Allocation of Spectrum
The word ‘Spectrum’ basically refers to a collection of various types of electromagnetic radiations of different wavelengths. In India, the radio frequencies are arbitrarily confined between 9 kHz and 3000 GHz and are being used for 40 different types of services like fixed communication, mobile communication, broadcasting, radio etc.
The limitation of the radio frequency spectrum is mainly due to the following factors
- Propagation characteristics of different types of radio waves.
- Availability of technology and equipment for different types of radio frequency spectrum applications.
- The suitability of frequency bands for specific applications
The International Telecommunication Union (ITU) at the World Radio communication Conferences allocates spectrum frequencies for the use of various countries
Need for spectrum allocation:
- Spectrum allocation is necessary in order to ensure interference free operation for each radio service.
- Each frequency band is shared amongst various radio services but the sharing is possible only with the use of similar systems.
- Sharing is also possible by way of geographical separation, time-sharing and through technical solutions like smart antenna and intelligent radio system.
Some of the typical frequency bands allocated for certain types of radio services in India are as given below