DAB Advantages DAB offers many advantages over current broadcast radio systems. The modulation scheme employed is almost impervious to multipath distortion , enabling excellent reception on stationary or mobile receivers, in congested downtown areas or busy traffic. Transmission of digital signals requires considerably less power than analog and as long as the signal can be received and decoded the audio maintains uniform clarity. The bandwidth allocated to each service and hence its quality can be dynamically adjusted at the point of origin. Provision for data transmission in addition to the audio, paves the way for various new value-added applications.
Services generating more revenue are possible without additional investment.
Analog signals require much higher transmit power levels to achieve a useful broadcast radius. Each transmitter is capable of carrying only one service eliminating the possibility of cost sharing. FM radio stations require a 200 kHz minimum, geographically dispersed channel spacing to prevent co-channel interference. Repeating requires allocation of new spectrum for the retransmitted signals. DAB Structure Various steps in the DAB chain process the audio signals prior to transmission.