A Joint Estimation Method for DOD and DOA of Low Altitude Targets Based on Bistatic Meter Wave MIMO Radar
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.
bistatic MIMO radarmeter wavedirection of departuredirection of arrivalmultipath effect
万方数据
维普
