FM radio is one technology which became a part of our lives very long ago. It is used widely in all the regions of the world. It is obvious that each region will have different frequency modulation but the core idea of its operations remains the same everywhere. However, it is unfortunate to highlight that despite various technology sophistications, radio has been neglected. Today we have moved from analog to digital broadcasting in television. So the question arises that why has radio not experienced better technology?
The answer to this question can be obtained by considering why did the television technology switch from analog to digital broadcasting? There are two basic reasons; firstly, analog television used 6-8 MHz bandwidth to broadcast one program, whereas the digital television uses the same bandwidth to broadcast a package of television channels and services. Obviously this means that digital broadcasting is making a more efficient use of radio spectrum. Secondly, both the services use radio spectra to broadcast; therefore it was a step by step transfer of technology from analog to digital broadcasting, which took years to happen. Same is the case with radio, it might happen, but it will require years and large scale technological preparations.
There are many digital sound broadcasting technologies present that can provide good sound output with good reception like T-DAB, DRM+, DVB-T, DRM and DVB-T2; but none of these is satisfactory enough so as to replace the analog radio broadcasting. It is important to thoroughly take into account various technological aspects before switching from one technology to another. Factors like the new technology’s ability to provide good quality sound output, ability to receive signals and most importantly, its capacity to make efficient use of radio spectrum by broadcasting more radio channels.
For FM radio operations, 250 kHz of bandwidth and 100 to 200 kHz of spacing are required. This combination of bandwidth and spacing varies from region to region. It is because of this change, the technology switch from analog to digital, will be difficult to make. Hence, for a couple of years in future too, we will get entertained by analog radio broadcast!
In the end, it is significant to mention that up-gradation in scientific technology is not a matter of a few months or decisions of a small organization. Rather, many years efforts, time investment, financial investment and consistent dedication are required for a technology to switch from its current level to a higher level. Sophistication in technology is highly desired by all in various fields, because it not only results in provides comfort to the users but also becomes a source of pride to the inventors. The same is the case in upgrading radio technology but the other factors which are currently making the switch from analog to digital technology can also not be neglected.
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