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Method for compensating frequency and phase consistency of radio frequency channels of phased array radar

A technology of phased array radar and compensation method, which is applied in the direction of using re-radiation, radio wave reflection/re-radiation, measuring devices, etc., and can solve the problems of phase inconsistency of multi-channel signals of phased array radar and failure of coherent superposition, etc.

Active Publication Date: 2015-02-18
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0017] In view of this, the present invention provides a phased array radar radio frequency channel frequency and phase consistency compensation method, which can effectively improve the phase inconsistency of multi-channel signals of phased array radar and the problem that coherent superposition cannot be performed

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  • Method for compensating frequency and phase consistency of radio frequency channels of phased array radar
  • Method for compensating frequency and phase consistency of radio frequency channels of phased array radar
  • Method for compensating frequency and phase consistency of radio frequency channels of phased array radar

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Embodiment Construction

[0097] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0098] The invention provides a radio frequency channel phase consistency compensation method, the basic idea of ​​which is:

[0099] Transmission process: The frequency difference and phase difference between the reference channel and the comparison channel are used as the compensation value before the transmission of the IF broadband digital signal, so that the processed RF broadband signals of each channel are exactly the same.

[0100] Receiving process: Use the frequency difference and phase difference between the reference channel and the comparison channel as the compensation value to adjust the frequency and phase of the NCO, and finally make the IF broadband signal after processing the same as the channel.

[0101] The compensation method is divided into two compensation methods: the transmitting process and the receiving process of the radio f...

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Abstract

The invention discloses a method for compensating frequency and phase consistency of radio frequency channels of phased array radar. The method includes a transmitting process and a receiving process. By means of the method, the problem that the channels fail in phase-coherent accumulation due to differences in time-delay characteristics of different channels can be improved in a targeted manner at the beginning of transmitting medium-frequency broadband digital signals; by adjusting the frequencies and phases of NCOs (numerically controlled oscillators) of the channels during the receiving process, the frequencies and phases of the treated medium-frequency broadband digital signals of the channels are made identical. During each of the transmitting process and the receiving process, a reference passage and a comparison passage are subjected to coherence and treated via single-frequency-point signals, many parameters are eliminated, and the calculating process is made simple and feasible.

Description

technical field [0001] The invention relates to the field of radar signal processing, in particular to a compensation method for frequency and phase consistency of a phased array radar radio frequency channel. Background technique [0002] Broadband phased array radar is an important equipment for the modernization of national defense in my country. In order to achieve a long detection distance, phased array radar needs to have a large aperture; in order to achieve large-angle airspace coverage, phased array radar needs to have wide-angle scanning capabilities; In order to realize space target recognition, the phased array radar needs to have high range resolution, that is, the radar transmission signal must have a large bandwidth. However, the aperture effect of phased array radar becomes more and more serious with the increase of antenna aperture and transmission signal bandwidth. At present, the solution to the aperture transit time problem has been relatively mature. In...

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Application Information

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IPC IPC(8): G01S7/40
CPCG01S7/40G01S7/4008G01S7/4021G01S2013/0245
Inventor 刘海波龙腾牛阳刘泉华
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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