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Table 3 Distances to capacity for TPCs and iVTCs

From: Irregular Vector Turbo Codes with low complexity

Code

Modulation

D(TPC) (dB)

D(iVTC) (dB)

iVTC code rate

(63, 57)

BPSK

1.30

1.58

0.77

QPSK

1.34

1.42

0.77

16QAM

1.71

1.99

0.77

64QAM

3.64

3.66

0.77

(127,120 )

BPSK

0.61

0.49

0.90

0.60

0.88

1.46

0.85

QPSK

2.02

2.00

0.90

1.93

0.88

1.74

0.85

16QAM

1.35

1.41

0.90

1.05

0.88

1.30

0.85

64QAM

2.25

1.82

0.90

1.58

0.88

1.78

0.85

(255, 247)

BPSK

0.28

0.53

0.93

QPSK

4.26

3.53

0.93

16QAM

2.70

2.41

0.93

64QAM

3.47

2.64

0.93

  1. aThe (63, 57), (127, 120) and (255, 247)TPCs have fixed code rates of 0.82, 0.89 and 0.94, respectively. D(TPC), D(iVTC) in the table represent, the distance to capacity for the TPC and the iVTC in dB, respectively