Patent ID: 7406127

Claim:
A boundary tracking apparatus of an OFDM (Orthogonal Frequency Division Multiplexing) receiver, the OFDM receiver receiving at least one of data blocks corresponding to a plurality of sub-carriers according to a current timing boundary, the plurality of sub-carriers comprising a plurality of pilot sub-carriers and a plurality of data sub-carriers, and the boundary tracking apparatus comprising: a first data acquisition module for receiving at least one of the data blocks according to a first timing boundary, and generating a first decoded data set according to a plurality of specific sub-carriers, wherein the plurality of specific sub-carriers are a part of the plurality of sub-carriers; a second data acquisition module for receiving at least one of the data blocks according to a second timing boundary distinct from the first timing boundary, and generating a second decoded data set according to the plurality of specific sub-carriers; an interference detecting module coupled to the first and the second data acquisition modules for respectively generating a first inter-symbol interference and a second inter-symbol interference according to the first decoded data set and the second decoded data set; and a timing controller for adjusting the current timing boundary according to the first and second inter-symbol interferences.