Abstract This thesis investigates several types of Sigma-Delta modulators in different conditions as a possible solution to the all-digital audio and wifi signal receivers. In this research, two main approaches are under consideration. Oversampling is a technique to design a sigma-delta modulators. Undersampling(or subsampling) is an interesting technique which allows the sigma-delta modulators to sample high frequency signals such as WIFI and GNSS signals. Time-interleaving modulation is another
Data: Data is studied as the lowest part of abstraction level from which knowledge and information can be derived. Data is always a raw form of information. It can be a collection of images, numbers, inputs, characters or any other outputs that can be converted into symbolic representation. Information: Information refers to data that provides a meaningful connection between them. Here, data refers to the collection that can be processed to provide useful answers which leads to an increase in knowledge
spread of various wireless devices and technologies engaging static frequency access and to cope up with this demand, Cognitive Radio is a solution of enormous outlook. This article discusses spectrum scarcity problem in wide band. To solve high sampling rate problems in wide band, compressive sensing is done here.A wide band signal is passed through fading channels and then it is estimated using ℓ1 magic technique. Then receiver-operating characteristic curve of the evaluated signal is estimated
velocity, bed height, and Gmiddle. The mathematical model between the mismatch rate (ε) and above factors was further established by the regression analysis. The separation results indicated that the feed particles with more Gmiddle have a negative effect on the density stability and could be removed from the bed
out application of waveform coding techniques for digital audio transmission and digital audio recording. Part A: Source Coding in Digital Audio Systems
Control System Abstract—Networked Control Systems (NCS) are the control systems in which the control loops are closed through a communication network. In recent years, the use of Network Control System (NCS) have gained increasing attentions due to their cost effective and flexible applications. But one of the major challenges that need to be tackle in NCS is the delay of the data transmission which occurs throughout the communication network and thus degrades the control system performance
and voices Biometric identification systems are categorized into main physical characteristic that lend itself to biometric identification. The most familiar biometric identification system is the fingerprint identification. Since we can judge by sight whether a signature matches another one, this method has been time-proven and is legally-binding, (William and Lee, 2003). Through computer the ones that we cannot recognize like the pressure of pen or speed and its rhythms on traverse of the page
Kathleen Ruttenberg Abstract Diel changes in the marine carbonate chemistry of reefs are thought to be primarily biologically-driven. The presence of groundwater discharge in nearshore reefs may complicate our understanding of carbon cycling in these systems, however. Here we show that coastal groundwater inputs shift and heighten biologically-induced changes in marine pH, driving natural acidification and CaCO3 dissolution along a salinity gradient in two Hawaiian coral reefs. We examined two contrasting
phosphorus, nitrogen, ammonia or BOD in the water relate to the families of macroinvertebrates present. Different methods have been used to help collect and identify macroinvertebrates and monitor pollution levels. This review mainly focuses on the kick sampling technique for collecting macroinvertebrates. It then describes the methods that are used to collect the levels of ammonia, phosphorus, BOD and nitrogen. Foy et al (2001) wished to access the effectiveness of regulatory controls on farm pollution
Abstract—Networked Control Systems (NCS) are the control systems in which the control loop is connected through a communication channel. There has been an increased attention to the use of Network Control System (NCS) in recent years because of their cost effective and flexible applications. But one of the major issues that need to be studied and solved in NCS is the delay of the data transmission which occurs throughout the communication network in the system and thus degrades the control system performance and