An automotive radar using combinations of the techniques of alternating transmit-receive bursts of digitally frequency modulated millimeter wave carriers; sparse MIMO antenna arrays with sidelobe-suppressive coarse and fine beamforming; frequency hopping; range-walking-compensated Doppler analysis and successive, and subtractive target detection in signal strength order.

A radar system with a transmit pipeline transmitting radio signals, and with a receive pipeline receiving radio signals including radio signals transmitted by own transmitters and reflected from objects in an environment, and interfering radio signals transmitted by other radar systems. The receive pipeline provides interference immunity from interfering radio signals transmitted by other radar systems. The transmit pipeline and/or the receive pipeline avoid transmitting radio signals that interfere with the other radar systems. The receive pipeline includes dual polarization receive channels. The interfering radio signals are a different polarization than the radio signals transmitted by own transmitters and reflected from targets in the environment. The receive pipeline provides improved signal handling dynamic range to avoid receive channels saturating at A-to-D converter stage before the radio signal has reached the digital signal processing domain.

An integrated circuit chip implementing multiplication of an M×N element matrix with an N-element vector to obtain an M-element product by combining the vector with rows of bits of the same significance selected from the matrix one bit-row at a time to form partial products, exploiting the fact that the same potential combinations are needed for all bit-rows and all matrix rows to precompute all of the combinations once and for all, and combining selected partial products for different bit place-significance with a shift-and-add operation only once for each of the M product elements, thereby effectively using only M multiply-equivalent structures. An N-point Complex Fourier Transform can therefore be claimed which only needs 2N real multiplies and the product of an N×N matrix with another N×N matrix requires only N.sup.2 multiplies.

An exemplary radar sensing system utilizing a sparse array antenna structure provides an enhanced angular resolution to detect multiple targets with improved accuracy beyond the abilities of conventional radar. The exemplary radar system uses sparsely located antenna array elements allowing improved FOV, angular resolution, beam width, and side lobes using fewer physical antenna elements. Sparse antenna arrays allow the use of physically larger elements, larger separation between transmitter and receiver elements to reduce mutual coupling, and fewer elements to reduce necessary computations.

Presented is a position-measuring device using UWB antenna, the position-measuring device distinguishing measurement targets positioned indoors from measurement targets positioned outdoors on the basis of UWB signals received from a plurality of UWB antennas. The presented position-measuring device includes: a first UWB antenna; a second UWB antenna; a third UWB antenna; a signal processing module which outputs a signal received from the first UWB antenna and a UWB signal received from at least one among the second UWB antenna and the third UWB antenna; and a position-measuring module which measures the position of the measurement target on the basis of the UWB signals output from the signal processing module.

A vehicle radar system according to one aspect of the present disclosure includes a first radar device, a second radar device, and a third radar device. The first radar device transmits a first radar wave for which a transmission period or a transmission frequency is different from transmission periods or transmission frequencies of a second radar wave to be transmitted from the second radar device and a third radar wave to be transmitted from the third radar device. The second radar device transmits the second radar wave for which transmission polarization or a transmission beam direction is different from transmission polarization or a transmission beam direction of the third radar wave to be transmitted from the third radar device.

A polarimetric radar consisting of a transmission arrangement, in which the carrier signals have a circular polarization, wherein all the transmitters of the transmission arrangement are used simultaneously and each transmitter is operated by way of a transmission signal, which is modulated by way of an individual digital phase code, a receiver arrangement, which receives the reflected signals via an antenna arrangement, wherein there are both reception antennas that are configured for left-hand circularly polarized electromagnetic waves and reception antennas that are configured for right-hand circularly polarized electromagnetic waves, wherein the use of a plurality of transmitters and receivers provides an overall arrangement, which is operated in accordance with the multiple-input multiple-output method.

Certain aspects of the present disclosure provide techniques for radar detection by an apparatus. In certain aspects a method for radar detection by an apparatus includes selecting one or more radar transmission parameters based on a reference time, wherein the reference time is common to at least a group of vehicles. The method further includes performing radar detection using the selected radar transmission parameters and the reference time.

In one embodiment, a method includes identifying, for each of one or more environmental radars, one or more parameter values associated with a radar signal of the environmental radar, determining one or more transmission parameter values for the radar, wherein a combination of the one or more transmission parameter values is different from a combination of the one or more parameter values of each of the one or more environmental radars, and configuring the radar with the determined one or more transmission parameter values.

A radar apparatus according to the present disclosure includes: a transmission unit configured to transmit radio waves; a reception unit including a first receiver configured to receive a first reflected radio wave and a second receiver configured to receive a second reflected radio wave, the first reflected radio wave and the second reflected radio wave having different polarization characteristics from each other and being included in reflected radio waves that are the radio waves reflected by a detection target; and a control unit configured to control operations of the transmission unit and the reception unit, and configured to identify the detection target on the basis of the operation of the transmission unit, a first reception level at the first receiver, and a second reception level at the second receiver.