| 摘要 |
A simulcast system capable of synchronizing and maintaining synchronization of a plurality of base sites (1602, 1604, 1606, 1608). The base sites (1602, 1604, 1606, 1608) are capable of transmitting data at substantially the same time. A generator generates time marks (1708) at a predetermined time period (T). A data divider (1812) divides packets to be interposed between at least a pair of time marks. The data packets (1704) and time marks (1708) are transmitted to the base sites. The base sites include base site receivers (1603, 1605, 1607, 1609) for receiving the data packets and time marks and clocks (1611, 1613, 1615, 1617) for measuring the time (T) between each pair of time marks. Base sites controllers (1612, 1614, 1616, 1618) determine the variations in time between any pair of time marks and the predetermined time period (T). Timers adjust the delay time at each of the base sites in response to the variations at each corresponding base site, and delay retransmission of data by a predetermined delay time for each of the base sites to enable the retransmission of data at substantially the same time. |
