A Programmable Max-Log-MAP Turbo Decoder Implementation

Table 1

External memory banks. Turbo code block length is 5120.

Memory	Address width	Data width	Size (bits)
Systematic bits, 𝑦^𝑠𝑘	13	7	5120×7  =  35840
Parity bits, 𝑦^𝑝𝑘	14	7	10240×7  =  71680
Extrinsic inf., 𝜆^in/out𝑘	11	10	4×1280×10  =  51200
Interleaver, 𝜋	13	13	5120×13  =  66560
Hard output, sgn(𝐿𝑘)	13	1	5120×1  =  5120
Address queue	7	13	73×13  =  949
Branch metric buffer, 𝛾^𝑘00,𝛾^𝑘01	5	20	4×32×20  =  2560
Fwrd. metric stack, 𝛼𝑘(0,…,7)	5	88	32×88  =  2816