duration of multihop communication systems with regenerative relays
( IEEE , 2005 , Article)Closed-form expressions for the average outage duration (AOD) of multihop regenerative communication systems over generalized fading channels are presented. Both noise-limited and interference-limited systems are studied. ...
