WO2013176577A1

WO2013176577A1 - Method for transmitting and receiving radio signals

Info

Publication number: WO2013176577A1
Application number: PCT/RU2013/000213
Authority: WO
Inventors: Владимир Петрович ПАНОВ
Original assignee: Panov Vladimir Petrovich
Priority date: 2012-05-24
Filing date: 2013-03-18
Publication date: 2013-11-28
Also published as: RU2496272C1

Abstract

The method makes it possible to measure unequivocally the spacial coordinates of a device with a high degree of precision in accordance with modern requirements. To this end, the device, with pre-established not necessarily precise coordinates, in a given three-dimensional Cartesian coordinate system, of the phase center of a receiving antenna of said device, records in a given time keeping system the moments in time at which radio signals are received, the signals being transmitted by N > 4 radio engineering devices, and, using the inputted parameters, measures the spacial coordinates of the device according to the simple measurement equations proposed. The method can be realized with the help of modern hardware components and microprocessor technology.

Description

Title of invention:

Method for transmitting and receiving radio signals

Technical field

The invention relates to communication technology, and more particularly, to methods for transmitting and receiving radio signals and extracting information in a receiving information system. Such systems include, in particular, radionavigation and radar systems, radio reconnaissance systems for radio equipment, radio surveillance of the Earth’s surface, etc.

[one. Radio engineering systems / Yu.M. Kazarinov et al. Ed. Yu.M. Kazarinova. -M .: IC "Academy", 2008, p. 7]. The inventive method relates to the transmission and reception of radio signals and information retrieval in a receiving information system located on a radio signal receiving radio object, including a mobile one. Radio signals transmit N radio engineering objects in an amount of at least four, including mobile ones, with the coordinates of the antenna phase centers specified in time. The sources of radio signals can be either ground-based point-to-point transmitting systems, or satellite or other mobile radio-navigation systems. The implementation of the method will make it possible, among other things, to measure the spatial coordinates of radio engineering objects, simplify the corresponding information extraction systems, and increase their technical and economic efficiency, taking into account all components that affect cost and technical indicators.

Prior art

Known methods for transmitting and receiving radio signals and extracting information in an information system are used, inter alia, for measuring the coordinates of radio engineering objects and are based on the use of angle gages, rangefinder, difference and total rangefinder, and methods for determining the location of an object with amplitude, time, frequency, phase and pulse-phase methods for measuring the parameters of the radio signal [RF Patents (U) N-> N ° 2018855, 21 15137, 2258242, 2264598, 2309420, 2325666, 23631 17, 2371737, 2378660; Fundamentals of Aircraft Testing / E.I. Krynetsky et al. Ed. E.I. Krinetskogo.-M .: Mashinostr., 1979, p. 64-89; Radio engineering systems / Yu.M. Kazarinov et al. Ed. Yu.M. Kazarinova. -M .: IC "Academy", 2008, p.17-18, pp. 7.1-7.4, ch. 10.; Melnikov Yu.P., Popov SV. Radio intelligence. Methods for assessing the effectiveness of the determination of radiation sources .- M .; Radio Engineering, 2008, Ch. 5]. Known methods have certain disadvantages, for example, the need for mechanical movement of the antenna system, the inability to unambiguously determine the coordinates of the object, the need for a priori information about the location of the object, insufficient reliability. According to the criterion of minimum sufficiency, the closest analogue is the method of transmitting and receiving radio signals and extracting information in an information system, used in the well-known difference-range measuring method for determining the coordinates of an object [1. Radio engineering systems / Yu.M. Kazarinov et al. Ed. Yu.M. Kazarinova. -M .: IC "Academy", 2008, p.17-18, pp. 7.1-7.4].

