Apparatus for transmitting and receiving a signal and method of transmitting and receiving a signal

1. A method for transmitting a broadcasting signal to a receiver, the method comprising:

encoding preamble data, the preamble data including signaling information for signaling data symbols that include Physical Layer Pipe (PLP) data;

time-interleaving (TI) the encoded preamble data according to TI Mode information;

outputting a preamble TI block;

inserting a preamble header in front of the preamble TI block, the preamble header including the TI Mode information;

building a signal frame based on at least one preamble symbol and the data symbols, the at least one preamble symbol located in front of the data symbols and including at least one preamble TI block and the preamble header;

modulating the signal frame by an Orthogonal Frequency Division Multiplexing (OFDM) method; and

transmitting the modulated signal frame,

wherein the TI Mode information indicates a time-interleaving depth for the preamble data, the time-interleaving depth corresponding to a number of the at least one preamble symbol in the signal frame, and

wherein a notch band is located in the signal frame and the at least one preamble symbol includes notch start information and notch width information for the notch band.

2. The method of claim 1 , wherein the time-interleaving depth comprises 4 or 8 OFDM symbols or a minimum number of OFDM symbols necessary for carrying the preamble data.

3. The method of claim 1 , wherein the time-interleaving depth has 1 OFDM symbol when the TI Mode information indicates 1, the 1 OFDM symbol indicating that time-interleaving is not applied for the preamble data.

4. The method of claim 1 , wherein the encoded preamble data are time-interleaved in a row-column twisted manner such that input data are serially written into an interleaving memory in a diagonal direction and serially read out of the interleaving memory row-wise.

5. A transmitter for transmitting a broadcasting signal to a receiver, the transmitter comprising:

an encoder configured to encode preamble data, the preamble data including signaling information for signaling data symbols that include Physical Layer Pipe (PLP) data;

a time-interleaver configured to time-interleave (TI) the encoded preamble data according to TI Mode information and output a preamble TI block;

a header inserting module configured to insert a preamble header in front of the preamble TI block, the preamble header including the TI Mode information;

a frame builder configured to build a signal frame based on at least one preamble symbol and the data symbols, the at least one preamble symbol located in front of the data symbols and including at least one preamble TI block and the preamble header;

a modulator configured to modulate the signal frame by an Orthogonal Frequency Division Multiplexing (OFDM) method; and

a transmission unit configured to transmit the modulated signal frame,

wherein the TI Mode information indicates a time-interleaving depth for the preamble data, the time-interleaving depth corresponding to a number of the at least one preamble symbol in the signal frame, and

wherein a notch band is located in the signal frame and the at least one preamble symbol includes notch start information and notch width information for the notch band.

6. The transmitter of claim 5 , wherein the time-interleaving depth comprises 4 or 8 OFDM symbols or a minimum number of OFDM symbols necessary for carrying the preamble data.

7. The transmitter of claim 5 , wherein the time-interleaving depth has 1 OFDM symbol when the TI Mode information indicates 1, the 1 OFDM symbol indicating that time-interleaving is not applied for the preamble data.

8. The transmitter of claim 5 , wherein the encoded preamble data are time-interleaved in a row-column twisted manner such that input data are serially written into an interleaving memory in a diagonal direction, and serially read out of the interleaving memory row-wise.