Transmitter, receiver, and signal processing method thereof

A signal generation and transmitting method comprising:

• segmenting input bits into a plurality of segmented blocks based on a segmentation value, if a size of the input bits is greater than the segmentation value;
• filling a bit space of information bits with bits and one or more zero padding bits, if a size of the bits is less a size of the information bits, the bits comprising bits of a segmented block from among the plurality of segmented blocks;
• encoding the information bits to generate parity bits based on a code;
• interleaving the generated parity bits;
• puncturing one or more parity bits from among the interleaved parity bits,
• removing the one or more zero padding bits from the information bits;
• mapping the bits and remaining parity bits after the puncturing to constellation points;
• and
• transmitting a signal which is generated based on the constellation points,
• wherein the segmentation value is based on the code, a zero padding parameter and a puncturing parameter.