Abstract :
In the Integrated Services Digital Broadcasting-Terrestrial Sound Broadcasting (ISDB-T/sub SB/)transmission system, a narrow-band orthogonal frequency division multiplexing with one or three segment(s) is adopted. It is robust against multipath interferences in urban radio wave transmission. In addition, it is capable of mobile reception because of time interleaving. A transmission bandwidth of 432 kHz for one segment is narrow enough in order to allocate channels flexibly, and the "connected transmission" scheme, which allows multiple segment transmission with no guard band, is a highly efficient usage of the frequency resource. The ISDB-T/sub SB/ transmission system is consistent with ISDB-T, hence it enables a common receiver for partial reception of ISDB-T, digital television broadcasting. In this paper, the ISDB-T/sub SB/ transmission system,especially the differences from the ISDB-T transmission system, is introduced,and the current status of the ISBD-TSB digital terrestrial sound broadcasting service is shown.
Keywords :
OFDM modulation; channel allocation; digital audio broadcasting; radio links; 432 kHz; ISDB-T; ISDB-T/sub SB/transmission system; OFDM; channels flexibly; connected transmission scheme; digital radio; digital sound broadcasting; digital television broadcasting; digital terrestrial sound broadcasting; integrated services digital broadcasting; mobile reception; multipath interferences; multiple segment transmission; orthogonal frequency division multiplexing; partial reception; time interleaving; urban radio wave transmission; Communication standards; Data communication; Digital multimedia broadcasting; Intserv networks; Multiplexing; Narrowband; OFDM; Radio broadcasting; Robustness; TV broadcasting; Connected transmission; ISDB-T; In the Integrated Services Digital Broadcasting—Terrestrial Sound Broadcasting (ISDB-T; OFDM; digital radio; digital sound broadcasting; mobile reception;
