摘要:
A ranging and positioning system comprising transmitters and receiver nodes communicating together by chirp-modulated radio signals, that have a ranging mode in which ranging exchange of signals takes place between a master device and a slave device that leads to the evaluation of the range between them. The slave is arranged for recognizing a ranging request and transmit back a ranging response containing chirps that precisely aligned in time and frequency with the chirps in the ranging requests, whereupon the master can receive the ranging response, analyze the time and frequency the chirps contained therein with respect to his own time reference, and estimate a range to the slave.
摘要:
There is provided a method of measuring the distance between a first device and a second device, the method comprising performing a time-of-flight-based distance measurement to measure the distance between the first device and the second device, wherein the length of the signals transmitted and/or the number of time-of-flight measurements obtained during the time-of-flight-based distance measurement is determined according to an accuracy level required for the distance measurement.
摘要:
The invention relates to a method for determining an installation position (11, 12, 13, 15) of at least one sensor unit (3, 4, 5, 6) which is designed for detecting a surrounding region (33) of a motor vehicle (1), a communication system (2) of the motor vehicle (1), wherein the sensor unit (3, 4, 5, 6) is connected to a connection point (15) of the communication system (2) of the motor vehicle (1), wherein the communication system (2) is designed with the connection point (15) for the sensor unit (3, 4, 5, 6) characterizing one installation position (11), and with at least one additional connection point (16, 17, 18) for the sensor unit (3, 4, 5, 6) characterizing an additional installation position (12, 13, 14), wherein the sensor unit (3, 4, 5, 6) can be compatibly connected to the connection point (15) or the additional connection points (16, 17, 18), and, depending on which connection point (15, 16, 17, 18) the sensor unit (3, 4, 5, 6) is connected to, information characterizing this specific installation position (11, 12, 13, 14) is automatically provided to the sensor unit (3, 4, 5, 6) via the communication system (2).
摘要:
A frequency modulated continuous wave (FMCW) radar system is provided that includes a receiver configured to generate a digital intermediate frequency (IF) signal, and an interference monitoring component coupled to the receiver to receive the digital IF signal, in which the interference monitoring component is configured to monitor at least one sub-band in the digital IF signal for interference, in which the at least one sub-band does not include a radar signal.
摘要:
The invention concerns a method and system for testing radar systems' capability to detect and track targets. In particular, the method comprises defining a first non-linear trajectory of a non-linear moving target to be simulated, wherein said first non-linear trajectory comprises a sequence of first positions, each defined by respective range, azimuth and elevation with respect to an antenna (1) of a radar system under test. The method further includes computing a second non-linear trajectory based on the first non-linear trajectory. Said second non-linear trajectory comprises a sequence of second positions, each of which is defined by respective range, azimuth and elevation with respect to the antenna (1) of the radar system under test, is associated with a corresponding first position defined, with respect to the antenna (1) of the radar system under test, by the same azimuth and elevation as said second position and by a greater range than said second position, and is associated with a corresponding time at which the non-linear moving target is located at the corresponding first position associated with said second position. The method further includes: providing a drone (21) equipped with an on-board antenna (212) for receiving radar signals transmitted by the antenna (1) of the radar system under test; and flying the drone (21) by following the second non-linear trajectory and by causing said drone (21) to be located at each second position at the corresponding time associated with said second position. Additionally, the method includes also: when the drone (21) is located at one of the second positions, processing an incoming radar signal received by the on-board antenna (212) at said second position so as to generate a processed radar signal simulating a radar echo from the non-linear moving target located at the corresponding first position associated with said second position, and transmitting the processed radar signal by the on-board antenna (212) from said second position towards the antenna (1) of the radar system under test.
摘要:
A method and system are described for measuring displacements and vibrations of an object /structure (P). The method comprises the following steps: transmission of at least one radar wave by a single radar device (Q) positioned at a predefined distance (R) from a receiver device (10) applied on the object /structure (P); reception, by the radar device (Q), of a complex signal (s(t)) consisting of the sum of the signal reflected from said receiver device (10) and of one or more interfering signals (I) generated by one or more corresponding targets (I 1 , I 2 ) substantially stationary and substantially positioned at the same distance (R) from the radar device (Q); separation of the interfering signals (I) from the reflected signal. The separation step comprises a calibration step which consists in the induction, for a pre-determined period of time, of a vibrational motion having a known frequency and duration in the receiver device (10), which consequently operates as a calibration device, for obtaining an estimated value of the interfering signals (I), and in the subtraction of the estimated value of the interfering signals (I) from the complex signal (s(t)), in order to substantially eliminate said one or more interfering signals (I) and obtain the entity of the displacement of the object /structure (P) on the basis of the reflected signal.
摘要:
A system and method for scanning a number of frequencies in a test environment (100, 300, 400). A transmitter (112, 228, 302, 402) and a receiver (114, 228, 302, 402) are moved together to a number of locations in a scanning space (102, 200). Signals are transmitted at the number of frequencies from the transmitter (112, 228, 302, 402) at the number of locations. Reflected signals (171, 310, 412) are received by the receiver (114, 228, 302, 402) at the number of locations. The reflected signals (171, 310, 412) are reflections of the signals transmitted at the number of frequencies from the transmitter (112, 228, 302, 402). The number of locations in the scanning space (102, 200) is identified.
摘要:
The invention relates to a method for operating a sensor arrangement (2) for a motor vehicle (1), in which method a command signal is transmitted via a data bus (8) to a sensor (4) of the sensor arrangement (2) by means of a control device (3), after reception of the command signal a measuring cycle for detecting an object in a surrounding region (7) of the motor vehicle (1) is carried out by means of the sesnor (4), and a multiplicity of sensor data items are made available by the sensor (4), wherein an interrogation signal is determined by means of the control device (3) and is transmitted (S3) to the sensor (4) in addition to the command signal, wherein sensor data items are selected from the multiplicity of sensor data items by the sensor (4) as a function of the interrogation signal, and transmitted (S4) to the control device (3) via the data bus (8).