Disclosure of invention

In the proposed method, spatial coordinates are measured through newly introduced measured parameters b _k and form factors determining the location of radio signal sources using simple measurement equations. Thanks to this, higher speed and measurement accuracy are achieved. An advantage of the proposed method in comparison with the known ones is the possibility of increasing the technical and economic efficiency of radio engineering complexes for measuring spatial coordinates and other characteristics of an object functionally related to its coordinates, including ensuring the accuracy and reliability of their measurement in accordance with modern requirements. In order to achieve the indicated technical result in accordance with the present invention, in a method for transmitting and receiving radio signals and extracting information in a radio object located on a radio signal receiving station, stationary or mobile, an information system including the possibility of preliminary obtaining the coordinates of the phase center of the receiving antenna of the said radio object χο, γο, ζο in a given three-dimensional Cartesian coordinate system (Χ, Υ, Ζ), respectively, Ν transmitting radio signals of radio engineering eskih objects of at least four, stationary or movable. Correspondingly fixed or predetermined time coordinates in said coordinate system, _{x ", y", z n} , where n varies from 1 to N, not the arrangement of the coplanar phase centers of their transmitting antennas, each with its transmitting antenna synchronously transmitting radio signals at the same time or each with an orderly set time delays, receive them as a receiving antenna at said radio signal receiving radio object, identifying receive the received radio signals to the corresponding radio signal transmitting radio objects, register the moments of the radio signal reception times in the predetermined time reference system on the receiving radio technical object, moreover, in the presence of the indicated orderly specified delays in time, respectively, with their exception, if necessary, the radio signal reception times centered, excluding the time from the average value of each of all moments and, based on thus recorded moments of the times t _n determined n parameters of d _{_n} = vt _n, where υ - velocity of propagation of radio signals, with the information system receiving radio technical object through said preliminary The obtained coordinates of the center of the receiving antenna of the receiving radio-technical object χο, γο, ζο and said predetermined the coordinates of the phase centers of the transmitting antennas x „, y„, z _n initially determine the necessary the distances between the point with the coordinates χο, γο, ζο and the coordinates of the phase centers of the transmitting antennas x „, y„, z _n required for the equation of measurements in accordance with the expression

D _n = ^ (xo-x _n ) ² + (yo-y _n ) ² + (zo-z _n ) ² (1) and dimensionless parameters

ξ _η = (xo-x _n ) / D _n , η _η = (yo-y _n ) lD _n , θ „= (zo-z _n ) l D _n , (2) dimensionless parameters are determined through them and where is the index / varies from 1 to 6,

and through the parameters a ₍ determine the dimensionless parameters A _j , where the index j varies from 0 to 6, in accordance with the expressions =

- "2" 5 - ^aa , ( ⁴ )

A = ° 2 ^{a ~ a} 1 -> ^A 2 = ° \ ^a b - ° 5? B = ^a \ ^a 2 - ° \ "

A = ^α 5 ^α 6 - * 3 ^β 4 ”A =“ 4 ^fl 6 - “2 ^Λ 5> = ^α 4“ 5 ~ ^ 6 ”

through d _n of said measured and defined above £>",ξ", η η, θ " measured parameters are L _k, where the index k ranges from 1 to 3, in accordance with the equations of measurement

Ν Ν

*. = * ΣΚ-Α) £ -ΣΚ-Α) Σ £.

(5). = ^ Σ -ΑΚ-Σ -Α) Σ ^

through them and the mentioned parameters A _} measure mainly in accordance with the measurement equations the parameters Ax

/ »AC = (+ ^b i +) ¹ A> ^ζ = (A + Α +» ( ⁶ ) through them and the coordinates xo, yo, zo measure the adjusted spatial coordinates x, y, z of the phase center of the receiving antenna of the specified receiver the radio signals of a radio engineering object in accordance with the measurement equations x = x0 + x, y = y0 + Au, z = zo + Az (7) and, if necessary, sequentially repeat all these initial steps for a specified number of times, each time using the coordinates of the phase center of the receiving antenna of the receiving radio signals of the radio engineering object χο, γο, ζο and Merenii the refined spatial coordinates x, y, z, thus obtained for information on the coordinates information transmitted to consumers, comprising, including, if necessary, as a consumer of information tion at least said group of radio facilities.

In the current level of technology, no sources of information have been identified that would contain information about methods of the same purpose with the specified set of features. The invention is described in more detail below.

The implementation of the invention

The reception of radio signals and the extraction of information, including the spatial coordinates of the radio object, is carried out at the radio signal receiving radio object, whether stationary or mobile. The method includes the possibility of preliminary obtaining the coordinates of the phase center of the receiving antenna of this radio engineering object χο, γο, ζο in a given three-dimensional Cartesian coordinate system (Χ, Υ, Ζ), respectively. Radio signals are transmitted by Ν transmitting radio signals of radio engineering objects in an amount of at least four, stationary or mobile, respectively, with coordinates fixed or set in time in the mentioned coordinate system x _n , y „, z _n , where n varies from 1 to N not located in the same plane of phase prices tro of their transmitting antennas. Each of these N objects with its transmitting antenna synchronously transmits radio signals simultaneously or with ordered time delays.

