Joint DOD and DOA Estimation of Bistatic MIMO Radar for Coprime Array Based on Array Elements Interpolation

Table 1

Number of elements for augmented CPA.

	M1	N1	M	Hs	Hf		DOF
N1 = M1 + 1	2	3	6	2	1	23	23
	3	4	9	4	2	47	47
	4	5	12	6	3	79	79
	…	…	…	…	…	…	…
N1 = M1 + 2	3	5	10	4	3	59	59
	5	7	16	8	4	139	139
	7	9	22	12	6	251	251
	…	…	…	…	…	…	…
N1 = M1 + 3	4	7	14	6	3	111	111
	5	8	17	8	4	159	159
	7	10	23	12	6	279	279
	…	…	…	…	…	…	…
N1 = M1 + L	M1	N1	2M1 + N1 − 1	2(M1 − 1)	M1 − 1	4M1N1 − 1	4M1N1 − 1

M denotes the number of array sensors, H_s denotes the number of central virtual holes located next to the center point, H_f denotes the number of interpolated sensors, denotes the number of continuous virtual sensors, and DOF denotes the DOF after interpolating the holes.