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Real-time internal calibration method and device for multi-channel digital receiver

A technology of a digital receiver and a processing method, applied in the field of signal processing, can solve problems such as reducing computational complexity, and achieve the effects of improving positioning accuracy and amplitude and phase extraction accuracy, simple method, and high efficiency.

Active Publication Date: 2018-03-13
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology

[0006] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to provide a multi-channel digital receiver real-time internal calibration processing method and device, which solves the real-time processing of the non-uniform characteristics of amplitude, phase and time delay between channels in a multi-channel radar system. The problem of internal calibration correction, time delay correction is realized through time domain filtering, which greatly reduces the computational complexity

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  • Real-time internal calibration method and device for multi-channel digital receiver
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  • Real-time internal calibration method and device for multi-channel digital receiver

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[0028] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0029] Method example:

[0030] figure 1 It is a flowchart of the real-time internal calibration processing method of the multi-channel digital receiver pro...

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Abstract

The invention discloses a real-time internal calibration method and device for a multi-channel digital receiver. The method comprises the following steps: carrying out matched filtering and frequencyspectrum zero filling on internal calibration data in all channels to obtain signal impact response data of all channels; obtaining amplitudes, phases, and time-delay inconsistency characteristics among all channels based on the impact response data of all channels; carrying out amplitude and phase inconsistency characteristic correction on echo collection data of all channels to obtain correctedecho signals; and carrying out time-delay inconsistency characteristic correction on the corrected echo signals. Therefore, a problem of difficult realization of real-time internal calibration correction for amplitude, phase, and time delay inconsistency characteristics among all channels by the multi-channel radar system is solved; delay correction is realized by time-domain filtering; and the computational complexity is reduced substantially.

Description

technical field [0001] The invention belongs to the field of signal processing, in particular to a real-time internal calibration processing method and device for a multi-channel digital receiver. Background technique [0002] With the development of technology and the improvement of system performance, multi-channel radar has become an important radar system configuration, which ensures the realization of multi-functional radar systems such as interference radar, moving target detection radar, multi-beam radar and digital beamforming radar. [0003] However, with the improvement of radar resolution, the amount of radar data increases rapidly. Due to the limitation of existing system storage and data transmission capabilities, it is difficult to store and download multi-channel data. Therefore, it is necessary to complete the real-time processing of multi-channel data in the system. fusion processing. At present, because each channel of multi-channel system has its own tran...

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Application Information

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IPC IPC(8): G01S7/40G01S7/292
CPCG01S7/292G01S7/4021
Inventor 高阳张选民闫伟杨娟娟党红杏杨绪吴疆
Owner XIAN INSTITUE OF SPACE RADIO TECH
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