Broadband digital beam forming method based on radio frequency sampling

A digital beam and broadband technology, applied in the field of wideband digital beamforming based on radio frequency sampling, can solve problems such as large amount of calculation, specific signal and complex engineering implementation

Inactive Publication Date: 2019-12-27
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0005] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a broadband digital beamforming method based on radio frequency direct sampling, which solves the shortcomings of most of the current broadband digital beamforming methods, such as large amount of calculation and complex implementation for specific signals and projects. question

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  • Broadband digital beam forming method based on radio frequency sampling
  • Broadband digital beam forming method based on radio frequency sampling
  • Broadband digital beam forming method based on radio frequency sampling

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Embodiment

[0045] Wideband digital beamforming technology is the core key technology of wideband digital array radar system. However, most of the current wideband digital beamforming methods have disadvantages such as large amount of calculation, targeting specific signals, and complicated engineering implementation. Combining the characteristics of wideband digital array radar with the characteristics of current advanced digital signal processing devices, a wideband digital beamforming method based on radio frequency direct sampling is studied. This method has the advantages of small amount of calculation, good applicability and high engineering feasibility The effectiveness of the method was verified by computer simulation, and the influence of some important parameters on the performance of the method was analyzed. Such as figure 1 shown, including the following processes:

[0046] S1. Receive a broadband radar echo signal through a broadband digital array.

[0047] In this embodime...

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Abstract

Through combination of characteristics of a broadband digital array radar and a recent development level of a current digital signal processor and through theoretical derivation and computer simulation, a broadband digital beam forming method based on radio frequency direct sampling is researched, and a broadband digital array transmitting and receiving beam forming method with good engineering feasibility is provided. The method comprises the following steps of receiving a broadband radar echo signal; obtaining a digital radio frequency signal through radio frequency sampling; and carrying out digital phase shift and integer delay processing on the digital radio frequency signal, thereby finishing broadband digital beam forming processing. The method is not limited by a concrete form andarray manifold of the radar signal. Accurate beam pointing and an approximately ideal main lobe can be realized. Computing quantity is low. The engineering realizability is relatively high. Through control over a signal bandwidth, an ADC sampling frequency and a sampling frequency and signal bandwidth ratio, a sidelobe level of the signal can be controlled.

Description

technical field [0001] The invention belongs to the technical field of array signal processing, and in particular relates to a wideband digital beamforming method based on radio frequency sampling. Background technique [0002] Wideband digital array radar is an array radar with improved signal bandwidth and digitization level on the basis of phased array radar. Due to its outstanding potential performance and functions, it has become one of the development directions of array radar. Research hotspots. Usually, the beam is formed by increasing the number of array elements to improve the angular resolution of the array radar. Therefore, the study of broadband digital beamforming methods with less computation and easy engineering implementation under multi-channel is beneficial to reduce the development cost and risk of broadband digital array radar. [0003] Broadband digital array beamforming methods can be divided into time-domain methods and frequency-domain methods. Cu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 刘明鑫汪学刚邹林
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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