MIMO (Multiple-input Multiple-output) radar angle estimation algorithm based on tensor subspace and rotation invariant

A rotation invariant, angle estimation technology, applied in the field of MIMO radar angle estimation algorithms, can solve the problems affecting the angle estimation accuracy, low computational complexity, inaccurate GPE estimation, etc., and achieve high angle estimation accuracy and low computational complexity. Effect
CN107064892AActive Publication Date: 2017-08-18YANGTZE UNIVERSITY
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
YANGTZE UNIVERSITY
Publication Date
2017-08-18

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Abstract

The invention discloses a MIMO (Multiple-input Multiple-output) radar angle estimation algorithm based on tensor subspace and rotation invariant. Through building a three-order tensor model for receiving data, a higher-order covariance tensor model for tensor data is further built, and the internal correlation structure of array signals is thoroughly exploited; HOSVD (Higher Order Singular Value Decomposition) is then carried out on the tensor data, new signal subspace is built, and high-precision noise subspace is thus acquired; and finally, by using the rotation invariant of array data, a DOD (Direction of Departure) and a DOA (Direction of Arrival) which are paired are acquired through a constrained optimization method and a lagrangian multiplier method, and further pairing calculation is not needed. According to the MIMO radar angle estimation algorithm of the invention, by using the internal correlation structure of the received signals, the angle estimation precision is higher, the target DOD and the target DOA which are more accurate can be acquired, a more reasonable reference is provided for further processing on a detected target, spectral peak search is not needed, and the computation complexity is low.
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Description

technical field

[0001] The invention relates to a radar signal processing technology, in particular to a MIMO radar angle estimation algorithm based on tensor quantum space and rotation invariance. Background technique

[0002] Multiple-input Multiple-output (MIMO) radar is a new radar system, which uses multiple array elements to transmit and receive signals synchronously. Compared with traditional phased array radar systems, MIMO radar has potential advantages in terms of resolution, anti-fading, identifiability, and noise suppression. MIMO radars can be divided into two types according to the position distribution of the transmitting and receiving elements of MIMO radars: statistical MIMO radars and co-located MIMO radars. Among them, the statistical MIMO radar sampling distributed transceiver array configuration can effectively suppress the scintillation effect of the target; the transmitting array element and receiving array element in the co-located MIMO radar are oft...

Claims

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