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Measuring frequency selection method based on dual pseudo random code in radio interference positioning

A technology for measuring frequency and interferometry, applied in radio wave measurement systems, radio wave reflection/re-radiation, measuring devices, etc., can solve the problems that the ranging accuracy and ranging range cannot be satisfied at the same time, and achieve the resolution of ranging accuracy Conflict with the range, improve the range of ranging, and increase the effect of anti-interference ability

Inactive Publication Date: 2013-06-12
PLA UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

In the existing distance measurement with equally spaced frequency points, the distance measurement accuracy and the distance measurement range cannot be satisfied at the same time

Method used

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  • Measuring frequency selection method based on dual pseudo random code in radio interference positioning
  • Measuring frequency selection method based on dual pseudo random code in radio interference positioning
  • Measuring frequency selection method based on dual pseudo random code in radio interference positioning

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Embodiment Construction

[0037] The technical idea of ​​the present invention is that in the radio interference positioning system, how to satisfy and maintain the ranging accuracy of the system while expanding the deployment range is the problem to be solved by the present invention.

[0038] The following will describe the present invention in detail in two parts, including the specific implementation steps of the frequency design method of the present invention and the performance of the new method. The performance of the new method is mainly measured by ranging accuracy and ranging range.

[0039] The specific implementation of the main technical steps of the present invention will be further elaborated below.

[0040] Such as figure 2 Shown:

[0041] Step (1). Setting of transmitting and receiving nodes

[0042] An interferometric measurement in radio interferometric positioning includes four nodes, namely two transmitting nodes A, B and two receiving nodes C, D, the measured interference dista...

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Abstract

The invention relates to a measuring frequency selection method based on a dual pseudo random code in radio interference positioning. Three anchoring nodes with known positions and a node to be positioned are arranged; two anchoring nodes are set as emitting nodes; the other anchoring node and the node to be positioned are set as receiving nodes; and the method comprises the steps of emitting node frequency calibration, minimum frequency interval determination, measuring frequency candidate set design, frequency measuring sequence randomized design, emitting, receiving node time synchronization, interference envelope phase difference estimation, interference distance estimation and node position design. The inherent contradiction between the ranging scope and precision of equal-interval interference ranging is solved. In the method, measuring frequency intervals are skillfully arranged; a small frequency interval is used for expanding the period of a whole complete cycle; a big frequency interval is used for guaranteeing the ranging precision; and the interference distance estimation is not influenced by changing the measuring sequences of the frequencies. The measuring frequency selection method based on the dual pseudo random code in radio interference positioning can avoid interference, has anti-interference capacity and can be applied for military anti-interference positioning.

Description

technical field [0001] The invention relates to a distance measuring method in wireless positioning, in particular to a measuring frequency selection method based on double pseudo-random codes in radio interference positioning. Background technique [0002] Localization in wireless networks includes two categories: ranging-based methods and non-ranging methods. [0003] The non-ranging method uses the connection information between nodes to locate, and does not require additional hardware devices, but the accuracy is not high. Based on the ranging method, the distance, distance difference or direction information between the known anchor node and the node to be positioned is measured by measuring the amplitude, phase or frequency of the signal. Measurement signals include acoustic, ultrasonic, infrared and radio signals. Ranging methods include Time of Arrival Ranging (TOA), Time Difference of Arrival Ranging (TDOA), Angle of Arrival Ranging (AOA), Received Signal Power Ra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/38
Inventor 威力齐望东刘鹏袁恩朱亚松季晓君
Owner PLA UNIV OF SCI & TECH
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