No-fuzzy-parameter estimation method of frequency diversity MIMO radar

Abstract

The invention belongs to the field of radar signal processing, and discloses a no-fuzzy-parameter estimation method of a frequency diversity MIMO radar. The method comprises the steps of analyzing a relationship between a frequency increment and an element spacing which influence the traditional frequency diversity MIMO radar to form a distance-angle tight-coupling directional diagram, and designing a reasonable nonlinearly-increasing frequency increment; obtaining angle information of a target by transmitting a pulse of which the frequency increment is 0 and conducting Capon spectrum estimation; then transmitting a pulse of which the frequency increment increases nonlinearly, substituting the estimated angle information into a whole processing process, and combining the Capon spectrum estimation to obtain distance information of the target. According to the no-fuzzy-parameter estimation method of the frequency diversity MIMO radar, not only is the problem of distance-angle tight coupling of a frequency diversity MIMO radar transmitting directional diagram solved, but also the angle and no-fuzzy distance estimation of the target are achieved, and precise locating of the target is further achieved.

Description

technical field

[0001] The invention belongs to the technical field of radar signal processing, and in particular relates to a method for estimating an unambiguous parameter of a frequency diversity MIMO radar, which can be used for decoupling and decoupling distance and angle of a pattern of a frequency diversity MIMO radar to obtain unambiguous target parameter estimation. Background technique

[0002] Frequency diversity array is a more flexible new system array radar technology proposed in the past ten years. Existing literatures on adaptive radar and cognitive radar often use single antenna or phased array as receiver.

[0003] However, the receiving beamforming method based on phased array can only provide the azimuth information of the target, and cannot estimate the distance information of the target. The frequency diversity array radar introduces a frequency increment between each antenna element, obtains the range-angle dependent waveform, and introduces an additi...

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