Introduction
Basic Classification of Radio Resources

The radio resources can be distributed by a number of different sights. The radio resources can be classified for example according to:

- frequency band – narrowband radio systems and wideband radio systems
- direction of transmission – unidirectional radio systems and bidirectional radio systems
- configuration of radio systems – point-to-point and point-to-multipoint
- mobility of subscriber – fixed wireless local loop or mobile terminal
- used transmission resources – terrestrial links or satellite links
- licensed bands vs. unlicensed bands (quite essential for planning and creating of wireless networks)

According to portfolio of provided services, the radio resources and networks can be classified to voice, data, etc.

Other ways of the radio resources classification are for example according to:

- frequency band
- used modulation and coding scheme
- method used for sharing of the bandwidth (FDM (Frequency Division Multiplex) and TDM (Time Division Multiplex))
- access to shared resources (FDMA (Frequency Division Multiple Access), TDMA (Time Division Multiple Access), CDMA (Code Division Multiple Access) and OFDMA (Orthogonal Frequency Division Multiple Access)

Finally, we can also split the radio systems into public and private, etc.