High-precision distributed pulse signal time difference of arrival detection system

A pulse signal and detection system technology, which is applied in the field of civil aviation, can solve the problems of difficult wiring and cable layout, and the distance between stations cannot be too large, so as to reduce the target positioning error and improve the overall performance.

Active Publication Date: 2011-04-20
THE SECOND RES INST OF CIVIL AVIATION ADMINISTRATION OF CHINA
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Problems solved by technology

[0018] It is difficult to lay out wired cables at airports that have already been put into use;
[0019] The use of wired cables for clock comparison requires th

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  • High-precision distributed pulse signal time difference of arrival detection system
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[0057] All features disclosed in this specification, or all disclosed steps in a method or process, may be combined in any way except mutually exclusive features and / or steps.

[0058] Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), unless expressly stated otherwise, may be replaced by other equivalent or alternative features serving a similar purpose. That is, unless expressly stated otherwise, each feature is but one example of a series of equivalent or similar features.

[0059] Reference Answer Pairing and Target Answer Pairing:

[0060] The target TDOA calculation module receives the data sent by each remote station, and preprocesses the data. The target symbol and TOA are extracted. For the target TDOA calculation module, the reference response is only a special target. Other processing flow and goals are the same.

[0061] Assume that the time difference TDOA of a certain target reaching two remote receivers ...

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Abstract

The invention discloses a high-precision distributed pulse signal time difference of arrival (TDOA) detection system. The system consists of a time of arrival (TOA) detection module in a multi-point positioning distant station and a target TOA calculation module in a multi-point positioning central processing station; and the system synchronously corrects time delay errors of a system time synchronization signal processing channel and a target signal processing channel by adopting a method combining global position system (GPS) common-view technology and reference responder synchronization error correction, and corrects TOA measurement errors and TDOA measurement errors in real time by using multiple filter and tracking algorithms. The system makes up the defects of single mode, and realizes high-precision distributed pulse signal TDOA detection so as to reduce the target positioning errors and improve the integral performance of a multi-point positioning system.

Description

technical field [0001] The invention relates to a pulse signal detection system of a multi-point positioning monitoring system in the field of civil aviation. Background technique [0002] The position of the aircraft needs to be monitored in real time in the process of civil aviation transportation. At present, the monitoring equipment used in large quantities is the air traffic control primary and secondary radar. The monitoring accuracy of traditional radar can meet the requirements of air vehicle monitoring accuracy. For airport scenes, the surveillance accuracy of air traffic control radar cannot meet the requirement of <7.5 meters, so new surveillance equipment is required. [0003] The civil aviation multilateration monitoring system belongs to the passive positioning system based on time difference positioning. There are multiple signal receiving stations distributed in different geographical locations in the system. Each receiving station will measure the arri...

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Application Information

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IPC IPC(8): G01S5/06G01S19/07
Inventor 刘昌忠黄忠涛徐自励何东林
Owner THE SECOND RES INST OF CIVIL AVIATION ADMINISTRATION OF CHINA
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