Patent ID: 8363763

Claim:
A receiving system, comprising: a signal receiving unit for receiving a broadcast signal including a data group that contains mobile service data and a plurality of known data sequences, wherein the data group is allocated to at least one slot of a sub-frame configured of multiple slots of a transmission frame configured of multiple sub-frames; a known sequence detector for detecting at least one of the plurality of known data sequences from the broadcast signal; a first equalization unit for updating an equalization coefficient by using the detected at least one of the plurality of known data sequences during a known data section in order to primarily channel-equalize at least one of the plurality of known data sequences; a second equalization unit for interpolating or extrapolating the equalization coefficient in order to secondarily channel-equalize the mobile service data when the equalization coefficient converges; a block decoder for performing turbo-decoding on the channel-equalized mobile service data in block units; and an error correction unit for performing error correction decoding on the turbo-decoded mobile service data in order to correct errors generated in the mobile service data, wherein a slot number (j) among the multiple slots to which a data group (i) is transmitted is calculated by using the equation: j =(4 i+k )mod 16, and wherein: k=0 if i is less than 4; k=2 if i is greater than or equal to 4 and less than 8; k=1 if i is greater than or equal to 8 and less than 12; k=3 if i is greater than or equal to 12; i indicates a data group number; i is greater than or equal to 0 and less than or equal to 15; and j is greater than or equal to 0 and less than or equal to 15.