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High-precision method and device for measuring time of arrival of pulse

A time-of-arrival and pulse-measuring technology, which is applied to measuring devices, radio wave measuring systems, instruments, etc., can solve the problems of increasing the amount of equipment, and achieve the effects of improving safety, improving scene monitoring capabilities, and precise positioning and identification

Active Publication Date: 2012-06-13
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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Problems solved by technology

If the traditional time measurement method is used to achieve a single-station time measurement accuracy of 1ns, the sampling rate must reach 1000Mhz or more, which will greatly increase the amount of equipment

Method used

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  • High-precision method and device for measuring time of arrival of pulse
  • High-precision method and device for measuring time of arrival of pulse
  • High-precision method and device for measuring time of arrival of pulse

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Embodiment Construction

[0041] The invention discloses a method and device for measuring pulse arrival time with high precision. Specifically, in order to solve the pulse arrival time measurement error caused by the fixed threshold caused by the different pulse amplitudes received by each remote station, an adaptive The threshold method improves the timing accuracy, that is, the fixed ratio of the pulse amplitude is used as the threshold to determine the arrival time of the pulse. Depend on image 3It can be seen that even if the pulse amplitude is different, the fixed proportional time of the pulse amplitude is still at the same time point t, and the pulse arrival time measurement is not affected by the pulse amplitude.

[0042] The above method is applicable to the threshold detection when the IQ signal is input. Since the input signal of this system is the amplitude signal after calculating the modulus and taking the logarithm, the detection method in which the fixed ratio of the pulse amplitude ...

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Abstract

The invention discloses a high-precision method for measuring the time of arrival of a pulse. The method comprises the following steps of: measuring a fixed proportion of amplitude of a single effective pulse as a fixed threshold value; determining the initial time of arrival of the pulse according to an adaptive threshold value; obtaining the deviation of the time of arrival of the pulse by adopting a method for measuring the time by using a difference value, and thus obtaining the time of arrival of the single pulse; and taking an average value of the times of arrival of all the effective single pulses in the same framework as the final time of arrival of the frame. The invention also discloses a device applied to the method. The device is arranged in a plugin with four TigerSharc201 digital signal processing (DSP) units. The invention has the advantages that: the precise time of arrival of target response signals from the ground and nearby space domains of an airport to respective receiving stations are supplied, and the single-station time measurement precision is higher than 1 nanosecond, so that precise location and recognition of an airplane in an airport region are realized, the scene monitoring capacity of the busy airport is improved, and the safety of the airport is improved.

Description

technical field [0001] The invention relates to a new type of self-adaptive high-precision measurement method and a realization device for measuring the arrival time of a pulse train signal sent by a transponder in a target such as an aircraft or an airport ground vehicle to each receiving station in the field of distributed radar. Background technique [0002] The airport surface monitoring system MDS (Multi-static Dependent Surveillance of the Airport Surface, the airport surface of multi-base station related surveillance) is to detect the spatial position of the target through the multi-point positioning technology, and provide the position of each target in the airport ground and nearby airspace. Management provides security. Capture the response signal of the aircraft (vehicle) through the sensors (remote units) arranged near the airport, measure the time of arrival, and use the multi-station TOA (Time Of Arrive, time of arrival) time difference to locate the target at ...

Claims

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Application Information

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IPC IPC(8): G01S5/06
Inventor 颜波涛周喃赵洪立
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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