The radio signals are received by a receiving antenna at said receiving radio object and the received radio signals are identified by the corresponding radio signal transmitting radio objects. At the receiving radio engineering object, moments of times of reception of radio signals are recorded in a given time reference system. Moreover, in the presence of the indicated ordered delays in time, they are accordingly excluded. If necessary, the moments of the times of reception of the radio signals are centered, excluding from each moment the average value of all the moments. Based on the thus recorded time instants t „, the parameters d _n = vt _{n are} determined, where υ is the propagation speed of the radio signals.

In the information system of the receiving radio engineering object, through the previously mentioned coordinates of the phase center of the receiving antenna of the receiving radio engineering object xo, yo, zo and the specified coordinates of the phase centers of the transmitting antennas x „, y _n , z _{n, they} initially determine the distances D _n necessary for the measurement equations between the point with the coordinates χο, γο, ζο and the coordinates of the phase centers of the transmitting antennas x „, y„, z _n in accordance with expression (1). The indicated previously obtained coordinates χο, γο, ζο may have large deviations from the exact values of the coordinates of the object χ, γ, ζ, as will be shown by the example of the implementation of the method.

Using D „and dimensionless parameters (2), dimensionless parameters a and A _j are determined in accordance with expressions (3) and (4). Through d _n measured values and parameters determined in accordance with expressions (1) and (2) _to measure the parameters b in accordance with the measurement of equation (5). Through b _to and A _j measured mainly in accordance with the equations of measurements (6), the parameters Δχ, Δγ, Δζ, and through them and the coordinates χο, γο, ζο measure the adjusted spatial coordinates x, y, z of the phase center of the receiving antenna of the radio signal receiving radio signal in accordance with the measurement equations (7).

If necessary, all the indicated initial actions are sequentially repeated a specified number of times, each time using the measured and refined spatial coordinates χ, γ, ζ as the coordinates of the phase center of the receiving antenna of the receiving radio signals of the radio engineering object χο, γο, ζο . The coordinate information obtained in this way is passed on to information consumers, including, if necessary, including, as a consumer of information, at least the aforementioned radio signal transmitting radio objects.

We show the possibilities of the proposed method for transmitting and receiving radio signals and extracting information about the coordinates of the object. Consider the situation using the minimum possible in this method the number of radio signals transmitting radio engineering objects, namely when using four satellites. The coordinates of the location of the satellites x „, y _n , z _n (in m), given in table 1, are taken from [2. Ryan Stansifer Ex - act solution of the a three dimensional hyperbolic positioning system. Department of Computer Sciences Florida Institute of Technology. Melbourne, Florida USA 32901. Ryan@fit.edu, 20 sept. 2011]:

Table 1

For modeling, consider the situation in which the receiving signals of Radio object is at the point with coordinates (in m) = 2.117912 x -Yu ^6, y = _about 6.038289 - June ^10, ζ _ο6 = 4.46376 - ¹⁰ June. On it records the moments of times of reception of radio signals t _n in a given time reference system. We introduce the errors of measurement of times t _n in not equal to

At, = 1, At ₂ = 2, Δ / ₃ = 5, At ₄ = -4, respectively. The measured t _n , for convenience, centered relative to the average value of all moments, with the indicated measurement errors are equal (in not) /, = 2.0001540023 - 10%

/ ₂ = -1.1519899811 -J ⁷ , t ₃ = 7.7473606426 -10 ⁶ , t = 1.7723851657 - 10 ⁶ . The parameters d _n corresponding to these t _n are defined as d _n = vt _n , where υ = 0.299792458 m / ns.

As pre-obtained coordinates

of the receiving radio engineering object in this example, the coordinates χ0 taken with deviations of tens of thousands of meters from the coordinates x _o6 , y _o6 , z _o6 are used

The obtained simulation results are presented in table 2, all in m.

table 2

From table 2 it follows that the claimed method allows already at the second stage to determine the coordinates of the object with deviations of several meters from the exact values of the coordinates (in this case, the previously obtained coordinates were set with deviations of tens of thousands of meters from the coordinates of the object x _o6 , y _o6 , z _o6 ). In practice, these deviations are associated with error styami measurement t _n, since at the next stage, the refinement of these deviations occurs only at 4-6 decimal places and is less than mm.

In practice, the inventive method allows, having information on its location on a radio electronic object about its location within a sufficiently large area (for example, a big city) with at least one point with known geodetic coordinates, to unambiguously measure the coordinates of this object with errors determined only by to the measurement error of the moments of time of reception of radio signals.

