Definition
Multi Carrier Modulation is a technique for data transmission by dividing a high ?]bit rate data stream is several parallel low bit ]rate data streams and using these low bit rate data streams to modulate several carriers. Multi Carrier Transmission has a lot of useful properties such as delay spread tolerance and spectrum efficiency that encourage their use in untethered broadband communications. OFDM is a multi carrier modulation technique with densely spaced sub carriers that has gained a lot of popularity among the broadband com ....etc

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Definition

RF light sources follow the same principles of converting electrical power into visible radiation as conventional gas discharge lamps. The fundamental difference between RF lamps and conventional lamps is that RF lamps operate without electrodes .the presence of electrodes in conventional florescent and High Intensity Discharge lamps has put many restrictions on lamp design and performance and is a major factor limiting lamp life.

Recent progress in semiconductor power switching electronics, which is revolutionizing many facto ....etc

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A ZigBee and ZigBee-to-IR Device Control Scheme for Single Media Multi Devices


Abstract

This paper has a background of SMMD (Single
Media Multi Device) control technology for causing various
actual feeling effects about one media source. SMMD technology
adds metadata controlling arbitrary multiple devices in one
MPEG-4 media. A home server produces a control command
from metadata and delivers control message to a sensory effect
device using the ZigBee comm ....etc

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The use of cognitive radio techniques in wireless mobile networks can lead to significant capacity increase. Cognitive radios sense the radio spectrum environment and to switch dynamically to available frequency ranges. a framework for applying cognitive radio technology to mobile WiMAX is described in this article. In this framework , the base stations are
equipped with sensitive detectors which dynamically assign channels to
subscriber station depending upon the on spectrum availability. The frequency reuse is increased by Power control. ....etc

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hi i want Doc about this project plz forward to me it is urgent
....etc

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Frequency Division Multiple Access Used for AMPS and TACS, the two key analog systems and their variants, this system gives each conversation its own unique radio channel. Division of a radio frequency into several channels by splitting the frequency band into distinct segments, which are assigned to various callers. This allows a single base station to serve many callers. For example, a typical AMPS network will have 832 channels spaced approximately 30 kilohertz apart. - Frequency Division Multiple Access, digital transmission technology that ....etc

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i want document about this project
Abstract ⎯ This paper has a background of SMMD (Single
Media Multi Device) control technology for causing various
actual feeling effects about one media source. SMMD technology
adds metadata controlling arbitrary multiple devices in one
MPEG-4 media. A home server produces a control command
from metadata and delivers control message to a sensory effect
device using the ZigBee communication. A device produces an
internal interface command or specific IR code for controlling an
actual feel ....etc

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Power frequency magnetic fields as high as 15,000,000 milligauss are commonly found internally in equipment such as power transformers, motors and generators .Although these fields are almost contained within the equipment ,some leakage will occur. This paper concentrates on magnetic fields in the range of zero to several hundred milligauss. This level of magnetic field may be experienced by the general public as a result of operation of electrical equipment, current carrying lines, house wiring, electrical appliances, lighting equipment or an ....etc

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This article is presented by:M.MAHITHA, M.Tech.,(DECS)
Mr. P. MADHU KUMAR, M.E.,
Sri Vidyanikethan Engineering College, Assistant Professor, Department of E.C.E.
Sree Sainath Nagar, Tirupathi, Andhra Pradesh, INDIA AN IR AND ZIGBEE-TO-ZIGBEE SCHEME FOR
CONTROL OF MULTIPLE DEVICES


ABSTRACT
Remote control is already part of the everyday Life.However, there is no truly single remote which can Control all appliances at home.There are many various CE (Con ....etc

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A Technique for Orthogonal Frequency Division Multiplexing
Frequency Offset Correction

Abstract:
The Orthogonal Frequency Division Multiplexing (OFDM) is a Multi Carrier Modulation technique employing Frequency Division Multiplexing of orthogonal subcarriers. It is also sometimes called as discrete multitone modulation (DMT). It is better than CDMA in high bit rate and Broadband Communications .It is a multi carrier technique, which is very sensitive to Frequency Offset between transmitter and receiver. Th ....etc

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