Transmitter and repetition method thereof
AssigneeSamsung Electronics Co., Ltd.
InventorsSe-ho Myung, Kyung-joong Kim, Hong-sil Jeong
Life of this patent
Estimating the term…
Abstract
A transmitter is provided. The transmitter includes: a low density parity check (LDPC) encoder configured to encode input bits to generate an LDPC codeword including the input bits and parity bits; a repeater configured to select at least a part of bits constituting the LDPC codeword and add the selected bits after the input bits; and a puncturer configured to puncture at least a part of the parity bits.
Claims6
A receiving method of a receiving apparatus which is operable in a mode among a plurality of modes, the receiving method comprising:
- receiving a signal from a transmitting apparatus;
- demodulating the signal to generate values;
- if the mode is a predetermined mode among the plurality of modes, adding first values of the generated values to second values of the generated values;
- and
- decoding the added values and remaining values of the generated values based on a low density parity check (LDPC) code,
- wherein the signal is generated by encoding information bits comprising input bits based on the LDPC code to generate parity bits, selecting one or more parity bits of the generated parity bits and appending the selected parity bits between the information bits and the generated parity bits,
- wherein a number of the parity bits to be selected is determined based on a following equation:
- Nrepeat=2×└C×Nouter┘+D,
- where Nrepeat represents the number of the parity bits to be selected, Nouter represents a number of the input bits and C and D are predetermined values respectively,
- wherein the first values correspond to two or more parity bits among the appended parity bits, and
- wherein the second values correspond to two or more parity bits among the selected parity bits.
A transmitting method of a transmitting apparatus which is operable based on a mode among a plurality of modes, the transmitting method comprising:
- encoding information bits comprising input bits to generate parity bits based on a low density parity check (LDPC) code, a code length of the LDPC code being 16200 bits;
- if the mode is a predetermined mode among the plurality of modes, performing a repetition by determining a number of repetition bits based on a number of the input bits, selecting one or more parity bits of the generated parity bits based on the determined number and a number of the generated parity bits and appending the selected bits between the information bits and the generated parity bits;
- puncturing one or more parity bits of the generated parity bits;
- if the mode is the predetermined mode, mapping the input bits, the appended parity bits and remaining parity bits of the generated parity bits after the puncturing to constellation points for a quadrature phase shift keying (QPSK);
- and
- transmitting a signal which is generated based on the constellation points.
Dependencies are inferred from the claim text.