For the low altitude target elevation direction finding scenario of bistatic multiple input multiple output(MIMO)radar,due to multipath effects,the transmitting and receiving steering vectors lose or-thogonality with the noise subspace due to coupling,resulting in the unavailability of subspace class algo-rithms mainly based on multiple signal classification(MUSIC)in this scenario,However,subspace algo-rithms based on spatial smoothing preprocessing suffer from low accuracy in angle estimation due to array aperture loss.To solve the above problems,this paper establishes a bistatic meter wave MIMO radar sin-gle target and incoherent multi target mirror reflection signal model.Based on the mathematical transfor-mation and analysis of the signal model,a steering vector matrix that is still orthogonal to the noise sub-space is discovered,then,a new guidance vector matrix combined with generalized MUSIC and maximum likelihood algorithm was used to propose a joint estimation method for the elevation direction of departure and arrival of low altitude targets in a bistatic meter wave MIMO radar.Finally,simulation experiments verified the effectiveness of the proposed method and the superiority of the elevation direction finding per-formance.
关键词
双基地MIMO雷达/米波/波离方向/波达方向/多径效应
Key words
bistatic MIMO radar/meter wave/direction of departure/direction of arrival/multipath effect
维普
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