Fast resynchronization for reception in time slicing

摘要

A method and an apparatus for achieving fast resynchronization of received signals in a time slice in DVB-T/H systems. When the clock drift is low, the location of the symbol window can be decided based on a previous time slice. When the clock drift is high and when there are large delay spreads, the location of the symbol window can be decided based on the detected scattered pilot positions. The placement of the symbol window can further be enhanced through processing of the received TPS bits.

主权项

1. A method of fast resynchronization comprising:
receiving into a receiver a plurality of multi-carrier frames transmitted in time slices, each of the plurality of multi-carrier frames including a plurality of OFDM symbols; obtaining first TPS bits from a first plurality of frames; placing an initial window to a fifth frame for a coarse fractional frequency offset estimation and an integer frequency offset estimation; extracting second TPS bits from the fifth frame; correlating the extracted second TPS bits with the obtained first TPS bits; and calculating a symbol number based on the correlation of the TPS bits.