| 摘要 |
A simulcast radio transmission system (250) is disclosed for transmitting message signals (318), originating from a message source (202), to a geographical area (115). The simulcast system includes a controller (204) coupled between the message source (202) and a plurality of remote transmitter sites (208, 210) for exchanging message signals (318) therebetween. Connecting the controller (204) to the plurality of transmitter sites (208, 210) are a plurality of interconnect links (224, 226), each having bounded propagation time delay characteristics. The simulcast system (250) employs a precision reference timing signal (314) for calculating a launch time, which calculation also uses a predetermined propagation time delay for determining the launch time. The controller (204) then combines (508) the message signals (318) with the launch time to establish a message bundle and sends the message bundle to at least one of the plurality of transmitters (208, 210), via at least one of the plurality of interconnect links (224, 226). |
