Combined constraint based self-adaptive monopulse direction finding method

A single-pulse, self-adaptive technology, applied in measuring devices, radio wave measurement systems, radio wave reflection/re-radiation, etc., can solve problems such as non-universality, achieve small signal-to-noise ratio, low time complexity, high precision effect

Active Publication Date: 2019-12-20
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, it has requirements on the distribution of the desired signal and the interference signal, and is not universal

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  • Combined constraint based self-adaptive monopulse direction finding method
  • Combined constraint based self-adaptive monopulse direction finding method
  • Combined constraint based self-adaptive monopulse direction finding method

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[0046] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the implementation methods and accompanying drawings.

[0047] The present invention proposes an adaptive monopulse method after performing joint constraints, in order to make it as close as possible to the conventional static monopulse angle detection curve. In order to further reduce the time complexity of processing, the present invention utilizes the special form of the constructed covariance matrix to perform sub-dimension processing, thereby obtaining a more convenient execution plan with lower algorithm complexity. The steps performed by its various parts are:

[0048] (1) Adaptive monopulse technique based on joint constraints:

[0049] Through the received data of the array, the covariance matrix of the array can be obtained as:

[0050] Among them, E{·} means to take the mathem...

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Abstract

The invention discloses a self-adaptive monopulse direction finding method under combined constraint conditions and belongs to a monopulse direction finding technology of the self-adaptive array signal processing field. The problem of reduction of estimated performance of monopulse in the presence of interference, so that the monopulse performance is improved. Based on the processing process, thecomplexity of time calculation is improved while the optimal weight vector is solved through enlargement of dimensionality, and the combined constraint conditions are equivalent to conventional linearconstraint conditions and have the performance superior to the conventional linear constraint conditions. The method is very close to conventional static-state monopulse, and the monopulse performance is effectively improved. Moreover, compared with conventional monopulse angle measuring methods, the method has the advantages of being small in signal to noise ratio, low in time complexity, high in accuracy and more stable through full utilization of overall processing modes of narrow-band signals. Therefore, the method has higher engineering practicability.

Description

technical field [0001] The invention relates to a monopulse direction-finding technology in the field of adaptive array signal processing, in particular to an adaptive monopulse angle-measuring technology using joint constraints for narrow-band monopulse. Background technique [0002] Target detection and parameter estimation are the most important tasks in tracking radar. The most typical one is monopulse technology (for details, please refer to the literature: T.Vu's article "A new type of high-performance monopulse feed", U.Nickel's article "Monopulse estimation with adaptive arrays"). Monopulse technology can achieve high-precision real-time angle estimation, which is superior to conic scanning technology in both signal-to-noise ratio (SNR) and target fluctuation. Today's monopulse technology has successfully achieved digital sum-difference beam angle measurement through the array design in the field of phased arrays (for details, please refer to the article "A Broadban...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/68G01S7/41
CPCG01S13/68G01S7/418
Inventor 谢菊兰程方昊唐思晴何勤李会勇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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