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DMA Controller


Posted by: seminar class
Created at: Thursday 21st of April 2011 11:53:35 PM
Last Edited Or Replied at :Friday 30th of November 2012 01:17:30 AM
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le including timing, priority schemes, and location, size and type of transfer.
A special, compressed timing mode is available in which transfers are made in just two cycles.Priority schemes are important. For example, if a DMA transfer is being made for a video display, then the DMA transfer should always take precedence over the CPU. Otherwise, blank spots will frequently appear on the screen.
You can make transfers whose source or destination is either a fixed I/O port or a block of memory. If the source or destination is in memory, then the address is automatically incremented (or decre..................[:=> Show Contents <=:]



Graphical Processing Unit


Posted by: computer science crazy
Created at: Sunday 21st of September 2008 10:54:55 PM
Last Edited Or Replied at :Sunday 21st of September 2008 10:54:55 PM
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handle intense computational requirements of displaying graphics. These were earlier known as 3D accelerators, because the main job of these units deals with objects represented in 3 dimensions. There are various applications that require a 3D world to be simulated as realistically as possible on a computer screen. These include 3D animations in games, movies and other real world simulations.

It takes a lot of computing power to represent a 3D world due to the great amount of information that must be used to generate a realistic 3D world and the complex mathematical operations that must be ..................[:=> Show Contents <=:]



DSP Enhanced FPGA


Posted by: computer science crazy
Created at: Sunday 21st of September 2008 01:53:06 PM
Last Edited Or Replied at :Friday 12th of November 2010 10:13:42 AM
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s and mapping them on VLIW processors are tedious and do not always give optimal solution. There are applications where even multiple of these DSPs cannot handle the computational needs of the applications.

Recent advances in speed, density, features and low cost have made FPGA processors offer a very attractive choice for mapping high-rate signal processing and communication systems, specially when the processing requirements are beyond the capabilities of off the shelf DSPs.

In many designs a combination of DSP and FPGA are used. The more structured and arithmetic demanding parts of t..................[:=> Show Contents <=:]



WIDEBAND OFDM


Posted by: computer science crazy
Created at: Sunday 21st of September 2008 01:13:47 PM
Last Edited Or Replied at :Thursday 01st of April 2010 04:15:58 AM
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ellent method for bi-directional wireless data communication. It is extremely efficient in mitigating common problems in high-speed communication such as multipath fading and RF noise interference. It can be considered as multiple access technique OFDMA....................[:=> Show Contents <=:]



Automated Eye-Pattern Recognition Systems


Posted by: computer science crazy
Created at: Sunday 21st of September 2008 12:53:45 PM
Last Edited Or Replied at :Thursday 17th of March 2011 11:11:48 PM
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fraudulent authentication and identity privacy and safety controls privileged access or authorised entry to sensitive sites, data or material. In addition to privacy protection there are myriad of applications were iris recognition technology can provide protection and security. This technology offers the potential to unlock major business opportunities by providing high confidence customer validation. Unlike other measurable human features in the face, hand, voice or finger print, the patterns in the iris do not change overtime and research show the matching accuracy of iris recognition syst..................[:=> Show Contents <=:]



Direct to home television DTH


Posted by: computer science crazy
Created at: Sunday 21st of September 2008 12:26:57 AM
Last Edited Or Replied at :Monday 01st of August 2011 11:18:36 PM
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specialized antennas called satellite dishes.
The television satellites are all in geosynchronous orbit approximately 35,700 km above the Earth. In this way you have to direct the dish at the satellite only once, and from then on it picks up the signal without adjustment.
More than 200 channels with excellent audio and video are made available. The dish required is quite small (30 to 95 cm in diameter).



The Overall System
Early satellite TV viewers were explorers of sorts. They used their expensive dishes to discover unique programming that wasn't necessarily intended for mass audi..................[:=> Show Contents <=:]



Multisensor Fusion and Integration


Posted by: computer science crazy
Created at: Saturday 20th of September 2008 11:58:10 PM
Last Edited Or Replied at :Thursday 05th of February 2015 07:27:00 AM
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elligent machines.

Sensors Evolution

A sensor is a device that responds to some external stimuli and then provides some useful output. With the concept of input and output, one can begin to understand how sensors play a critical role in both closed and open loops.

One problem is that sensors have not been specified. In other words they tend to respond variety of stimuli applied on it without being able to differentiate one from another. Neverthless, sensors and sensor technology are necessary ingredients in any control type application. Without the feedback from the environment that s..................[:=> Show Contents <=:]



Lightning Protection Using LFA-M


Posted by: computer science crazy
Created at: Saturday 20th of September 2008 11:39:22 PM
Last Edited Or Replied at :Sunday 17th of October 2010 11:56:38 PM
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There are two main ways in which the lightning may strike the power system . They are

1. Direct stroke

2. Indirect stroke

Direct Stroke

In direct stroke, the lightning discharge is directly from the cloud to the an overhead line. From the line, current path may be over the insulators down to the pole to the ground. The over voltage set up due to the stroke may be large enough to flashover this path directly to the ground. The direct stroke can be of two types

1. stroke A
2. stroke B

In stroke A, the lightning discharge is from the cloud to the subject equipment(e.g. over..................[:=> Show Contents <=:]



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