| 摘要 |
The invention relates to a method for frequency tracking in a digital broadcasting system comprising a plurality of broadcasting transmitter stations (10) for transmitting a service to a mobile broadcast receiver (30). The method comprises the steps of: transmitting, from a certain broadcasting transmitter station (10), said service using a first central frequency (fC1); transmitting, from said certain broadcasting transmitter station (10), information identifying said certain transmitter; transmitting, together with said service, a list comprising transmitter identification codes and associated alternative frequencies (fC2, fC3 fC4, fC5, fC6, fC7) on which said service is transmitted. The method further comprises transmitting, in a first directional sector from said certain broadcasting transmitter station, a first transmitter identification code (A); and transmitting, in a second directional sector from said certain broadcasting transmitter station, a second transmitter identification code (B), said second transmitter identification code (B) differing from said first transmitter identification code (A); wherein said list associates said first transmitter identification code (A) with a first set of alternative central frequencies (fC2; fC3; fC7), and said list associates said second transmitter identification code (B) with a second set of alternative central frequencies (fC2; fC3; fC4), said second set of alternative central frequencies (fC2; fC3; fC4) differing from said first set of alternative central frequencies (fC2; fC3; fC7). |
