Patent ID: 7751502

Claim:
A sync signal detection apparatus usable with a VSB receiver, the apparatus comprising: a partial correlation unit to calculate a plurality of partial correlation signals between a plurality of portions of a received signal and a plurality of corresponding portions of a training sequence, the partial correlation unit having: a first plurality of partial correlators to receive an “I” signal of the plurality of portions of the received signal and the corresponding plurality of portions of the training sequence and to produce a plurality of first portions of the correlation signal; and a second plurality of partial correlators to receive a “Q” signal of the plurality of portions of the received signal and the corresponding plurality of portions of the training sequence and to produce a plurality of second portions of the correlation signal; and an adding unit to add the plurality of partial correlation signals to determine a correlation signal, the adding unit having a plurality of adders each to receive one of the first portions of the correlation signal and one of the second portions of the correlation signal and to add the first and second portions of the correlation signal together with sums of previous first and second portions of the correlation signal output by previous adders such that a last adder outputs the correlation signal as a sum of all the first and second portions of the correlation signal.