| 摘要 |
An apparatus comprises a sequence generator configured to generate a reference sequence for scrambling scattered pilots, edge pilots and/or frame closing pilots in data symbols, such as Orthogonal Frequency Division Multiplexing (OFDM) symbols in a data stream. The sequence is based, at least in part, on a symbol number of the data symbol in which the pilots are to be included. A receiving apparatus may then identify a symbol having a particular symbol number in a received data stream based on the scrambling sequence. Where the data stream carries multiple services in bursts or time slices, the receiving apparatus may remain in sleep mode between the bursts associated with a desired service. The method permits a receiver that has "woken up" to identify a received symbol having a particular symbol number and synchronize its symbol index. |
