Symeo Gmbh

Siemens Aktiengesellschaft

Siemens Industry, Inc.

Peter Gulden

Martin Vossiek

Michael Gottinger

Fabian Kirsch

Mark Christmann

Maximilian Fleischer

Osman Ahmed

Bernd Gromoll

Helmut Forster

Hana Kostka

Walter Kusebauch

Alfred Michel

Eugen Szabo De Bucs

Heinz Christoph

Martin Glänzer

Friedrich Kozdon

Mathias Schnicke

Berthold Pfadenhauer

Gerald Edinger

Patric Heide

Eckhard Storck

Stephan Max

Hermann O Berg

Sven Röhr

Christoph Mammitzsch

Yassen Dobrev

Mike Keaveney

Andreas Hofmann

Igor Bilous

The invention relates to a radar system, particularly a primary radar system, comprising at least one signal generating device (SGEN), which is configured to generate and to emit a transmit signal sequence, at least one signal detection device, which is configured to receive and to detect a receive signal sequence reflected on an object structure, at least one mixer (MIX) for mixing the receive signal sequence with the transmit signal sequence and for forming N baseband signals s(n, t), where n=1 . . . N, and at least one scanning device (ADC), which is configured to scan the N baseband signals at scanning frequencies fs(n), wherein at least two, preferably at least three, further preferably all of the N scanning frequencies fs(n) differ from each other.

Radar system and procedures for operating a radar system

The invention describes a method for reducing interference effects in a radar system, which has at least two transceiver units (S, S), which are in particular spatially separated from one another, wherein the method comprises the following steps: —a transmission step (VS), in which a first transmission signal (sigTX) of the first transceiver unit (S) is sent and received to and by a second transceiver unit (S) and a second transmission signal (sigTX) of the second transceiver unit (S) is sent and received to and by the first transceiver unit (S) via a radio channel (T), wherein the transmission signals (sigTX, sigTX) are modulated according to an orthogonal frequency multiplex method; and—a pre-correction step (VS), in which correction values (γ1, γn, γ2) are determined from the received transmission signals (sigTX, sigTX) and in particular are exchanged between the transceiver stations (S, S), wherein the received transmission signals (sigRX, sigRX) are postprocessed on the basis of the correction values (γ1, γn, γ2), so that influences of interference variables, in particular of phase noise and/or a time offset and/or unknown initial phase positions, are reduced.

Method for reducing interference effects in a radar system

A radar method comprising transmitting and receiving signals simultaneously or overlapping in time by spatially separated transceiver units. Comparison signals are formed from transmitted and received signals by respective transceiver units. A phase correction is formed for each of a plurality of sample values, to generate a measure of phase difference per sample value between the comparison signals. A measure of phase difference is used to improve accuracy of distance or velocity measurements between the transceiver units. A radar system includes transceiver units and an evaluation unit configured to perform the method.

Radar method and radar system

The invention relates to a radar method for exchanging signals between at least two non-coherent transceiver units which respectively have initially non-synchronous, in particular controllable, clock sources, having the following steps: a synchronization in which clock offsets and/or clock rates of the clock sources of the at least two transceiver units are adapted; a full-duplex measuring process in which a first transmission signal of the first transceiver unit is transmitted to the second transceiver unit and a second transmission signal of the second transceiver unit is transmitted to the first transceiver unit via a radio channel; with synchronization prior to the full-duplex measuring process being carried out in such a way that a time offset and/or a frequency offset between the transmission signals at least substantially remain(s) constant during a transmission time of the full-duplex measuring process.

Method and device for non-coherent distributed full-duplex transmission radar systems

The invention relates to a radar system for capturing surroundings of a moving object, in particular a vehicle and/or a transportation apparatus, such as a crane, in particular, wherein the system is mounted or mountable on the moving object, wherein the radar system comprises at least two non-coherent radar modules (RM, RM, . . . RM N) having at least one transmitter antenna and at least one receiver antenna, wherein the radar modules (RM, RM, . . . RM N) are arranged or arrangeable in distributed fashion on the moving object, wherein provision is made of at least one evaluation device which is configured to process transmitted and received signals of the radar modules to form modified measurement signals in such a way that the modified measurement signals are coherent in relation to one another.

Method and apparatus for capturing the surroundings

A method for compensating for noise in a secondary radar system is described. The method includes, using a first transceiver, transmitting, in temporally overlapping manner, a first transmission signal containing a first interfering component and a second transmission signal containing a second interfering component, and compensating for at least one of phase shifts or frequency shifts resulting from the first and second interfering components by evaluation of the first and second transmission signals.

Method and device for compensating for interfering influences

Phase noise compensation can be performed in a primary radar system, such as in transceiver hardware. A first reflected reception signal can be received, corresponding to a reflection of a first transmission signal from an object, and a first measurement signal can be generated using mixing or correlation of the first reflected reception signal and the first transmission signal. A second measurement signal can be similarly generated from a second transmission signal and a second reflected reception signal. The first and second measurement signals include respective components including complex conjugate representations of each other. The components correspond to interfering components associated with phase noise, and such respective components can cancel each other to suppress phase noise.

Method and device for compensating for phase noise

Transmitting-receiving devices, such as within a radar system, can use a clock generator from which various higher-frequency signals are derived. For example, respective transmitting-receiving devices can include high-frequency (HF) generators. The present subject matter concerns a system and a method for providing measurement signals having increased coherence as compared with signals originally transmitted by the transmitting-receiving devices. Such measurement signals can be exchanged for synchronization. Increased coherence can enhance overall system performance, such as to assist in separating returns associated with weaker targets from those associated with stronger targets, or to provide enhanced angular resolution, as illustrative examples.

