Radio has made a comeback in the lifestyles of Indians. Radio has the reputation of being the oldest and the cheapest medium of entertainment in India. The radio industry has been completely reshaped by the various private players that entered the sector after the government allowed foreign investment into the segment and opened the licenses to the private players.
DIFFERENT TECHNOLOGIES IN BROADCAST RADIO
The first one which was used in olden days for transmission purpose is AM.
Amplitude modulation (AM)1 is a technique used in electronic communication, most commonly for transmitting information via a radio carrier wave.
Frequency modulation (FM) is a form of modulation that represents information as variations in the instantaneous frequency of a carrier wave. FM is commonly used at VHF radio frequencies for high-fidelity broadcasts of music and speech. Today radio is used for many forms of communication from long distance satellite communications to the personal cell phones
that are widely used. In addition to this wireless communications are becoming more important for data as demonstrated by the rapid growth in Wi-Fi
Radio is also used for telecommunications links. Signals with frequencies in the microwave region are normally used. These signals have frequencies much higher than those in the short wave band and they are not affected by the ionosphere. However they provide reliable direct line of sight links that are able to carry many telephone conversations or other forms of traffic.
Satellite radio
Satellite radio is one of the fastest-growing entertainment services in the world and it is making its presence felt in a small but a positive way in India. A satellite radio is basically a digital unit that receives signals broadcast by communications satellite. This allows a person with a set to follow his favorite stations anywhere in the country unlike the terrestrial radio (AM and FM) whose signals are limited to a certain area depending on the power?
Source: http://nyessay.com/history/indian-radio/
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