Passive target positioning method based on channel capacity

A technology of channel capacity and target positioning, applied in positioning, measurement devices, radio wave measurement systems, etc., can solve the problem of incompatibility of the direction finding cross positioning system, achieve high passive target positioning accuracy, and reduce positioning accuracy. effect of influence

Inactive Publication Date: 2013-07-31
HARBIN ENG UNIV
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Problems solved by technology

Therefore, the two methods have inevitable incompatibility in the application of direction finding cross positioning system

Method used

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  • Passive target positioning method based on channel capacity
  • Passive target positioning method based on channel capacity
  • Passive target positioning method based on channel capacity

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Embodiment Construction

[0016] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0017] combine Figure 1~5 , in the passive target positioning system (taking two-station plane positioning as an example), in the passive cross-location system based on direction finding, the observation stations A(0,0) and B(L,0) measure the target T(X , the azimuth angle of Y) is and Measurement error and obbey normal distribution The coordinates of the target T are thus obtained and satisfy the distribution suppose where intersection angle

[0018] Assume that the observation stations A and B receive the signals transmitted by the target T as S A and S B , the amplitudes are a and b respectively, and the corresponding channel Gaussian noise n A and n B obbey normal distribution Since the channel from the target T to the observation station A and from the target T to the observation station B is a parallel Gaussian channel, the rec...

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Abstract

The invention provides a passive target positioning method based on channel capacity. The passive target positioning method includes steps of observing a target T by various alternative observation stations, obtaining observation angles based reference directions of the alternative observation stations as reference lines, transmitting results to a control center of a direction-finding cross-bearing positioning system, combining relative position relation of the observation stations, optionally selecting two observation stations A and B to form a triangular positioning system with the target T, calculating an observation angle with a connecting line of the two observation stations as a reference line, calculating channel capacity C of the system, comparing system channel capacities of various triangular positioning systems, and positioning the target T by means of selecting the triangular positioning system with the highest system channel capacity. Measurement errors of each observation stations are taken into consideration, shortcomings of a minimum positioning fuzzy region area method and a minimum circular probable error method when the minimum positioning fuzzy region area method and the minimum circular probable error method are applied to the direction-finding cross-bearing positioning system are avoided, influence of high difference of the measurement errors of the observation stations to positioning precision is reduced, and the observation angles the observation stations can be quickly set according to the channel capacities.

Description

technical field [0001] The invention relates to a positioning method. Background technique [0002] At present, there are two main standards to measure the positioning accuracy of the direction finding cross-location system: the minimum area of ​​positioning ambiguity area and the minimum circular probability error. Taking two-station plane positioning as an example, both methods are somewhat one-sided, and their positioning accuracy is related to the length of the baseline of the two observation stations or the distance from the target to the baseline (derived from the length of the baseline and the observation angle of the sensor), and Only when the measurement errors of the two observation stations are consistent, the obtained positioning accuracy is the highest. But when the measurement errors are quite different, even if the area of ​​the positioning fuzzy area and the circular probability error take the minimum value, the positioning accuracy at this time is not the h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/00
Inventor 张曙杨作军
Owner HARBIN ENG UNIV
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