Beam Split Algorithm for Height Measurement With Meter-Wave MIMO Radar

In order to improve the feasibility of low-elevation height measurement for meter-wave multiple-input multiple-output (MIMO) radar, a virtual sub-array-level beam splitting algorithm is proposed. The can solve coherence problems caused by low-angle multipath reflection, target reflection wave and direct coupling, quickly measure low elevation angle on flat ground, then obtain through geometric relationship. First, establish an error graph in advance according radar frequency, antenna coefficient; combine nine channels three-element MIMO into three channels; use phase difference between adjacent perform encoding confirm range; calculated amplitude value compared with curve diagram established angle; finally, data obtained signal model formula under complex terrain are finally derived. simulation verifies accuracy superiority proposed ground undulating ground.