Patent ID: 9577859
Date: 2017-02-21
CPC Classifications: H03M,H04L

Claim:
1. A method of transmitting broadcast signals, the method including: LDPC (Low Density Parity Check) encoding PLP data; bit interleaving the LDPC encoded PLP data; mapping the bit interleaved PLP data onto constellations; time interleaving the mapped PLP data; building at least one signal frame by arranging the time interleaved PLP data; inserting CPs (Continual Pilots) in the built signal frame; modulating data in the built signal frame by OFDM (Orthogonal Frequency Division Multiplexing) method; and transmitting the broadcast signals having the modulated data, wherein the inserted CPs include a first subset and a second subset for 32K FFT size, wherein a location of a CP in the second subset is obtained by applying reversing and shifting operation to a location of a CP in the first subset, and wherein the inserted CPs further include at least one additional CP for 32K FFT size.