Signal segmentation method and CRC attachment method for reducing undetected error

A transmitter for transmitting a transport block (TB) to a receiver, the transmitter comprising:

• a TB CRC (cyclic redundancy check) attachment module for attaching a first type CRC to the TB;
• a CB (code block) segmentation module operatively connected to the TB CRC attachment module, wherein the CB segmentation module is for segmenting the first type CRC attached-TB into a plurality of code blocks (CBs);
• a CB CRC attachment module operatively connected to the CB segmentation module, wherein the CB CRC attachment module is for attaching each of a plurality of second type CRCs to a corresponding one of the plurality of CBs such that one of the plurality of CBs includes the first type CRC and the second type CRC, and the rest of the plurality of CBs include the second type CRC, wherein the first type CRC and the second type CRC are generated by using different types of CRC generating polynomials,
• wherein both the first type CRC and the second type CRC have a 24-bit length,
• wherein one of the different types of CRC generation polynomials is a first CRC polynomial expressed as:
• g(x)=x24+x23+x6+x5+X+1, and
• wherein another one of the different types of CRC generation polynomials comprises a second CRC polynomial having a same order as the first CRC polynomial, the second CRC polynomial being different from the first CRC polynomial;
• and
• a channel coding module for channel coding the plurality of CBs.