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Table 3 Some bit mapping methods.

From: Full Rate Network Coding via Nesting Modulation Constellations

Nesting Method Bits in low-level constellation Bits for sub-set in container constellation
BPSK in QPSK 0, 1 00, 11
BPSK in 16 QAM 0, 1 0000, 1111
QPSK in 16 QAM 00, 01 0000, 0011
  10, 11 1100, 1111
QPSK in 64 QAM 00, 01 000000, 000110
  10, 11 110000, 110110
16 QAM in 64 QAM 0000, 0001 000000, 000011
  0010, 0011 000101, 000110
  0100, 0101 011000, 011011
  0110, 0111 011101, 011110
  1000, 1001 101000, 101011
  1010, 1011 101101, 101110
  1100, 1101 110000, 110011
  1110, 1111 110101, 110110