Broadcast signal transmission device and broadcast signal transmission method which use broadcast signal frame for signaling reduced carrier coefficient

A method for transmitting a broadcast signal, comprising:

• generating one or more subframes;
• generating a preamble corresponding to the one or more subframes;
• and
• generating a bootstrap for signaling a system bandwidth field, corresponding to a system bandwidth for a post-bootstrap, and a baseband sampling rate coefficient,
• wherein:
• the preamble includes L1 signaling data, and the L1 signaling data includes a reduced carrier coefficient.

An apparatus for receiving a broadcast signal, comprising:

• a bootstrap restoration unit for restoring a bootstrap for signaling a system bandwidth field, corresponding to a system bandwidth for a post-bootstrap, and a baseband sampling rate coefficient;
• a preamble restoration unit for restoring a preamble located immediately following the bootstrap in a broadcast signal frame;
• and
• a payload restoration unit for restoring one or more subframes located immediately following the preamble in the broadcast signal frame,
• wherein:
• the preamble includes L1 signaling data, and the L1 signaling data includes a reduced carrier coefficient.