A Comparison between Multiple-Input Multiple-Output and Multiple-Input Single-Output Radar Configurations for Through-the-Wall Imaging Applications

Table 2

Comparison between the proposed radar system and those existing in the literature.

	Type of radar	Frequency range	Average power	Antennas	Algorithms	Max range through wall
Liu and Liu [10]	SISO	0.3–1.3 GHz	10 dBm	1 TX and 1 RX bow-tie	IFT	1.5 m
Mercuri et al. [11]	SISO	7.3–8.3 GHz	0 dBm	1 TX and 1 RX rampart-line	Beam-steering	—
Yan et al. [12]	SISO	0.85–9.55 GHz	1 dBm	1 TX and 1 RX Vivaldi	Variational mode decomposition	2 m
Liu et al. [13]	MISO	0.5–2.5 GHz	3 dBm	1 TX and 8 RX cavity-backed bow-tie	Beamforming	5.5 m
Akiyama et al. [14]	MISO	0.1–1.2 GHz	20 dBm	1 TX and 4 RX spiral	FT	5 m
Salmi and Molisch [15]	MIMO	2–8 GHz	0 dBm	1 TX and 1 RX movable planar monopole	MPC	5 m
Liang et al. [16]	MIMO	0.04–4.4 GHz	10 dBm	2 TX–4 RX spiral	CFAR	5 m
Quinquis et al. [17]	MIMO	11.65–18 GHz	Not available	1 TX and 1 RX movable horn	IFT, MUSIC, ESPRIT	3 m
Yoon and Amin [18]	MIMO	1–3 GHz	10 dBm	2 TX and 1 RX movable horn	Compressive sensing	5 m
Hu et al. [19]	MIMO	0.5–2.5 GHz	1 dBm	8 TX and 8 RX Vivaldi	Back-projection	2 m
This work	MIMO	1–3 GHz	20 dBm	4 TX and 4 RX Vivaldi	FT, MUSIC, FT-MUSIC	≅5 m
	MISO	1–3 GHz	20 dBm	1 TX and 10 RX Vivaldi	FT, MUSIC, FT-MUSIC	≅5 m

FT = Fourier transform, IFT = inverse Fourier transform, MUSIC = multiple signal classification, MPC = multipath components, CFAR=constant false alarm rate, ESPRIT = rotational invariance technique.