26-12-2012, 06:57 PM
LOCATION DRIVEN CAR MUSIC PLAYER ABSTRACT
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ABSTRACT
The aim of the project is to develop an embedded system to play songs automatically in car depends on the place. Example: this system automatically play’s devotional songs at temple place.
These systems develop for using RF technology and voice Ic. At various zones RF transmitter transmits the data , when Car reaches to that place depends on that data embedded system controls the music system and it plays related songs.
A wide range of systems and applications incorporate RF, microwave and wireless devices and signals, so advancing your fundamental knowledge is important for mastering many of today’s test and measurement applications. This set of RF, communications and wireless tutorials provides you with essential information about analog and digital modulation, I/Q data, RF and microwave specifications, performing spectral measurements as well as a over-arching glossary of RF and microwave terms. RF communication works by creating electromagnetic waves at a source and being able to pick up those electromagnetic waves at a particular destination. These electromagnetic waves travel through the air at near the speed of light. The wavelength of an electromagnetic signal is inversely proportional to the frequency; the higher the frequency, the shorter the wavelength.
Frequency is measured in Hertz (cycles per second) and radio frequencies are measured in kilohertz (KHz or thousands of cycles per second), megahertz (MHz or millions of cycles per second) and gigahertz (GHz or billions of cycles per second). Higher frequencies result in shorter wavelengths. The wavelength for a 900 MHz device is longer than that of a 2.4 GHz device.