Smiths Heimann Gmbh

Telefonaktiebolaget Lm Ericsson (publ)

Technische Universitat Munchen

Friedrich-Alexander-Universitat Erlangen-Nürnberg

Michael Jeck

Uwe Hildebrand

Lorenz-Peter Schmidt

Jochen Weinzierl

Frank Gumbmann

Bernd Bartscher

Thomas Unshelm

Uwe Flehmig

Juergen Detlefsen

Claudius Volz

Phat Hue Tran

Hue-Phat Tran

Hue Phat Tran

Jürgen Detlefsen

For examining objects, in particular for inspecting persons for suspicious items, devices having a scanning system for scanning the object and having an evaluating system are known. An optical marking system is provided, which indicates the position of an item classified as suspicious on the object itself or in a mirror image of the object by means of visible light.

Device for examining an object, in particular for inspecting persons for suspicious items

A method for detecting hidden objects by means of electromagnetic millimeter waves is provided, in which a test object is irradiated with millimeter waves and the millimeter waves that are reflected from the test object are evaluated. The millimeter waves are focused on different depth layers of the test object during the irradiation thereof.

Method and device for detecting hidden objects by means of electromagnetic millimeter waves

To depict test objects using electromagnetic waves, particularly to check people for suspicious articles, an apparatus is provided having: an antenna which emits electromagnetic waves, particularly millimetric waves, means for concentrating the emitted waves in three dimensions, and means for manipulating the waves at the point of high concentration such that this point serves as a moving virtual antenna for SAR evaluation. Whereby the means for three-dimensional concentration contain a rotatably mounted, focusing or defocusing, quasi-optical element and the means for manipulating the waves at the point of high concentration contain a reflector. In accordance with the invention, the quasi-optical element and the reflector are rotatably mounted about a common rotary axis and at the same angular velocity.

Device for imaging test objects using electromagnetic waves, in particular for inspecting people for suspicious items

A radio base station node () of a telecommunications network comprises a baseband transmitter () and plural radio frequency (RF) paths () between the baseband transmitter () and an antenna system (). A measurement entity () is provided, preferably near the antenna system (), for making a measurement or comparison of a time of detecting of a power modulation for each of plural RF transmission paths (), e.g., a time of detecting of a power modulation for a first of the plural RF transmission paths and a time of detection of a power modulation for a second of the plural RF transmission paths. A transmission timing adjustment unit () uses the power modulation measurement or comparison for adjusting timing of transmission of signals for the plural RF transmission paths for obtaining a desired time alignment for the plural RF transmission paths.

Aligning radio base station node transmission timing on multiple transmit paths

In order to image test objects by electromagnetic waves, in particular millimetric waves, a test object is illuminated with the electromagnetic waves, the scattered waves are received, and are evaluated for a representation of the test object in the form of an image based on the principle of 'synthetic aperture radar' (SAR). In order to allow as large an area as possible to be imaged with high resolution in a short time, the phase centres of the transmitting and receiving antennas are, according to the invention, moved on a circular path parallel to the respective digital focus planes of the imaging system, and are at the same time shifted linearly in a further direction parallel to the respective focus plane. The method can be used for monitoring people for suspicious objects, for example for monitoring airline passengers at an airport.

Method and device for high-resolution imaging of test objects by electromagnetic waves, in particular for monitoring people for suspicious items

A method for imaging test objects by means of electromagnetic waves, in particular for the purpose of checking individuals for suspicious articles, in which method the test object is illuminated by electromagnetic waves, the scattered waves are received and evaluated for an imaginal representation of the test object on the basis of the synthetic aperture principle (SAR). A synthetic aperture is produced by the waves output by an antenna being concentrated initially in spatial terms, the point of high concentration being moved on a reflector along a circle.

Method and device for imaging test objects by means of electromagnetic waves, in particular for inspecting individuals for suspicious items

A method for imaging test objects by millimeter waves, especially for checking individuals for suspicious objects is provided, whereby the test object is gradually irradiated with millimeter waves along its circumference and the scattered waves are received and evaluated in order to display an image of the test object. A viewing direction of the transmitting area and a direction of reception of the receiving area extend at an angle of 15&#xb0; to 70&#xb0;, preferably 20&#xb0; to 35&#xb0; to the longitudinal axis of the test object. For evaluation of the scattered waves in the direction of the longitudinal axis of the test object, a pulse radar or FMCW radar technology is used, and for evaluation at an angle to the longitudinal axis, SAR technology is used.

Method and device for imaging test objects by means of millimeter waves, in particular for inspecting individuals for suspicious objects

A base transceiver station for a radio communication system comprises a transmitter unit (TU), a receiver unit (RU) and a transmit path between the transmitter unit (TU) and an antenna. The receiver unit (RU) determines output data from received signals and the transmitter unit (TU) converts input data into transmitted signals and pre-distorts the transmitted signals using at least one compensation value. The base transceiver station comprises also a branching unit for transferring at least a portion of a transmitted signal from the transmit path to the receiver unit (RU) and a processing unit (PU) which is adapted to receive a representation of the input data and the output data. The processing unit (PU) compares the input data to the output data, determines a first compensation value for the pre-distortion according to the comparison and updates the compensation value of the transmitter unit (TU) with the first compensation value. Methods and computer programs embodying the invention are also described.

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Mainz, Germany

Michael Jeck