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A Dod and Doa Estimation Method for Bistatic MIMO System Based on Target Angle Separation

A target angle and bistatic technology, applied in radio wave direction/deviation determination systems, direction finders using radio waves, etc., can solve the problems of sensitivity to estimation errors, degradation of DOD estimation performance, and limitations on the practicability of existing methods. Achieve the effect of avoiding error interference and accurate angle estimation

Active Publication Date: 2018-02-27
JIANGSU UNIV
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Problems solved by technology

However, these methods do not separately estimate DOD and DOA, but further estimate DOD on the basis of DOA estimates, so DOD estimates are too sensitive to DOA estimation errors
Even with a small estimation error in DOA estimation, the estimation performance of DOD will be severely degraded, which greatly limits the practicability of existing methods.

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  • A Dod and Doa Estimation Method for Bistatic MIMO System Based on Target Angle Separation
  • A Dod and Doa Estimation Method for Bistatic MIMO System Based on Target Angle Separation
  • A Dod and Doa Estimation Method for Bistatic MIMO System Based on Target Angle Separation

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0030] Such as figure 1 As shown, a kind of bistatic MIMO system DOD and DOA estimation method based on target angle separation that the present invention proposes comprises the following steps:

[0031] Step 1, after the radar signal received by the bistatic MIMO system is matched and filtered, it is obtained at t l A data vector containing DOD and DOA information at all times:

[0032] x(t l ) = As(t l )+n(t l ), l=1,2,...,L (1)

[0033] In formula (1): L represents the number of snapshots; s(t l ) means t l A P-dimensional transmit signal vector at time, n(t l ) means t l An MN-dimensional zero-mean white Gaussian noise at any time; A represents an MN×P-dimensional array flow pattern matrix, where M represents the number of array elements in the transmitting array, N represents the number of array elements in the receiving array, an...

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Abstract

The present invention discloses a double-base MIMO system DOD and DOA estimation method based on target angle isolation, belonging to the field of radar signal processing. The method mainly comprises the steps of individually calculating the estimation values of P DOD angles through a series of process transformation according to a received data vector x (t1), orderly marking the estimation values as theat 1, theat 2 to theat r, carrying out transformation processing on the received data vector x(t1) and individually calculating the estimation values of the P DOA angles, orderly making the estimation values of the P DOA angles as phi 1, phi2 to phi p, and finally constructing a space spectral function to carry out spectral peak searching and find matched DOA and DOA according to the estimated DOD values and DOA values. According to the method, the mutual interference between DOD and DOA estimation errors can be effectively avoided, and the estimation performance of DOD and DOA is significantly improved.

Description

technical field [0001] The invention belongs to the field of radar signal processing, and relates to angle estimation of bistatic multiple-input multiple-output radar signals, in particular to a method for estimating wave departure direction and wave arrival direction of a bistatic MIMO system. Background technique [0002] In recent decades, target angle estimation has been an important part of radar signal processing, using bistatic multi-input multi-output (MIMO) system for Direction of Departure (DOD) and direction of arrival (Direction of Arrival, DOA) estimation, its resolution is obviously better than traditional phased array radar. [0003] A large number of effective methods have been proposed for the estimation of DOD and DOA of bistatic MIMO radar signals. For example, in Document 1: Jinli.C, Hong.G.and Weimin.S, Angle estimation using ESPRIT without pairing in MIMO radar, Electron.Lett 44(24)(2008) 1422-1423, a rotation invariant is proposed Space (Estimation o...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S3/14
CPCG01S3/14
Inventor 戴继生李琳汪洋鲍煦邹航
Owner JIANGSU UNIV
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