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| Year : 2009 | Volume
: 55
| Issue : 5 | Page : 195 |
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Scanning the Issue
Shiban K Koul
Editor in Chief, IETE Journal of Research, India
| Date of Web Publication | 5-Nov-2009 |
Correspondence Address:
Shiban K Koul
Department of Electrical Engineering, Indian Institute of Technology, New Delhi - 110016
India
 DOI: 10.4103/0377-2063.57593
How to cite this article:
Koul SK. Scanning the Issue. IETE J Res 2009;55:195 |
The current issue of the IETE Journal of Research, Vol. 55, No. 5 (September-October 2009) contains eight articles. These articles present ongoing research and developments taking place in the broad areas of electromagnetics, signal processing, communications, microelectronics, control, and biomedical engineering.
The first paper "Bandwidth increasing technique using modified ground plane with diagonal edges" presents a simple technique to enhance bandwidth in a microstrip antenna using diagonal edges created in the ground plane. Simulation results obtained are validated through experimentation. By optimizing the depth of the diagonal cut, improvement of 18% in the bandwidth has been achieved.
The second paper "Fast and modular analog rank order filter using CMOS technology" presents a high-speed and high-precision CMOS design for constructing an analog rank order filter, where the rank of an input signal among a set of inputs is determined. The basic building block of two-input sorting element is discussed that is used to build any sorting network configuration.
The next paper on "Power allocation strategies for non-regenerative relay network in Nakagami-m fading channel" presents simulation studies of various power allocation strategies for a cooperative relaying network for a two-hop case, in the presence of full channel state information (CSI), no CSI, and statistical CSI. The utility of a relay node across mobile units in a cellular network is studied in the context of efficient power utilization.
In "Ambience based voice over internet protocol quality testing model," a method for the management of voice quality of a VOIP communication link is presented. A method for quality of service (QoS) evaluation is presented that includes ambient noise considerations and channel effects. An approach to improve audio quality by changing the signal level is presented under varying QoS conditions, which is tested for performance.
The next paper "Effects of dielectric constant mismatch on capacitive-voltage curve" studies the effects of a dielectric constant mismatch between the gate dielectric and silicon substrate using the coupled Schrodinger-Poisson equations. It is shown how the capacitance-voltage curves are affected with increased dielectric constant of gate dielectric, thickness of gate dielectric, and acceptor density. The results are supported with physical explanations.
In "Improved complementary metal oxide semiconductor digital pixel sensor," the limitations of a digital pixel sensor (DPS) are addressed. The performance limitations of DPS pixel with an analog comparator and inverter-based comparator are analyzed. These limitations are then sought to be overcome with a cascaded CMOS inverter-based comparator. The cascaded inverter-based comparator is analyzed for power and current dissipation through simulation studies.
The paper on "Simulation study on closed loop control algorithm of type 1 diabetes mellitus patients" gives a design of a robust controller to control blood glucose concentration in type 1 diabetic patients in the presence of disturbances due to eating. The design is tested for performance through simulations, and is shown to be able to work within acceptable limits and compensate for slow drifts in the monitored parameters.
The final paper titled "Wavelength assignment for all-to-all broadcast in wavelength division multiplexing optical ring" presents a wavelength assignment method for all-to-all broadcast in a bi-directional wavelength division multiplexing (WDM) ring network. The efficacy of the proposed method is proved and it is shown to be better than prior methods for wavelength assignment in a WDM ring network. Simulation results are presented to reinforce the proposals presented in the paper.
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