Industrial applicability

The inventive method provides:

- unambiguous extraction of information about the spatial coordinates of the object with great accuracy, corresponding to modern requirements,

- the ability to perform measurements with high speed using one of the well-known radio engineering methods and the existing elemental base and microprocessor technology,

- efficient use of the radio frequency spectrum,

- implementation of simultaneous measurements on an unlimited number of radio engineering objects.

The effectiveness and efficiency of using the proposed method lies in the fact that it can be applied in practice for the development and improvement of radio engineering measurement systems, mainly, the coordinates of objects, as well as in other applications. The method allows to determine the coordinates with great accuracy and more simply in comparison with the known methods.

Thus, the claimed method provides the emergence of new properties not achieved in analogues. The analysis made it possible to establish: analogues with a set of features identical to all the features of the claimed technical solution are absent, which indicates the conformity of the claimed method to the “novelty” condition. Also, the popularity of the effect of the actions provided for by the essential features of the claimed invention on the achievement of the specified result was not revealed. Therefore, the claimed invention meets the condition of patentability "inventive step".

Claims

Claim

A method for transmitting and receiving radio signals and extracting information in a radio engineering object located on a radio signal receiving station, stationary or mobile, information system, including the possibility of preliminary obtaining the coordinates of the phase center of the receiving antenna of the radio object χο, γο, ζο in a given three-dimensional Cartesian coordinate system (Χ , Υ, Ζ), respectively, for which Ν transmitting radio signals of radio engineering objects in the amount of not less than four, stationary or mobile, respectively GOVERNMENTAL with a fixed or predetermined time coordinates in said siste- IU coordinates x _n, y ", z _n, where n varies from 1 to N, is not located in the one plane hydrochloric phase centers of transmit antennas, each of its over- the transmitting antenna synchronously transmits the radio signals simultaneously or each with orderly specified time delays, receive them by the receiving antenna at said radio technical object receiving the radio signals, the received radio signals are identified by the corresponding radio transmitting radio signals to technical objects, the moments of the times of receiving radio signals in a given time reference system are recorded at the receiving radio-technical facility, moreover, in the presence of the indicated ordered delays in time, respectively, with their exception, if necessary, the moments of the times of receiving radio signals are centered, excluding from each moment the average value of all the moments and based on the thus registered moments times t _n is determined by the parameters d _{_n} - vt _n, where υ - propagation velocity radiosigna- fishing, while in the inf rmatsionnoy system receiving radio technical object through said preformed coordinates of the phase center of the receiving antenna of the receiving object radiotechnical

χο, γο, ζο and given coordinates of the phase centers of the transmitting antennas x „, y„, z _n initially determine the necessary equations for measuring the distance between the point with coordinates xo, yo, zo and the coordinates of the phase centers of the transmitting antennas x „, y _n , z _n in accordance with the expression

D _n = j (xo - х _п f + (уо-у „) ² + (zo-z _n f and dimensionless parameters

ξ „= (xo-x _n ) ID _n , η„ = (уо-y „) ID _n , θ _η = (ζο-z _n ) l D _n , through them the dimensionless parameters are determined and where the index / varies from 1 to 6,

and through the parameters i, determine the dimensionless parameters _y , where the index j varies from about to 6, in accordance with the expressions

four,

through the above-mentioned measured d „and above, the determined D„, ξ „, η _η , θ _η measure the parameters b _k , where the index k varies from 1 to 3, in accordance with the measurement equations

= ΝΣ {ά _η -Ό _η ) ξ _η - {ά _η -ϋ _π ) Σξ _η ,

η = 1 l = 1 l = 1

through them and the mentioned parameters A. measured mainly in accordance with the measurement equations, the parameters

& x = (A _i b _l + A ₄ b ₂ + A ₅ b ₃ ) / A ₀ , Ay = (A ₄ b _l + A ₂ b ₂ + A ₆ b ₃ ) / A ₀ , Az = (A ₅ b _l + A ₆ b ₁ + A ₃ b ₃ ) / A ₀ , through them and the coordinates xo, yo, zo measure the adjusted spatial coordinates x, y, z of the phase center of the receiving antenna of the specified radio signal receiving receiver in accordance with the equation measurements χ = χο + Δχ,, y = уо + у, ζ = ζο + Δζ and, if necessary, sequentially repeat all the indicated initial actions a specified number of times, each time using the coordinates of the phase center of the receiving antenna the radio object receiving radio signals χο, γο, ζο its measured updated spatial coordinates χ, γ, ζ, the coordinates obtained in this way are transmitted to consumers of information, including, if necessary, including as a consumer of information at As mentioned Ν transmit radio signals objects.