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WiMAX (Worldwide Interoperability for Microwave Access) is emerging as one of the most promising technology for wireless communication network in metropolitan areas today. It is designed to provide different services such as voice, data and video with different type of QoS(Quality of Service). A scheduling scheme plays a very important role to achieve the QoS requirement. There are scheduling algorithms...
A directed acyclic network is considered where all the terminals need to recover the sum of the symbols generated at all the sources. We call such a network a sum-network. It is shown that there exists a solvably (and linear solvably) equivalent sum-network for any multiple-unicast network, and thus for any directed acyclic communication network. It is also shown that there exists a linear solvably...
A vehicular ad-hoc network (VANET), is an instance of intelligent transportation system that provides vehicle-to-vehicle communication aided by road side infrastructure for in-vehicle entertainment and safer road environment. VANET is characterized by highly mobile vehicles, predetermined topology and the requirement of reliable time bound message delivery over error prone shared wireless medium....
Meta search engine searches information using multiple independent search engines. World wide web has been developed to a distributed information space nearly more than 800 million working stations and several billion pages, which brings the people great trouble in finding needed information although huge amount of information available on webs. The focus of this paper is to design and implementation...
Channel length of a top contact Organic Thin Film Transistor (OTFT) is usually defined during its fabrication by optical lithography or shadow masking during metal deposition process. Realizing short channel (sub-ten micron channel length) transistors by lithography requires costly equipments. On the other hand, it is extremely challenging to achieve short channel transistors using low cost shadow...
Most of encoding methods proposed in recent years has dealt with only RC modeled VLSI interconnects. With growing importance of inductive effects, it is now almost mandatory to design encoders that operates on RLC modeled VLSI interconnects. Therefore, this research work introduces an efficient bus encoder that employs Bus Inverting (BI) method to dramatically reduce crosstalk in RLC modeled interconnects...
The differences in drain current and drain voltage characteristics of top gate and bottom gate Organic Thin Film Transistor (OTFT) structures are analyzed by two dimensional numerical device simulators. Further discussion shows different characteristics parameters of OTFTs. Transistor based on organic semiconductor (conjugated or conducting polymers) as active layer to manage electric current flow...
Organic Thin Film Transistors (OTFTs) are promising devices for future development of variety of low-cost and large-area electronics applications such as flexible displays. This paper analyzes the performance of OTFT made of several organic semi conducting and insulating materials and further discusses their applications. Analysis of previous research work demonstrates that the mobility in OTFT decreases...
The performance of VLSI/ULSI chip is becoming less predictable as device dimensions shrinks below the sub-100-nm scale. Process variation is considered to be a major concern in the design of circuits including interconnect pipelines in current deep submicron regime. Process variation results in uncertainties of circuit performances such as propagation delay. The reduced predictability can be attributed...
Process variation is considered to be a major concern in the design of circuits including interconnect pipelines in current deep submicron regime. Process variation results in uncertainties of circuit performances such as propagation delay. The performance of VLSI/ULSI chip is becoming less predictable as device dimensions shrinks below the sub-100-nm scale. The reduced predictability can be attributed...
Every communication receiver that uses in-phase and quadrature channel signal processing technique encounters problems related to matching of gain and phase in both the channels. The gain and phase imbalances occur between Low Pass Filter and Local Oscillator used in both the channels and as a result the performance of the receivers and the quality of the received signals are degraded. The imbalances...
Digital Signal Processing (DSP) systems involve a wide spectrum of DSP algorithms and their realizations are often accelerated by use of novel VLSI design techniques. Now-a-days various DSP systems are implemented on a variety of programmable signal processors or on application specific VLSI chips. This paper presents the design of Adaptive Finite Impulse Response (FIR) filter for moving target detection...
Now-a-days various Digital Signal Processing systems are implemented on a platform of programmable signal processors or on application specific VLSI chips. Coordinate Rotation Digital Computer (CORDIC) algorithm has turned out to be such kind of programmable signal processor. In recent times, it has been a widely researched topic in the field of vector rotated Digital Signal Processing (DSP) applications...
We consider directed acyclic networks with multiple sources and multiple terminals where each source generates one i.i.d. random process over a finite field and all the terminals want to recover the sum of these random processes. The different source processes are assumed to be independent. The solvability of such networks has been considered in some previous works. In this paper we investigate on...
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