Digital audio broadcasting passive radar system target detection system and method

A technology of external radiation source radar and digital audio broadcasting, applied in the direction of radio wave measurement system, utilization of re-radiation, reflection/re-radiation of radio waves, etc.

Active Publication Date: 2017-08-29
WUHAN UNIV
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  • Abstract
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Problems solved by technology

When used as a source of opportunity radiation, it will bring many new opportunities and challenges to external radiation source radar

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  • Digital audio broadcasting passive radar system target detection system and method
  • Digital audio broadcasting passive radar system target detection system and method
  • Digital audio broadcasting passive radar system target detection system and method

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Embodiment Construction

[0077] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, and are not intended to limit this invention.

[0078] see figure 1 , the system of the present invention includes a signal receiving unit, a signal processing unit and a terminal display unit, wherein the signal processing unit is divided into an analog-digital separation module, a CDR processing module, an FM processing module and an analog-digital fusion module. The CDR processing module includes a signal reconstruction submodule, a clutter suppression submodule, a digital sideband synthesis submodule, a matched filter submodule, a target detection submodule and a target distance fine estimation submodu...

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Abstract

The invention discloses a digital audio broadcasting passive radar system target detection system and method. The system comprises a signal receiving unit, a signal processing unit and a terminal display unit. The signal receiving unit comprises an antenna module, an analog receiver and a digital receiver and is used for receiving and acquiring a FM frequency-band digital audio broadcasting CDR signal operating in an analog-digital hybrid mode or a pure digital mode. The signal processing unit comprises an analog-to-digital separation module, a CDR processing module, an FM processing module and an analog-digital fusion module, and is used for realizing target detection and fusion in the analog-digital hybrid mode or the pure digital mode. The terminal display unit is used for displaying a synchronization peak, reference signal reconstruction quality, a clutter suppression effect, and a target information fusion result. The system and method are applicable to the CDR analog-digital hybrid mode or the pure digital mode, have wide coverage, high distance resolution, and good low-level coverage performance, and have an effective detection and analysis capability for moving objects.

Description

technical field [0001] The invention belongs to the technical field of external radiation source radar, and relates to a digital audio broadcasting external radiation source radar system and a signal processing method. Background technique [0002] External radiation source radar is a new type of bistatic (multistatic) radar that does not emit signals itself and relies on a third-party source of radiation for target detection and tracking. The typical third-party radiation source is FM broadcasting. Because of its excellent characteristics such as high transmission power and wide coverage, external radiation source radar based on FM broadcasting signals has always attracted the attention of the academic community, and has received the most extensive and in-depth research. However, due to the instability of the FM signal spectrum, the detection performance of the FM external radiation source radar is not stable. [0003] Since the 1990s, stimulated by the ever-increasing use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/00
Inventor 万显荣但阳鹏傅岩刘玉琪
Owner WUHAN UNIV
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