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CTLS-based external radiation source radar net bistatic distance error registration method

A technology of external radiation source radar and external radiation source, which is applied in the field of dual-base distance error registration of external radiation source radar network based on constrained total least squares, can solve the problem of ignoring noise structure and correlation, and failing to achieve the minimum system deviation Optimal estimation and other issues, to achieve good estimation performance, reduce complexity, and accurate system error estimation

Active Publication Date: 2018-08-10
HANGZHOU DIANZI UNIV
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Problems solved by technology

However, the two-step least squares estimation based on the pseudo-linear registration model ignores the problems of noise structure and correlation, and cannot achieve the optimal estimation of systematic bias

Method used

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  • CTLS-based external radiation source radar net bistatic distance error registration method
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  • CTLS-based external radiation source radar net bistatic distance error registration method

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Embodiment Construction

[0021] The present invention is based on a CTLS-based double-base distance error registration method for the radar network of the external radiation source. In the radar network system of the external radiation source, the double-base distance information obtained by the receiving station is used to perform system error registration. The method includes the following steps:

[0022] Step 1: In the multi-transmission and single-receiver external radiation source radar network, it includes M external radiation sources and a receiving station, and uses the receiving station to receive measurements of multiple targets to obtain dual-base distance information

[0023]

[0024] Among them, u m,p Indicates the bistatic distance measured by the external radiation source radar system composed of the transmitting source m and the receiving station to the target p; the receiving station is located at the origin (0,0), the number of transmitting sources is M, and the coordinate vector o...

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Abstract

The invention discloses a CTLS-based external radiation source radar net bistatic distance error registration method. First, according to bistatic information obtained by an external radiation sourceradar, an intermediate variable is introduced, a bistatic distance nonlinear equation is converted into a pseudo linear equation so as to be suitable for a least square method, and then a recursive least square method is utilized to perform estimation. Then structured measurement noise in the bistatic nonlinear equation is extracted, and a CTLS estimation model is built. The abovementioned constrained optimization problem is converted into an unconstrained optimization problem and a Newton iteration method is utilized to perform optimization solution. On the basis of a CTLS estimation result,relevance of solved vectors is utilized to further optimize an estimation error. The method provided by the invention fully considers the problem of architecture of originally independent noise afterequation pseudo linear processing through a CTLS method, thus the estimation result is more accurate, and good performance can be achieved when noise is even bigger.

Description

technical field [0001] The invention belongs to the field of radar data processing, relates to the technical field of system error registration for multi-sensor network fusion, and specifically relates to a dual-base distance error registration method for external radiation source radar networks based on constrained total least squares. Background technique [0002] External radiation source radar uses third-party non-cooperative signal sources (such as mobile phone communication signals, TV broadcast signals, and enemy radar information, etc.) Realize the detection and positioning of "radio silent" targets. Since the external radiation source radar itself does not emit electromagnetic signals, it has the advantages of good concealment, strong anti-interference ability, wide monitoring range, and low cost. As a dual / multi-base sensor network system, the external radiation source radar system realizes the positioning and tracking of targets through data fusion processing. ...

Claims

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Application Information

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IPC IPC(8): G01S7/40
CPCG01S7/4004
Inventor 左燕陈志猛蔡立平张日东
Owner HANGZHOU DIANZI UNIV
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