During operation, a transmitter in an electronic device may provide, to a transmission path, an electrical signal. This electrical signal may be divided by the power splitter into a first output electrical signal in a first output transmission path and a second output electrical signal in a second output transmission path, which may result in transmitting of the first wireless signal and the second wireless signal by antennas. Because the second output transmission path may include a delay element that provides a delay, the second wireless signal may be delayed relative to the first wireless signal. Moreover, N radar receivers in the electronic device may receive first wireless-return signals corresponding to the first wireless signal and second wireless-return signals corresponding to the second wireless signal. These wireless-return signals may be combined to create a virtual array MIMO radar having an antenna aperture size of 2N.

Aspects of the present disclosure are directed toward apparatuses and/or methods involving the communication of radar signals. Certain aspects involve communicating time division multiplexing (TDM) multi-input multi-output (MIMO) radar signals, having pulses with a chirp interval time (CIT) that is different for respective chirps. Positional characteristics of a target may be ascertained based upon both the CIT between each chirp in the communicated radar signals and the time between each corresponding chirp in received ones of the signals reflected by the target. Communication of the radar signals may involve utilizing a combination of antennas to provide a virtual aperture.

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.

In an ultra-wideband (“UWB”) communication system, methods are disclosed for transmitting packets in multiple portions, each having a different pulse repetition frequency (“PRF”). Methods are also disclosed for transmitting packets dis-continuously.

Methods and apparatus for providing realtime, 3D visualization of radar system functionality. A visualization system can receive information from a radar system, such as radar commands and radar parameters. After extracting data from the commands and/or parameters, the visualization system generates a three-dimensional (3D), realtime display showing a field of view (FOV) of radar operations including representations of beams generated by the radar system and targets tracked by the radar system.

A RADAR control apparatus includes a range identifier configured to identify a scan range that is a radial distance from the range identifier, and a control unit configured to receive the scan range and cause a RADAR pulse generation unit to emit a RADAR pulse train that is a pattern of RADAR pulse waves including: a type of RADAR pulse wave; a number of each type of RADAR pulse wave; a RADAR pulse wave duration or RADAR pulse wave width; a RADAR pulse wave amplitude; a temporal spacing between each RADAR pulse wave; a sequential order for the type and the number of RADAR pulse waves; and/or at least one sector of space surrounding the RADAR pulse generation unit through which the RADAR pulse waves will propagate. The control unit is configured to continuously adapt the pattern of RADAR pulses in accordance with the received scan range.

A RADAR control apparatus includes a range identifier configured to identify a scan range that is a radial distance from the range identifier, and a control unit configured to receive the scan range and cause a RADAR pulse generation unit to emit a RADAR pulse train that is a pattern of RADAR pulse waves including: a type of RADAR pulse wave; a number of each type of RADAR pulse wave; a RADAR pulse wave duration or RADAR pulse wave width; a RADAR pulse wave amplitude; a temporal spacing between each RADAR pulse wave; a sequential order for the type and the number of RADAR pulse waves; and/or at least one sector of space surrounding the RADAR pulse generation unit through which the RADAR pulse waves will propagate. The control unit is configured to continuously adapt the pattern of RADAR pulses in accordance with the received scan range.

Systems and methods for determining user equipment (UE) locations within a wireless network using reference signals of the wireless network are described. The disclosed systems and methods utilize a plurality of in-phase and quadrature (I/Q) samples generated from signals provided by receive channels associated with two or more antennas of the wireless system. Based on received reference signal parameters the reference signal within the signals from each receive channel among the receive channels is identified. Based on the identified reference signal from each receive channel, an angle of arrival between a baseline of the two or more antennas and incident energy from the UE to the two or more antennas is determined. That angle of arrival is then used to calculate the location of the UE. The angle of arrival may be a horizontal angle of arrival and/or a vertical angle of arrival.

A method of using a radar sensor for a security system to determine a range for a sensed moving object or person, the method including: transmitting, from the radar sensor, a plurality of radar pulses and, when the object or person is present to reflect the radar pulses, receiving a corresponding plurality of pulses.

Systems and methods for determining user equipment (UE) locations within a wireless network using reference signals of the wireless network are described. The disclosed systems and methods utilize a plurality of in-phase and quadrature (I/Q) samples generated from signals provided by receive channels associated with two or more antennas of the wireless system. Based on received reference signal parameters the reference signal within the signals from each receive channel among the receive channels is identified. Based on the identified reference signal from each receive channel, an angle of arrival between a baseline of the two or more antennas and incident energy from the UE to the two or more antennas is determined. That angle of arrival is then used to calculate the location of the UE. The angle of arrival may be a horizontal angle of arrival and/or a vertical angle of arrival