A transmitting apparatus, comprising: an encoder configured to encode input bits to generate parity bits according to a code rate of 3/15; an interleaver configured to interleave a codeword comprising the input bits and the parity bits; and a modulator configured to map bits of the interleaved codeword onto at least one constellation point, wherein the modulator is configured to map the bits of the interleaved codeword onto the at least one constellation point among constellation points represented as a table below for 64-quadrature amplitude modulation, QAM,: 0.5472 + 1.1591i 0.5473 + 1.1573i 0.5467 + 1.1599i 0.5479 + 1.1585i 1.1578 + 0.5478i 1.1576 + 0.5475i 1.1591 + 0.5475i 1.1591 + 0.5475i 0.3163 + 0.5072i 0.3163 + 0.5072i 0.3163 + 0.5072i 0.3163 + 0.5072i 0.5087 + 0.3163i 0.5087 + 0.3163i 0.5087 + 0.3163i 0.5087 + 0.3163i -0.5472 + 1.1591i -0.5473 + 1.1573i -0.5467 + 1.1599i -0.5479 + 1.1585i -1.1578 + 0.5478i -1.1576 + 0.5475i -1.1591 + 0.5475i -1.1591 + 0.5475i -0.3163 + 0.5072i -0.3163 + 0.5072i -0.3163 + 0.5072i -0.3163 + 0.5072i -0.5087 + 0.3163i -0.5087 + 0.3163i -0.5087 + 0.3163i -0.5087 + 0.3163i -0.5472 - 1.1591i -0.5473 - 1.1573i -0.5467 - 1.1599i -0.5479 - 1.1585i -1.1578 - 0.5478i -1.1576 - 0.5475i -1.1591 - 0.5475i -1.1591 - 0.5475i -0.3163 - 0.5072i -0.3163 - 0.5072i -0.3163 - 0.5072i -0.3163 - 0.5072i -0.5087 - 0.3163i -0.5087 - 0.3163i -0.5087 - 0.3163i -0.5087 - 0.3163i 0.5472 - 1.1591i 0.5473 - 1.1573i 0.5467 - 1.1599i 0.5479 - 1.1585i 1.1578 - 0.5478i 1.1576 - 0.5475i 1.1591 - 0.5475i 1.1591 - 0.5475i 0.3163 - 0.5072i 0.3163 - 0.5072i 0.3163 - 0.5072i 0.3163 - 0.5072i 0.5087 - 0.3163i 0.5087 - 0.3163i 0.5087 - 0.3163i 0.5087 - 0.3163i an encoder configured to encode input bits to generate parity bits according to a code rate of 3/15; an interleaver configured to interleave a codeword comprising the input bits and the parity bits; and a modulator configured to map bits of the interleaved codeword onto at least one constellation point, wherein the modulator is configured to map the bits of the interleaved codeword onto the at least one constellation point among constellation points represented as a table below for 64-quadrature amplitude modulation, QAM,: 0.5472 + 1.1591i 0.5473 + 1.1573i 0.5467 + 1.1599i 0.5479 + 1.1585i 1.1578 + 0.5478i 1.1576 + 0.5475i 1.1591 + 0.5475i 1.1591 + 0.5475i 0.3163 + 0.5072i 0.3163 + 0.5072i 0.3163 + 0.5072i 0.3163 + 0.5072i 0.5087 + 0.3163i 0.5087 + 0.3163i 0.5087 + 0.3163i 0.5087 + 0.3163i -0.5472 + 1.1591i -0.5473 + 1.1573i -0.5467 + 1.1599i -0.5479 + 1.1585i -1.1578 + 0.5478i -1.1576 + 0.5475i -1.1591 + 0.5475i -1.1591 + 0.5475i -0.3163 + 0.5072i -0.3163 + 0.5072i -0.3163 + 0.5072i -0.3163 + 0.5072i -0.5087 + 0.3163i -0.5087 + 0.3163i -0.5087 + 0.3163i -0.5087 + 0.3163i -0.5472 - 1.1591i -0.5473 - 1.1573i -0.5467 - 1.1599i -0.5479 - 1.1585i -1.1578 - 0.5478i -1.1576 - 0.5475i -1.1591 - 0.5475i -1.1591 - 0.5475i -0.3163 - 0.5072i -0.3163 - 0.5072i -0.3163 - 0.5072i -0.3163 - 0.5072i -0.5087 - 0.3163i -0.5087 - 0.3163i -0.5087 - 0.3163i -0.5087 - 0.3163i 0.5472 - 1.1591i 0.5473 - 1.1573i 0.5467 - 1.1599i 0.5479 - 1.1585i 1.1578 - 0.5478i 1.1576 - 0.5475i 1.1591 - 0.5475i 1.1591 - 0.5475i 0.3163 - 0.5072i 0.3163 - 0.5072i 0.3163 - 0.5072i 0.3163 - 0.5072i 0.5087 - 0.3163i 0.5087 - 0.3163i 0.5087 - 0.3163i 0.5087 - 0.3163i