A Power-Efficient Soft-Output Detector for Spatial-Multiplexing MIMO Communications

Table 5

Comparison of MIMO detector implementations.

	STS-SD [6]	MKSE [17]		SOSD [18]	This work
Fixed throughput	No	Yes	Yes	No	Yes
Technology	0.25 μm	0.13 μm	0.35 μm	0.13 μm	0.18 μm
Max. frequency	71 MHz	100 MHz	200 MHz	198 MHz	120 MHz; (𝑉DD = 1.8 V)
Gate count	56.8 K	97 K	91 K	350 K	100.6 K
Max. throughput (16-QAM)	28.4 Mbps (SNR = 14 dB)	106.6 Mbps	53.3 Mbps	287.9 Mbps	120 Mbps
Complexity efficiency (16-QAM)	—	—	0.59 Mbps/K-gate	0.82 Mbps/K-gate	1.19 Mbps/K-gate
Normalized power efficiency (16-QAM)	—	—	0.20 Mbps/mW	1.88 Mbps/mW	2.53 Mbps/mW; (𝑉DD = 1.08 V); (Freq. = 100 MHz)