Radar system and method for operating a radar system

A method is described in particular for reducing interference due to phase noise in a radar system, in which in a first noncoherent transceiver unit (NKSE) a first signal (sigTX) is generated and transmitted, in particular emitted, via a path (SP), in a further, in particular second noncoherent transceiver unit (NKSE), a first signal (sigTX) is generated and transmitted, in particular emitted, via the path (SP), the signals (sigTXand sigTX) are received directly or indirectly in the respective other transceiver unit and are processed further therein as received signals sigRXand sigRX, in the first transceiver unit (NKSE), a comparison signal (sigC) is formed from its first signal (sigTX) and from such a first signal (sigRTX) received from the further transceiver unit (NKSE) via the path (SP), and in the further transceiver unit (NKSE), a further comparison signal (sigC) is formed from its first signal (sigTX) and from such a first signal (sigTX) received from the first transceiver unit (NKSE) via the path (SP), wherein the further comparison signal (sigC) is transmitted, in particular communicated, from the further transceiver unit (NKSE) to the first transceiver unit (NKSE), wherein in a first step, deviations of the signals sigCand sigCwhich are induced by systematic deviations in the transceiver units (NKSE, NKSE), are compensated for, wherein in a second step, at least one complex value from a first of the two comparison signals or from a signal which was derived from this first comparison signal is used for the purpose of adapting at least one complex value of the second of the two comparison signals or a value of a signal which was derived from the second comparison signal, and thus to form a signal (sigCC), wherein the adaptation takes place such that by a mathematical operation, the vector sum or the difference of the complex values is formed or the sum or the difference of the phases of the complex values is formed.

Method and system for reducing interference caused by phase noise in a radar system

The invention relates to a radar method for determining the angular position, the location, and/or the velocity, in particular the vectorial velocity, of a target, wherein a first transceiver unit and at least one second transceiver unit, which is spatially separated in particular from the first transceiver unit, are not synchronized, but a measurement beginning of the first transceiver unit and the second transceiver unit is triggered in a wireless or wired manner with a chronological deviation &#x394;t, wherein measurements of the transceiver units are coherently processed.

Radar method and system for determining the angular position, the location, and/or the velocity of a target

A wave-based method has at least two reference stations () transmit signals (s, s; s, s). The signals are transmitted almost at the same time (S, S), are transmitted in the same frequency range, and are separable using a multiplexing method. At least one of the sending reference stations (), besides transmitting its own signal (s, s), also receives at least one signal (s, s) sent by another reference station () at the same time and determines a time stagger (&#x3c4;) and/or a phase angle between its own transmission and the reception with high precision. At least one receiving station () which at least receives the signals (s, s) receives the signals (s, s) from at least two of the reference stations (). A system and stations perform the wave-based method.

System and method using reference stations and a receiving station

The invention relates to a method in a radar system, wherein: in a first non-coherent transmitting-receiving unit (NKSE), a first signal (sigTX) is generated and is transmitted, in particular emitted, via a path (SP); in a further, in particular second non-coherent transmitting-receiving unit (NKSE), a first signal (sigTX) is generated and is sent, in particular emitted, via the path (SP); in the first transmitting-receiving unit (NKSE), a comparison signal (sigC) is formed from the first signal (sigTX) of the first transmitting-receiving unit and from such a first signal (sigTX) received from the further transmitting-receiving unit (NKSE) via the path (SP); and in the further transmitting-receiving unit (NKSE), a further comparison signal (sigC) is formed from the first signal (sigTX) of the further transmitting-receiving unit and from such a first signal (sigTX) received from the first transmitting-receiving unit (NKSE) via the path (SP), wherein the further comparison signal (sigC) is transmitted, in particular communicated, to the first transmitting-receiving unit (NKSE) by the further transmitting-receiving unit (NKSE). The invention further relates to a radar system and to a device of a radar system that perform such a method.

Method in a radar system, radar system, and/or device of a radar system

A method and related system are provided for locating a current position or a coupling location of a mobile unit, which can send or receive for location determining purposes, using a leaky waveguide, wherein a radio signal is fed from the mobile unit into the waveguide or vice versa, wherein the signal is sent by the mobile unit and received by the two transmitting and receiving (T/R) apparatuses, or one signal is sent by each of the two T/R apparatuses and received by the mobile unit, wherein a receiving time is determined for each received signal, and the current position or the coupling location is determined from two such receiving times. The T/R apparatuses, arranged at opposite ends of the waveguide, are synchronized relative to each other prior to the determination of the current position or coupling location, or prior to the reception of the signal.

Method and system for locating a current position or a coupling location of a mobile unit using a leaky waveguide

A radio transmitter is provided at least comprising a signal generator for generating a continuous signal and an antenna for outputting a transmission signal, wherein at least one output of the signal generator is connected with at least one input of the antenna. Herein, the signal generator is connected with the antenna via an interrupt unit connected between the two for selectively interrupting and maintaining a signal connection between the signal generator and the antenna.

Radio transmitter, radio receiver, system and method with a radio transmitter and radio receiver

A circuit arrangement and a method for synchronizing clocks in a network is provided, comprising a plurality of at least two nodes, wherein at least two of said nodes can communicated with each other and each have a local clock, wherein, in a receiving one of said nodes, from at least one transmitting other such node, a global time transmitted by said transmitting one of said node of said transmitting one of said nodes is received, and a global time of said receiving node is determined or estimated as a function of both the received global time of said transmitting node and of a local time of the receiving node's own local clock.

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Munich, Germany

Peter Gulden