Journal of VLSI Design and Signal Processing (e-ISSN: 2581-8449)

DNA Logic Gates to Design Half Adder

2024-09-18T16:08:08+0530

The DNA molecule is indubitably the most powerful medium known for data storage and processing. But till now, DNA molecule has found little use in computing applications. For initiating computing application with DNA molecule, it requires to design DNA transistors which can be utilized to design basic gates to implement Boolean logic. Interestingly some recent researches have shown that it is very much possible to design a three terminal transistor like device architecture by controlling the flow of RNA polymerase along DNA with specific integrases. Along with that, very recently, fundamental experimental designs for realizing various basic Boolean logic functions have been demonstrated successfully with DNA molecule. Present work adopted, modified and extended such DNA logic gate concept to execute design simulation of a half adder circuit. The timing diagram for sum, carry, input and output has been simulated and results have been presented. With present research, it has been established that such DNA logic gate concept can be extended to complex circuits. At the same time, it has been also predicted that with the development of proper mathematical model for DNA transistor, a circuit simulator can be designed for designing and simulating bioelectronics circuit in near future.

Beamforming in Cognitive Radio Networks

2024-09-18T15:46:55+0530

Cognitive radio is a wireless communication technology which adds intelligence to the existing wireless communication scenario. This concept arises due to the heavy occupancy of frequency spectrum below 3 GHz which is caused by the ever growing demand for wireless services by the customers. This problem has placed a heavy burden to the resource allocation policy maker to accommodate between the demand and the available spectrum resources. In this paper, we address the problem of resource allocation in the context of cognitive radio networks (CRN).With the deployment of K antennas at the cognitive base station(CBS), an efficient transmit beamforming technique is proposed to maximize the Signal to noise ratio. We also used the smart antenna beamforming technique to enhance the error rate performance of the system. We simulated the result using MATLAB 7.5 and finally we analyzed the results for two cases, one when adaptive beamforming is used in the proposed system and second when adaptive beamforming is not used in the proposed system.

Compensating Threshold Voltage Roll-Off in Nanoscale MOSFET with Parameter Adjustment

2024-09-18T16:17:17+0530

During last few decades, the Silicon-On-Insulator (SOI) technology has been identified as a possible solution for reducing constrains over transistor miniaturization and to maintain continuous progress in semiconductor chip design industry. The SOI CMOS has numerous advantages over conventional bulk CMOS technology but it is not fully immune of several short channel effects. One of the primary impacts of short channel effects in SOI MOSFET is the degradation of device threshold voltage with decreasing channel length. Such threshold voltage degradation factor with reducing channel length is normally known as threshold voltage roll-off which restricts further scaling of SOI devices. But such roll-off factor can be adjusted by fine tuning the other structural parameters and this fact has been established with theoretical modeling and subsequent simulation under this present work. Under present analysis, a two dimensional generalized analytical threshold voltage model has been presented for nanoscale SOI MOSFET. Threshold voltage performance has been simulated and analyzed for various structural parameters e.g.; channel length, channel doping concentration, gate oxide thickness etc. Finally, how much fine tuning is required for various structural parameters (channel doping concentration and gate oxide thickness) to compensate threshold voltage roll-off factor at various channel length, has been calculated. The simulation results have shown that the unavoidable threshold voltage roll-off effect associated with technology scaling can be minimized by fine-tuning other device parameters.

Study of Embedded System

2024-09-18T15:58:53+0530

An embedded system typically does not appear as a computer, usually there is no keyboard or monitor or mouse.However, like any computer it has a processor and software, input and output. The word embedded suggests that it is designed into the system. It is a permanent part in a bigger system.

Automated Robot for Field Navigation in Multi-Floor Environments

2024-09-18T15:41:34+0530

In certain situations people need to go some places without having any previous knowledge about the locality. This condition may occur when the place is not visited ever before, or even when there is not any available sources to situate them in the current position. In those cases, the marks of the environment are essential for achieving the area. The same condition may happen for an autonomous machine, i.e., robot. This kind of robots must be talented of solving this problem in a talented way. In order to do this, the robot must use the resources present in their atmosphere. This paper offers a RFID based system, which has been developed to guide and give important information to an autonomous robot. This robot will detect the patient’s abnormal condition and it immediately communicates it to the doctor. This system has been implemented in a real indoor environment and it has been successfully proved in the autonomous and social robot. At the end of the paper, some experimental
results, carried out inside the hospital building, are discussed.

Speech Signal Processing

2024-09-18T16:45:37+0530

This computer code project based mostly paper is for a vision of the close to future during which pc interaction is defined by natural face-to-face conversations with lifelike characters that talk, emote and gesture. The first step is speech. The dream of a real computer game, a whole human-computer interaction system won't come back true unless we tend to try and offer some perception to machine and build it understand the skin world as humans communicate with one another. This software package project is below development for “listening and replying machine (Computer) through speech”.