Enabling VLSI Processing Blocks for MIMO-OFDM Communications

Table 3

Comparison results for SD building block.

SD	Our		[26]	[27]
Antennas	2×2 per two channel uses		4×4	4×4
Modulation	4,16,64-QAM	16-QAM	16-QAM	16-QAM
Detector	Depth-first sphere		Depth-first sphere	𝐾-best sphere
BER perf.	ML		ML	Quasi-ML
Tech. μm	0.13	0.25	0.25	0.35
Core area GE	61 k +preproc.	56 k +preproc.	117 k +preproc.	91 k +preproc.
Max. clock	213 MHz	109 MHz	51 MHz	100 MHz
Throughput @ SNR = 20 dB	148.6 Mbps 16-QAM	83 Mbps	73 Mbps	52 Mbps