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Method of Restoration of Radar Direct Arrival Wave from External Radiation Source

A technology of external radiation source radar and recovery method, which is applied in the field of external radiation source radar direct wave recovery, can solve the problems of increased algorithm calculation and unfavorable engineering implementation, and achieve the effect of realizing recovery and easy engineering implementation

Active Publication Date: 2017-05-03
HOHAI UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with the increase of the space diversity dimension, the calculation amount of the algorithm increases greatly, which is not conducive to the engineering realization of the method.

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  • Method of Restoration of Radar Direct Arrival Wave from External Radiation Source
  • Method of Restoration of Radar Direct Arrival Wave from External Radiation Source

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Embodiment Construction

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0026] figure 1 It is a schematic flow chart of an embodiment of the method for recovering the direct wave of the external radiation source radar provided by the present invention, figure 2 yes figure 1 The principle block diagram, such as figure 1 and figure 2 shown, including:

[0027] S101: The reference channel of the external radiation source radar adopts a space diversity method to receive diversity signals of multiple diversity channels;

[0028] S102...

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Abstract

The invention discloses a direct wave recovery method for external radiation source radar. The method comprises: S101, receiving, by a reference channel of the external radiation source radar, diversity signals of a plurality of diversity channels through a space diversity method; S102, processing the diversity signals of each diversity channel by adopting a one-path equalizer to obtain multi-path equalizer output signals; S103, summating the multi-path equalizer output signals to obtain direct wave signals; S104, calculating an error term according to the direct wave signals; S105, calculating a mean square error according to the error term, and judging whether the mean square error is smaller than a preset threshold; S106, if the mean square error is not smaller than the preset threshold, returning to S104 to calculate next error term; and S107, if the mean square error is smaller than the preset threshold, iterating the vectors of the equalizers every Ng sampling points. The method is small in calculation quantity and easy to implement in engineering.

Description

technical field [0001] The invention relates to the technical field of radar, in particular to a method for recovering direct wave of external radiation source radar. Background technique [0002] Direct wave recovery is the key technology of FM broadcast external emitter radar. With the application of the system near the city or in the mountainous environment, the serious environmental clutter makes it very difficult to recover the radar direct wave from the external radiation source. The traditional direct wave recovery uses the main lobe of beamforming to align the direction of the direct wave signal, and uses the side lobe of the direct wave antenna to suppress the multipath signal. In the case of severe multipath, multipath clutter enters from the main lobe, causing signal distortion. The constant modulus blind equalization technique can also be used to purify the direct wave, including the multipath that enters the main lobe at the same time. In the case of severe m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/35G01S7/42
CPCG01S7/354G01S7/42
Inventor 王峰蒋德富
Owner HOHAI UNIV
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