Satellite Digital Audio Radio Service (SDARS):

SDAR is a direct broadcast satellite service in which
digitally encoded audio entertainment material is transmitted to
Terrestrial receivers, either directly from an orbiting satellite, or from the satellite to
the receiver through a repeater station (This is a special case where the receiver is in a
protected location). SDARS is a radio communication service through which audio
programming is transmitted digitally by one or more space stations directly to
fixed, mobile and/or portable stations, and which may involve complementary services
ground repeater transmitters, telemetry, tracking and control facilities.
Through SDARS, CD-quality audio is available due to digital transmission.
is employed.

History of satellite radio:

Satellite radio is an idea of ​​more than a decade. In 1992, the US
The Federal Communications Commission (FCC) allocated spectrum in the
“S” band (2.3 GHz) for national satellite broadcasting
Digital Audio Radio Service (DARS). Only four companies applied for a
license to broadcast on that band. The FCC licensed
to two of these companies in 1997. CD Radio (now Sirius Satellite Radio) and
American Mobile Radio (now XM Satellite Radio) paid more than $80 million each
to use the space in the S band for digital satellite transmission. The first satellite radio launched by XM on September 25, 2001, followed by Sirius on July 1, 2002.

At this time, there are three space-based radio stations:

Syrian Satellite Radio

XM Satellite Radio

WorldSpace Satellite Radio

Importance and significance of satellite radio:

We all have our favorite radio stations that we preset in our car.
radios, switching from one to another as we drive to and from work, wander
and around the city. But when you get too far from the home station, the
the signal breaks up and fades into static. Most radio signals can only travel about 30
or 40 miles from its source. On long trips that find you passing through
different cities, you may have to change radio stations every hour or so as the signals fade
and out. Now imagine a radio station that can transmit its signal from over 35,000 km (22,000 miles) away and then broadcast it on your car radio with total clarity. one could drive
almost hundreds of kilometers without having to change the radio station! Nope
only you would never hear the static interfering with your favorite songs, but also the
the music would be interrupted by few or no commercials.

Satellite radio companies are comparing
the importance of its service to the impact that cable television had on
television 30 years ago. Listeners will not be able to pick up local stations using
satellite radio services, but they will have access to hundreds of stations that offer a
variety of musical genres. Each company has a different plan for its issuance
but the systems share similarities.

XM Satellite Radio, Sirius Satellite
Radio and WorldSpace satellite provides digital audio individually
radio services (SDARS), with commercial-free programming, digital audio quality and
nationwide coverage. Each company offers close to 100 digital music channels and
radio programs (many of them without commercials or with a reduced number of commercials)
that can be received from coast to coast without interruption of service. Each
By offering various music channels, these services clearly offer programming options.
not available through traditional radio.

One of the main features of SDARS is that SDARS provides free almost commercial programs (or commercial ones are restricted). And it also provides news, weather and sports in addition to
entertainment programs The main application of this service is the constant coverage of car radio from coast to coast. We have all experienced the problem of trying to listen to the radio on a long trip. Both AM and FM stations fade in and out as we move in and out of their coverage
area. Full portable satellite radio service available today for
car, home stereo, and personal radio environments. Automakers have been installing satellite radio receivers in some models for several years, and
Various models of portable satellite radio receivers are available in a variety of
electronics companies.

Signal reception is generally poor and variable in the cases of AM or FM. With SDARS systems, radio coverage in the lower 48 states is strong and continuous. Unlike
for AM and FM channels, SDARS signals are available in a single format

Subscription radio service:

Because the technology requires access to a commercial satellite to
signal propagation; Satellite radio services are commercial businesses
entities (not individuals), which offer a package of channels as part of their service
–Require a subscription from end users to access your channels. satelite
The radio service can be subscribed at a monthly fee of $12.95 US and up to which
It is well worth it for the service it provides.

Future of satellite radio:

SDARS seems to have a good growth in the market due to the following factors. Growing
XM and Sirius’ partnerships with auto OEMs and outlets made the
most popular SDARS. Smaller and more convenient hardware introduction
portable radios for both car and home stereo,
computing and office and personal environment made possible in the
Same time.

Home and personal use Industry promotional advertising and
awareness campaigns given the most popular SDARS. Sirius and XM now
they also offer subscribers the option to listen to their programming
online. Apart from all of this,
drop in the price of hardware making it more affordable to purchase on the secondary market.

The author can be contacted via [email protected] for more
SDARS information.