A novel code-based iterative PIC scheme for multirate CI/MC-CDMA communication

EURASIP Journal on Wireless Communications and Networking

Table 1 Complexity per iteration $(C_{P I C})$ for four PIC schemes

PIC Scheme	Complexity
Conventional PIC	N[(K₁ + K₂ + 1)N + 1](K₁ + K₂)
Block-PIC	N[(log(K₁ + K₂) - 1)N + 1] log(K₁ + K₂) +N[(K₁ + K₂ - log(K₁ + K₂) - 1)N + 1](K₁ + K₂ - log(K₁ + K₂))
Sub-PIC	$[N (K_{1} + K_{2}) + 1] (\frac{K_{1}}{4} + K_{2}) + [N (K_{1} + 1) + 1] \frac{3 K_{1}}{4}$
Code-PIC	$[N (K_{1} + K_{2}) + 1] \frac{K_{1}}{4} + [N (K_{1} + 1) + 1] \frac{3 K_{1}}{4} + [N (K_{1} + \frac{K_{2}}{4} - 1) + 1] K_{2}$