Back to results
US 11,424,858 B2Granted
Transmitting apparatus and modulation method thereof
AssigneeSamsung Electronics Co., Ltd.
InventorsSe-ho Myung, Belkacem Mouhouche, Daniel Ansorregui Lobete, Kyung-joong Kim, Hong-sil Jeong
Life of this patent
Estimating the term…
Abstract
A transmitting apparatus is disclosed. The transmitting apparatus includes an encoder to perform channel encoding with respect to bits and generate a codeword, an interleaver to interleave the codeword, and a modulator to map the interleaved codeword onto a non-uniform constellation according to a modulation scheme, and the constellation may include constellation points defined based on various tables according to the modulation scheme.
Claims4
A receiving apparatus comprising:
- a receiver configured to receive a signal from a transmitting apparatus;
- a demodulator configured to demodulate the signal to generate values;
- a deinterleaver configured to deinterleave the values;
- and
- a decoder configured to decode the deinterleaved values based on a low density parity check (LDPC) code, a code rate of the LDPC code being 3/15,
- wherein the signal is demodulated based on 64-quadrature amplitude modulation (QAM), position vectors w, in which w comprises w0, w1, . . . , and w15 and a quadrant of the position vector wi in which i is any one of 0 to 15, and
- wherein the position vectors w are represented in a table as below:
- w0
- 0.5472 + 1.1591i
- w1
- 0.5473 + 1.1573i
- w2
- 0.5467 + 1.1599i
- w3
- 0.5479 + 1.1585i
- w4
- 1.1578 + 0.5478i
- w5
- 1.1576 + 0.5475i
- w6
- 1.1591 + 0.5475i
- w7
- 1.1591 + 0.5475i
- w8
- 0.3163 + 0.5072i
- w9
- 0.3163 + 0.5072i
- w10
- 0.3163 + 0.5072i
- w11
- 0.3163 + 0.5072i
- w12
- 0.5087 + 0.3163i
- w13
- 0.5087 + 0.3163i
- w14
- 0.5087 + 0.3163i
- w15
- 0.5087 + 0.3163i.
36 more elements
A transmitting apparatus comprising:
- an interleaver configured to interleave a codeword;
- and
- a mapper configured to demultiplex bits of the interleaved codeword to generate cells, and map the cells to 2-dimensional (2D) non-uniform constellation points using 64-quadrature amplitude modulation (QAM) and position vectors w, in which w comprises w0, w1, . . . , and w15,
- wherein the codeword comprises input bits and parity bits which are generated by encoding the input bits based on a low density parity check (LDPC) code, a code rate of the LDPC code being 3/15,
- wherein the cells are mapped to the constellation points by determining a position vector wi, in which i is any one of 0 to 15, corresponding to a cell from among the position vectors w, and determining a quadrant of the position vector wi, and
- wherein the position vectors w are represented in a table as below:
- w0
- 0.5472 + 1.1591i
- w1
- 0.5473 + 1.1573i
- w2
- 0.5467 + 1.1599i
- w3
- 0.5479 + 1.1585i
- w4
- 1.1578 + 0.5478i
- w5
- 1.1576 + 0.5475i
- w6
- 1.1591 + 0.5475i
- w7
- 1.1591 + 0.5475i
- w8
- 0.3163 + 0.5072i
- w9
- 0.3163 + 0.5072i
- w10
- 0.3163 + 0.5072i
- w11
- 0.3163 + 0.5072i
- w12
- 0.5087 + 0.3163i
- w13
- 0.5087 + 0.3163i
- w14
- 0.5087 + 0.3163i
- w15
- 0.5087 + 0.3163i.
35 more elements
Dependencies are inferred from the claim text.