Radar adaptive sidelobe cancellation algorithm

An adaptive and cancellation technology, applied to radio wave measurement systems, instruments, etc., can solve problems such as threats, radar performance impact, and complex electromagnetic environment for radar work, and achieve narrow beam width, strong directivity, and sidelobe level low effect

Pending Publication Date: 2021-05-07
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0002] As a kind of military equipment, radar plays an irreplaceable role in modern warfare. In radar systems, interference is the most lethal to radar detection performance. The continuous emergence of advanced electronic interference measures and equipment has led to the work faced by modern radars. The electromagnetic environment is becoming increasingly complex
Various forms of interference have seriously affected and threatened the performance of radar

Method used

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  • Radar adaptive sidelobe cancellation algorithm
  • Radar adaptive sidelobe cancellation algorithm
  • Radar adaptive sidelobe cancellation algorithm

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Embodiment Construction

[0019] 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 making creative efforts belong to the protection scope of the present invention.

[0020] see figure 1 , the present invention provides a technical solution: a radar adaptive sidelobe cancellation algorithm, including a main channel and several auxiliary channels; wherein, the main channel signal is synthesized after being weighted by the main antenna, and is used to determine the target orientation; the auxiliary channel The signal is fed separately by each auxiliary antenna. The auxiliary antenna is usually a low-gain omnidirectional anten...

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Abstract

The invention discloses a radar adaptive sidelobe cancellation algorithm and an adaptive sidelobe cancellation system. A radar adaptive sidelobe cancellation system comprises a main channel and a plurality of auxiliary channels. A main channel signal is weighted by a main antenna and then synthesized, is used for determining the target direction, and has the characteristics of strong directivity, narrow beam width, low sidelobe level and the like. Auxiliary channel signals are independently sent in by auxiliary antennas, the auxiliary antennas are low-gain omnidirectional antennas, and the gain of the auxiliary antennas is equivalent to the minor lobe level of the main antenna. When a desired signal and interference simultaneously arrive at the main and auxiliary antennas, a desired signal component in each auxiliary channel is far smaller than a desired signal component in the main channel, and the interference amplitude is roughly equivalent. If real-time weighted summation is carried out on the auxiliary channels to compensate for the fixed phase difference caused by the wave path difference between the main channel and the auxiliary channel, and then subtraction operation is carried out on the output of the main channel, interference can be cancelled in a self-adaptive mode.

Description

technical field [0001] The invention relates to the technical field of adaptive sidelobe cancellation algorithms, in particular to a radar adaptive sidelobe cancellation algorithm. Background technique [0002] As a kind of military equipment, radar plays an irreplaceable role in modern warfare. In radar systems, interference is the most lethal to radar detection performance. The continuous emergence of advanced electronic interference measures and equipment has led to the work faced by modern radars. The electromagnetic environment is becoming increasingly complex. Various forms of interference have seriously affected and threatened the performance of radar. Effective anti-jamming means are the conditions for the normal operation of the radar, and accurate interference analysis is the premise of effective anti-jamming. There may be various active and passive interferences in the working environment of military radars, most of which enter the receiver through the side lobe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/28G01S7/292
CPCG01S7/2813G01S7/2923
Inventor 田红
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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