METHOD FOR THE ANALYSIS OF A WAVE FIELD

• US 20160041253A1
• Filed: 08/21/2015
• Published: 02/11/2016
• Est. Priority Date: 05/18/2011
• Status: Active Grant

• Current Assignee: Lambda:4 Entwicklungen GmbH
• Original Assignee: Lambda:4 Entwicklungen GmbH
• Inventors: Reimann, Rnne
• Granted Patent: US 9,945,930 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01S 11/02 using radio waves G01S19/00 takes precedence
• CPC Class Codes: G01S 11/026 using moving transmitters
• CPC Class Codes: G01S 11/10 using Doppler effect
• CPC Class Codes: G01S 13/84 for distance determination by phase measurement
• CPC Class Codes: G01S 17/74 Systems using reradiation of electromagnetic waves other than radio waves, e.g. IFF, i.e. identification of friend or foe
• CPC Class Codes: G01S 3/143 by vectorial combination of signals derived from differently oriented antennae
• CPC Class Codes: G01S 3/48 the waves arriving at the antennas being continuous or intermittent and the phase difference of signals derived therefrom being measured
• CPC Class Codes: G01S 5/0247 Determining attitude
• CPC Class Codes: G01S 5/02521 using a radio-map
• CPC Class Codes: G01S 5/10 Position of receiver fixed by co-ordinating a plurality of position lines defined by path-difference measurements , e.g. omega or decca systemsG01S5/12 takes precedence ; beacons and receivers cooperating therewith G01S1/306, G01S1/308
• CPC Class Codes: G01S 7/35 Details of non-pulse systems
• CPC Class Codes: H04W 4/023 using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
• CPC Class Codes: H04W 4/026 using orientation information, e.g. compass
• CPC Class Codes: H04W 4/90 Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]

Abstract

A method, device, system and use for determining a distance, location and/or orientation including the at least relative determination of a position of at least one object using at least two active anchors. A first signal is emitted by a first of the two anchors and is received at the object and by a second of said two anchors. A phase measurement is performed at said second anchor and wherein a distance determination with respect to said first anchor is performed and/or the distance from said first anchor to said second anchor is known. A second, particularly electromagnetic, signal is emitted from said second anchor, and information on phase measurement and distance between said first and second anchors is made available to a computation unit and at least one phase measurement respectively of said first and second signal is performed at said object and made available to said computation unit.

Claims

1. A method for the analysis of a, particularly electromagnetic, wave field, particularly in relation to at least one propagation direction, particularly location, and/or orientation, wherein from at least one emission-device arrangement of an emitter, m signal sequences which are de-correlated against each other with A signals respectively having a known phase relation to each other, are emitted via s different emission devices and/or different places and/or orientations of the emission-device arrangement, wherein s is greater than or equal to two, wherein A is greater than or equal to two and wherein particularly m is greater than or equal to two, and wherein at at least one, particularly mobile, receiver, particularly with only one reception device, reception is made, wherein an emission characteristic of the emission-device arrangement is being used, particularly in the form of at least one matrix, in order to determine the propagation direction of the signals to the receiver, particularly location and/or orientation of the receiver as seen relatively from the emitter and/or of the emitter.

2. The method as defined in claim 1, wherein the A signals are being emitted at least partially chronologically off-set and/or one signal respectively of several signal sequences are being emitted simultaneously, particularly via an emission device.

3. The method as defined in claim 1, wherein for a de-correlation of the signal sequences against each other, different frequencies, polarizations and/or amplitudes are being used.

4. The method as defined in claim 1, wherein a matrix, particularly auto-correlation matrix AKM is used, which is elaborated or calculated from n not fully correlated measuring vectors of the m signal sequences, which measuring vectors were taken at the receiver, wherein said measuring vectors respectively are formed by measurements of at least two of the A signals of one of the m signal sequences, in order to determine, particularly by way of distance calculation between matrix and emission characteristic, particularly by way of projection, particularly between a sub-space of said matrix and said emission characteristic, the propagation direction of the signals to the receiver, particularly the location of the receiver and/or emitter, where n at least is equal to two, particularly equal to the number of emitted de-correlated signals, particularly equal to m.

5. The method as defined in claim 1, wherein said emission characteristic contains at least one, particularly a multitude of, s×

2 dimensional object(s), which particularly indicates in the first column which signal or respectively signal relations are to be received, when the emitter is arranged in a first orientation, particularly polarization, to the s emission devices or respectively emission positions- and/or orientations and particularly indicates in the second column, which signal respectively which signal relations are to be received, when the receiver is arranged in a second orientation, particularly polarization, to the s emission devices and wherein each line indicates, which signal and/or signal relation is to be received in the emission from one of the s emission devices, wherein particularly the different objects are allocated to one propagation direction respectively.

6. The method as defined in claim 1, wherein at least two emission-device arrangements with respectively at least two emission devices are being used and the propagation direction of the signals to the at least one receiver, particularly orientation and/or location of the at least one receiver and/or emission-device arrangements or respectively emitters on the basis of the emission characteristics of the at least two emission-device arrangements, which can be identical, is being determined.

7. The method as defined in claim 1, wherein, the position and/or orientation of the at least one receiver is being determined.

8. The method as defined in claim 1, wherein a distance calculation is performed via projection between the Eigen-vector-(sub)space of the auto-correlation matrix AKM and the emission characteristic.

9. The method as defined in claim 1, wherein an element of the emission characteristic is multiplied with the inverse matrix, particularly the inverse AKM.

10. The method as defined in claim 1, wherein the at least one matrix is an auto-correlation matrix AKM of measurement vectors and in that on the basis of Eigen values of said AKM, particularly from their relations, particularly by way of division by the square of each associated linear coefficient of the emission characteristic which is emitted into the (sub)space, at least relative upper power limits of wave-field portions are determined.

11. The method as defined in claim 1, wherein said emission characteristic provides a multitude of components, particularly matrices and in that particularly the individual emission-characteristic components are orthogonalized.

12. A device for the at least relative orientation- and or at least relative position determination of a receiver comprising a reception device and at least one stored emission characteristic of at least two emission devices and/or means for their calculation and/or reception and means for the calculation of the orientation and/or location of said receiver.

13. Use of at least one emission characteristic of an emission device arrangement with at least two emission devices, in order to determine, by way of distance calculation between a matrix generated or calculated from at least two not completely correlated measurement vectors of the reception device of at least two signal sequences of the emission device with at least two measurement values of the signals of each signal sequence with a known phase relation, particularly auto-correlation matrix, particularly via projection, particularly between a sub-space of the matrix and of the emission characteristic, the propagation direction of the signals to the receiver, particularly orientation and/or location of the receiver and/or of the emission device.