Abstract: 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 1, RM 2, . . . RM N) having at least one transmitter antenna and at least one receiver antenna, wherein the radar modules (RM 1, RM 2, . . . 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: The invention relates to a method for evaluating, in particular for imaging and/or for a MIMO method, a radar system comprising at least one first radar unit for emitting and receiving signals and at least one second radar unit for emitting and receiving signals, which form a total radar array, wherein only a partial radar array of the total radar array is used in the evaluation.

Abstract: A method serves for imaging polarimetry. A chipless, passive transponder which has a plurality of surface regions with different polarimetric properties is illuminated fully polarimetrically by radar radiation. At least one polarization-encoded image of the transponder is generated using the radar radiation reflected thereby, and the different surface regions of the transponder in the polarization-encoded image can be recognized by their at least one polarimetric property. The passive, chipless transponder has at least two surface regions with different polarimetric structures.

Abstract: 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 (NKSE1) a first signal (sigTX1) is generated and transmitted, in particular emitted, via a path (SP), in a further, in particular second noncoherent transceiver unit (NKSE2), a first signal (sigTX2) is generated and transmitted, in particular emitted, via the path (SP), the signals (sigTX1 and sigTX2) are received directly or indirectly in the respective other transceiver unit and are processed further therein as received signals sigRX12 and sigRX21, in the first transceiver unit (NKSE1), a comparison signal (sigC12) is formed from its first signal (sigTX1) and from such a first signal (sigRTX2) received from the further transceiver unit (NKSE2) via the path (SP), and in the further transceiver unit (NKSE2), a further comparison signal (sigC21) is formed from its first signal (sigTX2) and from such a first signal (sigTX1) received from the first transceiver unit

Abstract: 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 ?tn, wherein measurements of the transceiver units are coherently processed.

Abstract: A wave-based method has at least two reference stations (1, 2) transmit signals (s1, s2; s3, s4). The signals are transmitted almost at the same time (S1, S2), are transmitted in the same frequency range, and are separable using a multiplexing method. At least one of the sending reference stations (1, 2), besides transmitting its own signal (s1, s2), also receives at least one signal (s2, s1) sent by another reference station (2, 1) at the same time and determines a time stagger (?1) and/or a phase angle between its own transmission and the reception with high precision. At least one receiving station (7) which at least receives the signals (s1, s2) receives the signals (s3, s4) from at least two of the reference stations (1, 2). A system and stations perform the wave-based method.

Abstract: The invention relates to a method in a radar system, wherein: in a first non-coherent transmitting-receiving unit (NKSE1), a first signal (sigTX1) is generated and is transmitted, in particular emitted, via a path (SP); in a further, in particular second non-coherent transmitting-receiving unit (NKSE2), a first signal (sigTX2) is generated and is sent, in particular emitted, via the path (SP); in the first transmitting-receiving unit (NKSE1), a comparison signal (sigC12) is formed from the first signal (sigTX1) of the first transmitting-receiving unit and from such a first signal (sigTX2) received from the further transmitting-receiving unit (NKSE2) via the path (SP); and in the further transmitting-receiving unit (NKSE2), a further comparison signal (sigC21) is formed from the first signal (sigTX2) of the further transmitting-receiving unit and from such a first signal (sigTX1) received from the first transmitting-receiving unit (NKSE1) via the path (SP), wherein the further comparison signal (sigC21) is tra

Abstract: 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.

Abstract: 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.

Abstract: The invention relates to an imaging method with synthetic aperture for determining an incident angle and/or a distance of a sensor from at least one object in space, wherein at each of a number of aperture points one echo profile is sensed. Advantageously, for several angles assumed as the incident angle, one phase correction value and/or one distance correction value is calculated, adapted profiles are generated based on the echo profiles by adapting the phase with the phase correction value for each assumed angle and/or by shifting the distance with the distance correction value, for the assumed angle, the adapted profiles are summed or integrated, and a probability distribution is derived, and a probability value for the incident angle and/or for the distance is determined therefrom. A determination of the incident angle is also possible independently of the distance, wherein it is possible to only consider velocities or accelerations.

Abstract: 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.

Abstract: The invention relates to a method for increasing the accuracy of a measurement of a radio-based locating system comprising a mobile station and at least one fixed station, wherein the movement of a mobile station from an initial position is detected by way of measuring data of an absolute sensor system and a relative sensor system, a virtual antenna is embodied in the form of synthetic aperture by way of measuring data and the mobile station is focused on the fixed station and/or vice versa by using the synthetic aperture.

Abstract: A method and device for synchronizing a transmitter and a receiver with each other over a radio interface. A transmission signal is produced with a signal source in the transmitter and is transmitted via the radio interface. A corresponding receiver signal is received in the receiver from the radio interface and is evaluated using a receiver signal source signal from a signal source of the receiver adapted to the signal source of the transmitter. The same frequency modulation is applied to the receiver signal source signal, whereby the receiver signal received in the receiver is mixed with the receiver signal source signal to form a mixed signal and the mixed signal is analyzed with respect to frequency unbalance.

Abstract: The invention relates to an imaging method with synthetic aperture for determining an incident angle and/or a distance of a sensor from at least one object in space, wherein at each of a number of aperture points one echo profile is sensed. Advantageously, for several angles assumed as the incident angle, one phase correction value and/or one distance correction value is calculated, adapted profiles are generated based on the echo profiles by adapting the phase with the phase correction value for each assumed angle and/or by shifting the distance with the distance correction value, for the assumed angle, the adapted profiles are summed or integrated, and a probability distribution is derived, and a probability value for the incident angle and/or for the distance is determined therefrom. A determination of the incident angle is also possible independently of the distance, wherein it is possible to only consider velocities or accelerations.

Abstract: An imaging method is provided for imaging or locating an object with a wave-based sensor. A wave field emanates from the object as an object signal, with this object signal emanating from a sensor is received at a sensor position, and wherein the sensor(s) and the object assume a number of spatial positions with respect to each other and form a synthetic aperture, and an echo signal is sensed at each of these sensor positions, a number of function values is extracted from the echo signals, which are allocated to a space coordinate of the object, and a signal with a residual phase characteristic is formed from the function values. Based on a residual phase characteristic that is due to a deviation of real sensor positions from assumed or measured sensor positions, an image point, the object position or the relative movement of the object is determined.

Abstract: The invention relates to a method for increasing the accuracy of a measurement of a radio-based locating system comprising a mobile station and at least one fixed station, wherein the movement of a mobile station from an initial position is detected by way of measuring data of an absolute sensor system and a relative sensor system, a virtual antenna is embodied in the form of synthetic aperture by way of measuring data and the mobile station is focused on the fixed station and/or vice versa by using the synthetic aperture.