Transmitting apparatus and mapping method thereof

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 according to 256-quadrature amplitude modulation (QAM);
• 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,
• wherein the demodulator is configured to demodulate the signal based on at least one constellation point among constellation points represented as a table below:
• 0.2975 + 1.0564i
• 0.5862 + 0.9617i
• 0.2909 + 1.0696i
• 0.5796 + 0.9689i
• 0.2953 + 1.3357i
• 0.7488 + 1.2365i
• 0.3004 + 1.5114i
• 0.8151 + 1.3816i
• 0.3004 + 1.0535i
• 0.5847 + 0.9631i
• 0.2931 + 1.0659i
• 0.5825 + 0.9668i
• 0.2953 + 1.3189i
• 0.7466 + 1.2168i
• 0.2960 + 1.4654i
• 0.8297 + 1.3539i
• 1.0637 + 0.2960i
• 0.9617 + 0.5811i
• 1.0732 + 0.2931i
• 0.9682 + 0.5818i
• 1.3619 + 0.2997i
• 1.2249 + 0.7546i
• 1.5427 + 0.3106i
• 1.3969 + 0.8523i
• 1.0615 + 0.2945i
• 0.9631 + 0.5818i
• 1.0710 + 0.2924i
• 0.9675 + 0.5825i
• 1.3255 + 0.2975i
• 1.1979 + 0.7495i
• 1.4560 + 0.3040i
• 1.3269 + 0.8414i
• 0.2493 + 0.5585i
• 0.2960 + 0.5344i
• 0.2450 + 0.5417i
• 0.2873 + 0.5191i
• 0.2049 + 0.3922i
• 0.2173 + 0.3806i
• 0.1990 + 0.3755i
• 0.2107 + 0.3645i
• 0.2493 + 0.5599i
• 0.2975 + 0.5351i
• 0.2450 + 0.5439i
• 0.2887 + 0.5213i
• 0.2056 + 0.3937i
• 0.2187 + 0.3820i
• 0.1998 + 0.3762i
• 0.2122 + 0.3667i
• 0.5607 + 0.2486i
• 0.5381 + 0.2960i
• 0.5439 + 0.2442i
• 0.5220 + 0.2865i
• 0.3908 + 0.2049i
• 0.3813 + 0.2173i
• 0.3740 + 0.1998i
• 0.3653 + 0.2100i
• 0.5643 + 0.2486i
• 0.5410 + 0.2967i
• 0.5475 + 0.2435i
• 0.5257 + 0.2880i
• 0.3937 + 0.2049i
• 0.3850 + 0.2187i
• 0.3762 + 0.1998i
• 0.3689 + 0.2114i