Pioneer GEX-P900DAB Service Manual page 55

- Why DAB is More Effective with Multipath Than FM?
Different from FM, DAB systems are designed under the conditions that multipath exists. DAB disperses the portion
that will be distorted by multipath, and corrects such part with error correction.
1) Frequency interleave
Received signal (1.54 MHz)
Distorted portion by multipath, etc.
2) Time interleave
Portion containing error caused by multipath, etc. (digital data)
384ms
Reallocation of frequency after FFT
Disperses distorted carriers by frequency
interleave to change them as random error.
Changes burst error to random error by the time axis.
Corrects error by Viterbi decoding.
GEX-P900DAB
55