Centralized mimo radar waveform optimization method based on cylindrical array

Abstract

The invention discloses a cylindrical-array-based centralized MIMO (multiple input multiple output) radar waveform optimization method, which mainly comprises the following steps: determining a cylindrical-array-based centralized MIMO radar, the cylindrical-array-based centralized MIMO radar integrating sending and receiving and comprising N circles of array elements and each circle of array elements comprising Nt array elements, and obtaining phase difference column vectors of the N circles of array elements relative to the antenna phase center of the cylindrical-array-based centralized MIMO radar and electric field intensity column vectors of the N circles of array elements respectively; further calculating guide vectors of the N circles of array elements; calculating a receiving beamforming weight of the centralized MIMO radar, and further calculating an optimal receiving beamforming weight of the centralized MIMO radar; recording expected sending directional diagrams, then arranging the expected sending directional diagrams to obtain column vectors of the expected sending directional diagrams according to an arrangement sequence of the phase difference column vectors, calculating a designing criterion of a waveform matrix S of the N circles of array elements of the centralized MIMO radar, and further calculating a final waveform matrix of the centralized MIMO radar.

Description

technical field [0001] The invention belongs to the technical field of radar waveform acquisition, in particular to a centralized MIMO radar waveform optimization method based on a cylindrical array, which is suitable for reducing the autocorrelation sidelobe level of signals in the same direction and the cross-correlation level in different directions, and approaching the desired Launch pattern. Background technique [0002] A conformal array antenna usually refers to a special array manifold whose array surface matches the shape of the carrier platform. Keep consistent, so that the beam scanning range of the conformal array antenna extends from the usual ±60° solid angle of the planar array antenna to half space, or even full space coverage, which significantly improves the field of view of the radar; in addition, the conformal array antenna can Fully conformal with high-speed flying carriers, such as fighter jets, missiles, satellites, etc., without damaging the shape de...

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Problems solved by technology

[0003] However, the current research on conformal arrays is mainly research on conformal phased array radars, and the research contents mainly include conformal array array elements, adaptive beamforming, and conformal array airspace signal processing. There are fewer degrees of freedom at the radar transmitter, and the effect of generating a main lobe pattern is usually better, but the effect of generating multiple beams at the same time is usually poor

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