Low Power Decoding of LDPC Codes

Table 5

Comparison of ATBF decoder implementation with published results.

	ATBF Decoder	[19]	[21]	[22]	[23]	[24]	[20]
Process (nm)	90	180	90	65	160	180	65
Algorithm	ATBF	SBF	Block-interlaced	Layered-SP	SP	Layered-SP	SP
Code size (m, n)	(504,1008)	(813,1057)	(480,660)	(900,1200)	(512,1024)	(1024,2048)	(384,2048)
Clock frequency (MHz)	250	345	142	528	64	125	195
Total area (mm^2)	0.729	7.4	3.1	0.21	52.5	14.3	4.84
Total power (mW)	33.14	1450	—	—	690	787	1359
Average throughput (Gb/s)	25.2	17.37 (max); 0.25 (min)	5.86	0.53	1.0	0.64	92.8
Average iterations	10	1 (max); 40 (min)	16	8	64	10	11
Energy/bit (pJ)	1.3	83.5 (max)	—	—	10.8	123.0	15