Abstract:
An apparatus (100; 200) for object information acquisition comprises: an object detecting unit (110; 210) configured to monitor a scene to detect a moving object (10) in the scene and determine an angular direction associated with the moving object (10), a radar unit (120; 220) configured to detect a range of the moving object (10) and a velocity of the moving object (10), wherein the radar unit (120; 220) is configured to be controlled based on the detection of the moving object (10) to selectively steer a beam (30) emitted by the radar unit (120; 220) into the angular direction associated with the moving object (10), wherein the radar unit (120; 220) is configured to detect a response from the moving object (10) for determining the range of the moving object (10) and the velocity of the moving object (10).
Abstract:
The present disclosure relates to a vehicle radar system (3) comprising a main control unit (38), a first radar sensor arrangement (4a) and a second radar sensor arrangement (4b), separated by a certain distance (d) and comprise a corresponding transmitter and receiver antenna arrangement (10a, 10b; 13a, 13b). Each receiver antenna arrangement (13a, 13b) has a corresponding receiver antenna radiation beam (47a, 47b) with a corresponding beam pointing azimuth angle (ϕ 1 , ϕ 2 ) relative a forward direction (F) in a corresponding maximum gain extension (46a, 46b). The maximum gain extension (46a, 46b) converge for beam pointing azimuth angles exceeding 0°. Each radar sensor arrangement (4a, 4b) is arranged for generating, transmitting and receiving radar signals (6a, 6b) in radar cycles. The radar signals (6a, 6b) are transmitted during a common time period for a major part of each radar cycle, where information regarding the time for transmission of each plurality of radar signals (6a, 6b) is obtained for each radar sensor arrangement (4a, 4b).
Abstract:
There is provided a radar sensor and method. The radar sensor comprises a plurality of transmit and receive antennas, a transceiver, a digital signal processor, a filter and an interface. The transceiver is configured to digitize received radar signals to provide a plurality of digital samples. The digital signal processor is configured to form a measurement matrix by transforming the plurality of digital samples into a distance/relative velocity matrix for each combination of the transmit and receive antennas. The filter is configured to identify samples forming the measurement matrix having a signal to noise ratio higher than a threshold value. The interface is configured to transmit the identified samples and their location in the measurement matrix to a remote host processor configured to further carry out direction of arrival processing on the identified samples.
Abstract:
The method comprises at least the following steps:- Generating (1) pseudo-random noise in the digital domain coded on a number N of bits, sampled at a given frequency FH/N; - Multiplexing (2) in the digital domain the binary signals produced by each of the N bits at; sampling frequency FH so as to obtain noise coded on one bit at said frequency FH a - Transferring (3) the noise thus coded into the analogue domain via a low-voltage differential transmission interface; - Filtering (4) the analogue signal in a passband which may be centred on half the sampling frequency of an analogue/digital converter (23).
Abstract:
An orthogonal separation device of the invention includes a demodulator that performs a demodulation process corresponding to each of a plural number N of antennas for each of a plural number P (=M × N) of pulse waves (R11 to R1M), ..., (RN1 to RNM) which arrives at the plural number N of antennas by transmitting, at the same time, a plural number M of pulse waves having phases Æ 1 to Æ M set as different arrays of known discrete values and that generates a plural number P of demodulated signals (R' 11 to R' 1M ), ..., (R' N1 to R' NM ), and includes a phase adjuster that adjusts difference among the phases of a plural number P of demodulated signals (R' 11 to R' 1M ), ..., (R' N1 to R' NM ) according to the arrays of known discrete values and generates a plural number P of in-phase signals (r11 to r1M), ..., (rN1 to rNM).
Abstract:
Described herein is an automotive radar system and related processing techniques utilizing a three channel switched antenna to improve the angular resolution of an azimuth tracking radar.
Abstract:
Die Erfindung betrifft eine Vorrichtung und ein Verfahren zur Verarbeitung eines empfangenen Dopplerradarsignals mittels einer bistabilen Kippstufe.
Abstract:
The present invention discloses an apparatus (160) for detecting a speed and a distance of at least one object (105a) with respect to a receiver (110a) of a reception signal (120). The apparatus (160) comprises at least one interface (210) for reading in at least one in-phase component (I1) and one quadrature component (Q1) of a plurality of temporally successive reception signals (120) each representing a signal (125) which is reflected to the receiver (110a) at the object (105a) and was emitted at a predefined transmission frequency (f). The apparatus (160) also comprises a unit (220) for forming a first detection value (xvr) using the in-phase component (I1) and the quadrature component (Q1) of a first of the reception signals (120), wherein the first detection value (x vr ) corresponds to a predetermined reference speed (v) and a predetermined reference distance (r) of the object (105a) from the receiver (110a). The apparatus (160) also comprises a unit (230) for determining a second detection value (x vr ) using the in-phase component (I1) and the quadrature component (Q1) of a second of the reception signals (120), wherein the second detection value (x vr ) corresponds to the predetermined reference speed (v) and the predetermined reference distance (r) of the object (105a) from the receiver (110a). Finally, the apparatus (160) comprises a unit (440) for determining a speed (v), corresponding to the reference speed (v), of the object (105a) with respect to the receiver (110a) and the reference distance (r) as the distance of the object (105a) with respect to the receiver (110a) using the first and second detection values (x vr ).
Abstract:
The present disclosure relates to a vehicle radar system (3, 3') comprising a transceiver arrangement (7, 7') that is arranged to generate and transmit at least a first radar signal cycle (4a) and a following second radar signal cycle (4b). For the first radar signal cycle (4a), a corresponding first received signal (5a) and corresponding first received signal information (20a, 28a) is obtained, and for a following second radar signal cycle (4b), a corresponding second received signal (5b) and corresponding second received signal information (20b, 28b) is obtained. The vehicle radar system (3, 3') is arranged to calculate a difference between the first received signal information (20a, 28a) and the second received signal information (20b, 28b). The present disclosure also relates to a corresponding method.
Abstract:
The present invention relates to a radar level gauge system comprising a first receiver branch for converting a reflection signal to a first digital measurement signal, and a second receiver branch configured to convert the reflection signal to a second digital measurement signal. The first receiver branch modulates an amplitude of the first measurement signal according to a first gain function, and the second receiver branch modulates an amplitude of the second measurement signal according to a second gain function different from the first gain function. The radar level gauge system further comprises processing circuitry configured to determine the filling level based on the first measurement signal and the second measurement signal.