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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 that the distance between stations cannot be too large, and the difficulty of wiring cables, etc., and achieve the effect of frequency deviation correction

Active Publication Date: 2013-04-10
THE SECOND RES INST OF CIVIL AVIATION ADMINISTRATION OF CHINA
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AI Technical Summary

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 that the distance between stations should not be too large, and this method cannot be used for clock synchronization in the monitoring of large-scale air targets

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Embodiment Construction

[0056] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0057] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless expressly stated otherwise, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0058] Reference-response pairs and target-response pairs:

[0059] The target TDOA calculation module receives the data transmitted by each remote station, and preprocesses these data. Extract the target symbol and TOA. For the target TDOA calculation module, the reference answer is only a special target. Other processing flows and goals are the same.

[0060] Assume that the time difference TDOA between a target arriving at two remote re...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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