A pulse radar system and method has long range unambiguous image reflections at high pulse repetition frequency (PRF), long range high resolution radial velocity not limited by Doppler Nyquist limiting, improved signal sensitivity, and strong in-band interference rejection, thereby improving existing radar by increasing the transmission pulse rate by uniquely tagging each outgoing pulse so they can be easily separated when received.

The invention relates to a system for controlling a traffic management at an intersection of at least two traffic routes, wherein the system comprises first radar sensor, which has a first detection region, for detecting road users on the first traffic route, a second radar sensor, which has a second detection region, for detecting road users on the second traffic route, wherein the first detection region and the second detection region overlap in at least one overlapping region, and and an electronic data processing device, which is configured to at least partially combine the sensor data of the first radar sensor and the sensor data of the second radar sensor into combination signals and to control the traffic management system at the intersection at least also as a function of combination signals.

An apparatus is disclosed for radar interference mitigation using a pseudorandom offset. The apparatus includes an antenna array and a wireless transceiver. The wireless transceiver is coupled to the antenna array and is configured to transmit, via the antenna array, a radar transmit signal based on at least one pseudorandom offset. The wireless transceiver is also configured to receive, via the antenna array, at least a portion of another radar transmit signal from another apparatus. The wireless transceiver is additionally configured to receive, via the antenna array, a radar receive signal that includes a portion of the radar transmit signal that is reflected by an object. At a given time, a frequency of the radar receive signal is different than a frequency of the radar transmit signal based on the at least one pseudorandom offset.

A method for operating a first radar sub-sensor and a second radar sub-sensor, in particular in a motor vehicle, the first radar sub-sensor being supplied with voltage by a first switching controller, and the second radar sub-sensor being supplied with voltage by a second switching controller, and the method includes the following steps: Operating the first switching controller at a first switching frequency; and operating the second switching controller at a second switching frequency, the first switching frequency differing from the second switching frequency.

A detection method includes determining a first frequency point of N frequency points, transmitting a radio signal in a first frequency band in N frequency bands. One of the N frequency bands partially overlaps at least one frequency band in other N−1 frequency bands, and an absolute value of a difference between lowest frequencies of any two frequency bands of the N frequency bands is not less than a first threshold (F), or the N frequency bands have at least one second frequency band that partially overlaps the first frequency band, and an absolute value of a difference between a lowest frequency of each second frequency band and a lowest frequency of the first frequency band is not less than F.

A method for operating a stepped frequency radar system is disclosed. The method involves performing stepped frequency scanning across a first frequency range using frequency steps of a first step size, the stepped frequency scanning performed using at least one transmit antenna and a two-dimensional array of receive antennas, changing from the first step size to a second step size, wherein the second step size is different from the first step size, and performing stepped frequency scanning across a second frequency range using the at least one transmit antenna and the two-dimensional array of receive antennas and using frequency steps of the second step size.

Operating a stepped frequency radar system involves performing stepped frequency scanning across a frequency range using at least one transmit antenna and a two-dimensional array of receive antennas and using frequency steps of a fixed step size, processing a first portion of digital data that is generated from the stepped frequency scanning to produce a first digital output, wherein the first portion of the digital data is derived from frequency pulses that are separated by a first step size that is a multiple of the fixed step size, and processing a second portion of digital data that is generated from the stepped frequency scanning to produce a second digital output, wherein the second portion of the digital data is derived from frequency pulses that are separated by a second step size that is a multiple of the fixed step size, wherein the first multiple is different from the second multiple.

Radar signals are generated to have signal characteristics that define multiple sub-pulses in each of a plurality of pulse repetition intervals (PRIs) of a single radar dwell. Electromagnetic radiation is emitted according to the radar signals and the emitted electromagnetic radiation is sensed as radar return signals over a receive interval in each PRI. Coherent integration is performed on a set of the radar return signals and non-coherent integration is performed on another set of the radar return signals.

The techniques of this disclosure describe a scalable cascading automotive radar system that generates a common oscillator signal enabling consecutive chirps to be output more quickly and precisely than any previous cascading automotive radar system, thereby reducing phase noise and improving performance. The scalable cascading automotive radar system combines a respective LO signal output from at least two primary transceivers to distribute the combined signals as a common oscillator signal to be input to all the transceivers of the radar system. Thus, settling time and resetting times that otherwise occur between chirps generated by other automotive radar systems are reduced because the common oscillator signal is no longer constrained to a single LO signal from a single primary transceiver.

A radar system is provided with a plurality of radar units. Each radar unit includes a first processing unit for calculating a distance and a relative speed to an object in the vicinity of each radar unit in accordance with a beat signal, a frequency band of the first modulated waves being a first frequency band, and a modulation period of the first modulated waves being a first modulation period; a second processing unit for calculating a distance to the object in accordance with a beat signal, a frequency band of the second modulated waves being a second frequency band, and a modulation period of the second modulated waves being a second modulation period; and a calculation result determination unit for determining the distance and the relative speed to the object in accordance with calculation results of the first and second processing units.