Symeo Gmbh

Michael Gottinger

Martin Vossiek

Peter Gulden

Mark Christmann

Fabian Kirsch

Yassen Dobrev

Christoph Mammitzsch

Igor Bilous

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.

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Buckendorf, Germany

Michael Gottinger