Bit interleaver for low-density parity check codeword having length of 64800 and code rate of 5/15 and 64-symbol mapping, and bit interleaving method using same
AssigneeElectronics and Telecommunications Research Institute
InventorsSung-Ik PARK, Sun-Hyoung KWON, Jae-Young LEE, Heung-Mook KIM, Nam-Ho HUR
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Abstract
A bit interleaver includes a first memory, a processor, and a second memory. The first memory stores a low-density parity check (LDPC) codeword having a length of 64800 and a code rate of 5/15. The processor generates an interleaved codeword by interleaving the LDPC codeword on a bit group basis. The size of the bit group corresponds to a parallel factor of the LDPC codeword. The second memory provides the interleaved codeword to a modulator for 64-symbol mapping.
Claims10
A BICM reception device, comprising:
- a demodulator configured to perform demodulation corresponding to 64-symbol mapping;
- a bit deinterleaver configured to perform group-unit deinterleaving on interleaved values, the interleaved values generated after the demodulation;
- and
- a decoder configured to restore information bits by LDPC-decoding deinterleaved values generated based on the group-unit deinterleaving, the deinterleaved values corresponding to a LDPC codeword having a length of 64800 and a code rate of 5/15,
- wherein the group-unit deinterleaving is performed on a group basis, the size of the group corresponding to a parallel factor of the LDPC codeword.
A broadcast signal reception method, comprising:
- performing demodulation corresponding to 64-symbol mapping;
- performing group-unit deinterleaving on interleaved values, the interleaved values generated after the demodulation;
- and
- restoring information bits by LDPC-decoding deinterleaved values generated based on the group-unit deinterleaving, the deinterleaved values corresponding to a LDPC codeword having a length of 64800 and a code rate of 5/15,
- wherein the group-unit deinterleaving is performed on a group basis, the size of the group corresponding to a parallel factor of the LDPC codeword.
Dependencies are inferred from the claim text.