High-dynamic pseudo code continuous wave radar long-time accumulation method

A wave radar and long-time technology, which is applied in the field of long-time accumulation of high-dynamic pseudo-code continuous wave radar, can solve the problems of large amount of calculation, affecting the effect of signal accumulation and parameter estimation accuracy, and unable to solve the problem of Doppler migration. Achieve the effect of reducing computational complexity, solving code phase drift and Doppler migration
CN111007476AInactive Publication Date: 2020-04-14BEIJING INSTITUTE OF TECHNOLOGYGY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIJING INSTITUTE OF TECHNOLOGYGY
Publication Date
2020-04-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a high-dynamic pseudo code continuous wave radar long-time accumulation method, which comprises the following steps of: firstly, dynamically reducing the order of a target through an adjacent cross-correlation method, correcting code phase drift caused by high dynamic and high maneuverability of the target, and reducing the Doppler diffusion order; correcting Doppler migration through Lucker transform, and realizing phase-coherent accumulation of signal energy; and finally, estimating a target parameter through peak detection and first-order search. The problems of codephase drift and Doppler migration caused by the high-speed and high-maneuverability target in the pseudo code continuous wave radar are effectively solved, and long-time accumulation and high-precision parameter estimation are realized; code phase drift of the target is corrected through adjacent cross correlation, and compared with a traditional KT method, influence of velocity ambiguity on correction is effectively avoided; a non-search Lucker transform method is adopted to carry out phase-coherent accumulation on signals after code phase drift correction; and compared with a traditional multi-dimensional search GRFT method, the operation complexity is greatly reduced.
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Description

technical field

[0001] The invention belongs to the technical field of microwave radar measurement, in particular to a long-time accumulation method for high-dynamic pseudo-code continuous wave radar. Background technique

[0002] In the pseudo-code continuous wave radar system, for the low signal-to-noise ratio, the long-time accumulation method is usually used to improve the signal-to-noise ratio of the echo signal before detection, so as to realize weak target detection and target parameter estimation. However, the long-term observation of high-speed and high-maneuvering targets has effects such as code phase drift and Doppler frequency migration, which makes the traditional partial correlation-coherent accumulation method unable to effectively focus energy on the range-Doppler plane, seriously affecting The effect of signal accumulation and parameter estimation accuracy. In 2013, Li Yachao et al. published the article "A New Algorithm of ISAR Imaging for Maneuvering Tar...

Claims

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