Direction estimation method of MIMO-UKF-MUSIC (Multiple Input Multiple Output-Unscented Kalman Filter-Multiple Signal Classification) target

Abstract

The invention relates to a direction estimation method of an MIMO-UKF-MUSIC (Multiple Input Multiple Output-Unscented Kalman Filter-Multiple Signal Classification) target. In the actual direction finding process, according to an MUSIC spatial spectrum estimation algorithm, fluctuating target signal-to-noise ratio and time-varying strong interference commonly occur, radar signals of a plurality of targets of an MIMO sky wave radar are coherent signals, the disadvantageous conditions need to be deeply analyzed, and the estimation performance of an MUSIC algorithm under non-ideal conditions is improved. The direction estimation method comprises the following steps of 1, acquiring a plurality of groups of DOA (Direction of Arrival) estimation values and a plurality of groups of DOD (Direction of Departure) estimation values in a plurality of sensor arrays under an MIMO system; 2, filtering the DOA estimation values and the DOD estimation values respectively to obtain a plurality of groups of DOA estimation filtering values and a plurality of groups of DOD estimation filtering values, and averaging the plurality of groups of DOA estimation filtering values and the plurality of groups of DOD estimation filtering values to obtain final DOA estimation and final DOD estimation. The direction estimation method of the MIMO-UKF-MUSIC target is applicable to the field of array signal processing.

Description

technical field

[0001] The invention relates to a MIMO-UKF-MUSIC target direction estimation method, which belongs to the field of array signal processing. Background technique

[0002] MIMO (Multiple input muitiple output) radar system is a new concept in the field of radar, which has shown great potential and advantages. With its multiple input and multiple output characteristics, MIMO radar has unique advantages in increasing space sampling, anti-stealth, anti-electronic countermeasures and jamming. In order to ensure its own survivability, master the control of electromagnetic power, and achieve the purpose of effective monitoring of targets, the radar system needs to have good azimuth resolution and be able to quickly and accurately identify and locate the target. Therefore, good target orientation estimation performance is very important for MIMO radar system to detect target information.

[0003] At present, the theory of spatial spectrum estimation algorithm repres...

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