Table 2.

The proposed scheme index demodulator ($\tilde{M}$ = 4).

Null Carrier Index	Corresponding	Corresponding
(Extracted from LLR Subgroup ($\tilde{\mathit{i}}$))	Decimal Value ($\tilde{\mathit{z}}$)	Binary Sequence (${\tilde{\mathit{p}}}_0$)
1	$\tilde{i}-1=0$	${\tilde{p}}_0=\left\{00\right\}$
2	$\tilde{i}-1=1$	${\tilde{p}}_0=\left\{01\right\}$
3	$\tilde{i}-1=2$	${\tilde{p}}_0=\left\{10\right\}$
4	$\tilde{i}-1=3$	${\tilde{p}}_0=\left\{11\right\}$