TY - JOUR
T1 - Transmit Subaperturing for MIMO Radars with Nested Arrays
AU - Mao, Linlin
AU - Li, Hongbin
AU - Zhang, Qunfei
N1 - Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2017/5/1
Y1 - 2017/5/1
N2 - We consider a multiple-input multiple-output (MIMO) radar equipped with a colocated nested array for both transmit and receive. A novel transmit subaperturing (TS) approach that decomposes the nested array into unequal subarrays is proposed to take the advantage of the degrees of freedom (DOF) provided by the nested array but without resorting to spatial smoothing. Phased-array and the conventional MIMO with omni-directional transmission (omni-MIMO) are also extended to the nested array scenario, which utilize spatial smoothing to improve their DOF. Simulation results show that with sufficient training data, the omni-MIMO with nested array achieves the highest output signal-to-interference-plus-noise ratio (SINR), while the TS-MIMO scheme outperforms the other methods when training is limited when the radar operates in a non-homogeneous environment.
AB - We consider a multiple-input multiple-output (MIMO) radar equipped with a colocated nested array for both transmit and receive. A novel transmit subaperturing (TS) approach that decomposes the nested array into unequal subarrays is proposed to take the advantage of the degrees of freedom (DOF) provided by the nested array but without resorting to spatial smoothing. Phased-array and the conventional MIMO with omni-directional transmission (omni-MIMO) are also extended to the nested array scenario, which utilize spatial smoothing to improve their DOF. Simulation results show that with sufficient training data, the omni-MIMO with nested array achieves the highest output signal-to-interference-plus-noise ratio (SINR), while the TS-MIMO scheme outperforms the other methods when training is limited when the radar operates in a non-homogeneous environment.
KW - Degrees of freedom (DOF)
KW - Nested array (NA)
KW - Subaperturing
KW - Transmit beamforming
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U2 - 10.1016/j.sigpro.2016.12.016
DO - 10.1016/j.sigpro.2016.12.016
M3 - Article
AN - SCOPUS:85007478132
SN - 0165-1684
VL - 134
SP - 244
EP - 248
JO - Signal Processing
JF - Signal Processing
ER -