Introduction to Satellite Digital Audio Radio service(SDARS)


Digital Satellite Radio Service (SDARS):

SDAR is a direct broadcast satellite radio service in which

Digitally encoded audio entertainment equipment is broadcast to

Terrestrial receivers, either directly from a satellite in orbit, or from satellite to

receiver via a repeater station (this is a special case in which the receiver is in

shielded location). SDARS is a radio communication service through which audio

programming is transmitted numerically by one or more space stations directly to

fixed, mobile and / or portable, and may include additional functions

terrestrial repeaters, telemetry, monitoring and control.

Thanks to SDARS, the audio quality of compact discs is available thanks to digital transmission

Is used.

History of satellite radio:

Satellite radio is an idea that has lasted for a decade. In 1992, the United States

The Federal Communications Commission (FCC) has assigned a spectrum to

"S" band (2.3 GHz) for national broadcasting of satellite services

Digital audio radio service (DARS). Only four companies applied for

broadcast license on this tape. The FCC has issued licenses

to two of these companies in 1997. CD Radio (now Sirius Satellite Radio) and

American Mobile Radio (now XM Satellite Radio) has paid more than $ 80 million each

to use the S-band space for digital satellite transmission. The first satellite radio launched by XM on September 25, 2001, then by Sirius on July 1, 2002.

At the moment, there are three space broadcasters:

    Sirius Satellite Radio
    XM Satellite
    WorldSpace Satellite Radio

Importance and significance of satellite radio:

We all have our favorite radio stations that we have predefined in our car

radios, turning them around while we went to work, doing errands

and around the city. But when you get too far away from the source station, the

the signal breaks and disappears in static. Most radio signals can only circulate about 30

or 40 miles from their source. On long journeys that take you through

in different cities, you may need to change your radio station approximately every hour as the signals appear.

and outside. Imagine now a radio station capable of broadcasting over 35,000 km and then emitting on your car radio with perfect clarity. We could drive

hundreds of kilometers without having to change radio stations! do not

only you will never hear static interfere with your favorite songs but also the

the music would be interrupted by little or no commercials.

Satellite radio companies compare

the importance of their service to the impact that cable television has had on

television 30 years ago. Listeners will not be able to pick up local stations using

satellite radio, but they will have access to hundreds of stations offering

variety of musical genres. Each company has a different plan for its broadcasting

system, but the systems share similarities.

XM satellite radio, Sirius satellite

Radio and WorldSpace Satellite individually provide digital audio signals

radio services (SDARS), with ad-free programming, digital audio quality and

coverage throughout the country. Each company offers nearly 100 digital music channels and

talk radio (many of them without advertising or with a reduced number of commercials)

which can be received from coast to coast without interruption of service. Each

offering multiple music channels, these services clearly offer programming options

not available by traditional radio.

One of the key features of SDARS is that SDARS provides almost free (or commercial) programs. And also it provides news, weather forecasts and sports outside of

Entertainment Programs The main application of this service is the constant coverage of radio from coast to coast to coast. We all encountered the problem of trying to listen to the radio during a long trip. AM and FM stations fade in as we enter and leave their covers

region. Full service portable satellite radio available now a few days to

the car, the home stereo and the personal radio. Car manufacturers have been installing satellite radio receivers on some models for a few years now, and

several models of portable satellite radio receivers are available from various

electronic companies.

The reception of the signal is generally low and variable in the case of amplitude modulation or frequency modulation. With SDARS, radio coverage in the 48 continental states is strong and continuous. contrary to

for AM and FM channels, SDARS signals are available in a single format

Subscription radio service:

Because technology requires access to a commercial satellite to

signal propagation; Satellite radio services are commercial services

(non-private) entities that offer a set of channels as part of their services

– requires a subscription from end users to access its channels. Satellite

The radio service can be purchased for a monthly fee of US $ 12.95 and more

Well worth it for the service this gives.

The future of satellite radio:

SDARS appears to be experiencing good market growth due to the following factors. Increasing

XM and Sirius' partnerships with automakers and outlets have enabled

SDARS more popular. Introduction of smaller and more practical material

portable radios for the automobile as well as the hi-fi system,

computer and office environment and personnel made possible at

at the same time.

Reception and personal use Promotional advertising of the sector and

Awareness campaigns given the most popular SDARS. Sirius and XM now

also offers subscribers the opportunity to listen to their programming

online. Apart from all that,

lower hardware prices making it more affordable for after-market purchases.

The author can be contacted by [email protected] for more

information on SDARS.

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