Abstract:
A radar system for a motor vehicle is describe including a plurality (M) of transmitters for transmitting a radar signal, a receiver for receiving the transmitted radar signal reflected by an object, a signal re-constructor coupled to the receiver. Each transmitter is configured to transmit at least part of a frequency modulated continuous wave signal during a time period T having N sample time periods of duration T/N, and in each of the N sample time periods combinations of at least some of the transmitters transmit. The signal re-constructor is configured to determine the coordinates of an object with respect to the radar system from N measurements of the received frequency modulated continuous wave signal, each of the N measurements being made for a time period of T/N. The radar system may reduce the detection time for objects while maintaining the angular resolution.
Abstract:
One example discloses a multi-sensor assembly, comprising: a first temperature sensor, having a first thermal profile; a second temperature sensor, having a second thermal profile different from the first thermal profile; wherein the first and second temperature sensors are mounted on a set of lead-frames; wherein the first and second temperature sensors include a first heat path input coupled to an ambient environment, and a second heat path input coupled to at least one of the lead-frames; and wherein the first and second sensors and set of lead-frames are included in a single multi-sensor assembly. Another example discloses a method of manufacture for the multi-sensor assembly.
Abstract:
Various exemplary embodiments relate to a method for detecting an object using radar system having M transmit antennas, N receive antennas, and a processor, including: receiving, by the processor, N×M digital signals, wherein the N receivers receive M received signals corresponding to M sequences of encoded transmitted signals resulting in N×M digital signals; processing the N×M digital signals to produce N×M first range/relative velocity matrices; applying a phase compensation to N×(M−1) first range/relative velocity matrices to compensate for a difference in range between the N×(M−1) first range/relative velocity matrices and the Mth range/velocity matrix; decoding the M phase compensated range/relative velocity matrices for the N receivers using an inverse of the transmit encoding to produce M decoded phase range/relative velocity matrices for the N receivers; detecting objects using the M range/relative velocity matrices for the N receivers to produce a detection vector.
Abstract:
Aspects of the present disclosure are directed to circuits, apparatuses and methods for generating communication signals resistant to early-detect-late-commit attacks. An example embodiment, a plurality of data symbols is generated that includes first and second data symbols. A communication signal is generated that is decodable according to a mapping of the first and second data symbols to respective first and second waveforms. The first waveform has a leading edge that is indicative of the first waveform, and second waveform has a second leading edge that is indicative of the second waveform. In generating the communication signal, a first portion of the communication signal is modulated according to the first waveform for the first data symbol. A second portion of the communication signal is modulated, for the second data symbol, according to a modified second waveform having a leading edge that is indicative of the first waveform.
Abstract:
Aspects of the present disclosure are directed to apparatuses and methods involving the detection of signal characteristics. As may be implemented in accordance with one or more embodiments, an apparatus includes a radar or sonar transceiver that transmits signals and receives reflections of the transmitted signals. A data compression circuit determines a compression factor based on characteristics of the signals, such as may relate to a channel over which the signal passes and/or related aspects of an object from which the signals are reflected (e.g., velocity, trajectory and distance). Data representing the signals is compressed as a function of the determined compression factor.
Abstract:
One example discloses a multi-sensor assembly, comprising: a first temperature sensor, having a first thermal profile; a second temperature sensor, having a second thermal profile different from the first thermal profile; wherein the first and second temperature sensors are mounted on a set of lead-frames; wherein the first and second temperature sensors include a first heat path input coupled to an ambient environment, and a second heat path input coupled to at least one of the lead-frames; and wherein the first and second sensors and set of lead-frames are included in a single multi-sensor assembly. Another example discloses a method of manufacture for the multi-sensor assembly.
Abstract:
Disclosed is an integrated sensor chip package comprising an integrated sensor chip enveloped in a packaging layer (30), the integrated circuit comprising a substrate (10) having a major surface; and a light sensor comprising a plurality of photodetectors (12a-d) on a region of said major surface; the packaging layer comprising an opening (32) exposing said region, the integrated sensor chip package further comprising a light blocking member (20) over said opening, the light blocking member defining an aperture (22) exposing a first set of photodetectors to light from a first range of directions and exposing a second set of photodetectors to light from a second range of directions, wherein the first range is different to the second range. An apparatus including such an integrated sensor chip package and a method of manufacturing such an integrated sensor chip package are also disclosed.
Abstract:
A method of radar detection and a radar system for a motor vehicle are described. The radar system includes a transmitter for transmitting a radar signal having a time period, a plurality of receivers for receiving the transmitted radar signal reflected by an object, a signal compressor having a plurality inputs coupled to each of the receivers and at least one signal compressor output, the signal compressor being configured to compress the received signals to fewer output signals, each output signal having a number of samples. A signal re-constructor having at least one input coupled to each the signal compressor output and configured to determine a plurality signal strength values from the compressed signals, each signal strength value corresponding to a signal strength for a respective time-of-flight and angle-of-arrival value pair of a received signal. The radar system may detect an object with less memory and a lower power consumption while maintaining angular resolution.
Abstract:
A passive keyless system including a base that selectively allows access to a restricted environment through a base transceiver operating with an encrypted link on first and second frequencies, and a base recording element storing base measured movement history information. Also, a passive keyless device with at least one sensor detects a movement property of the device, a device recording element stores movement history information about the device and reflecting the detected movement property, and a device transceiver communicating with the base transceiver, and transmitting to the base transceiver encrypted security information identifying the device in accordance with a passive keyless protocol and/or the movement history information, and an access request element that causes the device transceiver to request access to the base transceiver. The base uses the base measured movement history information and movement history information when allowing access to the restricted environment.