Embedded Transmission of Multi-Service Over DTMB System

To efficiently support the transmission of terrestrial and mobile services within the same spectrum over the Digital Television Terrestrial Multimedia Broadcasting (DTMB) system, a flexible multi-service datacasting scheme in a backward compatible manner is proposed. Using this scheme, the conventional DTMB receivers work as usual by simply selecting the specific terrestrial DTV programs on the basis of the package identifier (PID) checking, while only the desired mobile service data are processed by the mobile receivers via the designed control signals. Both theoretical analysis and computer simulation show that, at acceptable spectral efficiency penalty, the proposed method not only supports the embedded transmission of multi-services with no reception performance degradation for the traditional terrestrial broadcasting service, but also flexibly provides much better mobile reception performance.

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