EECS Graduate Student Conference Papers

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Ergodic channel capacity for amplify-and-forward (AF) half-duplex cooperative systems

Bi, Yu (Wichita State University. Graduate School, April 23, 2010)

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Abstract:	In this model, relay node assists the transmission from source node to the destination. The channel gain hsd,hsr,hrd are zero mean circular Gaussian. And the noise at relay and destination node is assumed i.i.d. zero-mean circular Gaussian with variance σ2. Since the cooperative system involves the product of Gaussian random variables, which is no longer Gaussian, we cannot use the conventional way to get the channel capacity. In this paper, author proposed a new method to get the channel capacity.
Description:	Paper presented to the 6th Annual Symposium on Graduate Research and Scholarly Projects (GRASP) held at the Hughes Metropolitan Complex, Wichita State University, April 23, 2010.Research completed at the Department of Electrical Engineering and Computer Science, College of Engineering
URI:	http://hdl.handle.net/10057/3270

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GRASP_2010 _p79-80.pdf (194.3Kb)

Evaluation of energy efficient medium access control (MAC) protocol for data-intensive sensor networks

Takahashi, Masaaki (Wichita State University. Graduate School, April 23, 2010)

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Abstract:	Data-Intensive Sensor Networks (DISNs) are sensor networks where large amount of different types of sensory data are sensed from physical environment and accessed by multiple users through networks such as the Internet. In such scenarios, networks are under heavy load andthe role of an energy efficient medium access control (MAC)9 becomes more significant than a typical wireless sensor networkdue to energy constraints. Rather than evaluating MAC protocols using typical metrics such as comparing energy consumption among different MAC protocols, this paper compares different radio devices impacting on battery life, finding which radio device is suitable for DISNs. In experiments, two radio devices RF230 and CC2420 are compared, showing RF230 is more energy efficient and suitable for DISNs.
Description:	Paper presented to the 6th Annual Symposium on Graduate Research and Scholarly Projects (GRASP) held at the Hughes Metropolitan Complex, Wichita State University, April 23, 2010.Research completed at the Department of Electrical Engineering and Computer Science, College of Engineering
URI:	http://hdl.handle.net/10057/3241

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GRASP_2010_187-188.pdf (118.4Kb)

Determination of all stabilizing fractional-order PID controllers

Lee, Yung K. (Wichita State University. Graduate School, April 23, 2010)

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Abstract:	A novel method for finding all fractional-order (FO) proportional-integral-derivative (PID) controllers that stabilize a given system of integer or non-integer order is proposed. The stability bounds of such FO PID controllers are calculated in the frequency domain and are given in terms of the proportional gain Kp, integral gain Ki and derivative gain Kd. In this paper, they will be plotted on the (Kp, Ki) plane. A key advantage of this approach is that it provides the stability boundaries even when the transfer function of a system is not available, as long as the frequency response of the system can be obtained. An example is presented to illustrate the effectiveness of this method.
Description:	Paper presented to the 6th Annual Symposium on Graduate Research and Scholarly Projects (GRASP) held at the Hughes Metropolitan Complex, Wichita State University, April 23, 2010.Research completed at the Department of Electrical Engineering and Computer Science, College of Engineering
URI:	http://hdl.handle.net/10057/3216

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GRASP_2010_137-138.pdf (146.5Kb)

Component-wise energy breakdown of laptop

Kothuru, Hemanth JS; Virupakshaiah, Girish Solur; Jadhav, Shraddha (Wichita State University. Graduate School, April 23, 2010)

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Abstract:	In the modern age, there is an exponential growth in the usage of laptops for computing and communication. However, the battery life of laptops is only a few hours at best. Further, studies indicate that laptops have a stake of approximately one percent in the overall global energy consumption. Thus, there are significant incentives to minimize energy consumed by laptops. To achieve this goal, it is important to understand the energy consumed by each component of a laptop. In this work, we systematically studied the power consumed by each component of a modern laptop. Our results indicate that wireless communication is a significant consumer of power along with obvious power hogs like the Display, Graphics card and the Processor.
Description:	Paper presented to the 6th Annual Symposium on Graduate Research and Scholarly Projects (GRASP) held at the Hughes Metropolitan Complex, Wichita State University, April 23, 2010.
URI:	http://hdl.handle.net/10057/3214

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GRASP_2010_133-134.pdf (74.28Kb)

PI controller design for robust stability of a steam generator unit in the presence of additive uncertainty

Gogoi, Manoj (Wichita State University. Graduate School, April 23, 2010)

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Abstract:	A graphical design method for finding all achievable Proportional Integral (PI) controllers that stabilize a non-reheat steam generator unit for a range of plant parameters has been introduced. Additive Uncertainty is used to describe the uncertain perturbed system for simplification of design. A key advantage of this procedure is that it depends only on the frequency response of the system and does not require the plant transfer function coefficients.
Description:	Paper presented to the 6th Annual Symposium on Graduate Research and Scholarly Projects (GRASP) held at the Hughes Metropolitan Complex, Wichita State University, April 23, 2010.Research completed at the Department of Electrical Engineering and Computer Science, College of Engineering
URI:	http://hdl.handle.net/10057/3195

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GRASP_2010_107-108.pdf (351.8Kb)

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