A radio analysis apparatus includes: a processor that calculates a modulation index of a radio signal generated by performing frequency shift keying on a baseband signal, based on phase shift amounts of the radio signal; and a memory that holds information in which bit patterns of the baseband signal are associated with correction values for correcting the phase shift amounts that have dropped by band limitation on the baseband signal. The processor restores the bit patterns of the baseband signal based on the phase shift amounts of the radio signal, corrects the phase shift amounts of the radio signal by using the correction values corresponding to the restored bit patterns, and calculates the modulation index based on the corrected phase shift amounts.

An apparatus comprising a plurality of receivers, a controller and memory storing instructions executable by the controller, the instructions, when executed by the controller causing the controller to receive data of signals received via the receivers as a signal from a transmitter, to segment the received data into a plurality of consecutive segments, to determine if consecutive data segments have changed in a manner indicative of movement of the transmitter and to, based on the determination, determine an angle of arrival of the signal based on data segments that have solely been received before or that have solely been received after a detected change in consecutive data segments indicative of movement of the transmitter or that have been received between two detected changes in consecutive data segments indicative of movement of the transmitter.

An apparatus comprising a plurality of receivers, a controller and memory storing instructions executable by the controller, the instructions, when executed by the controller causing the controller to receive data of signals received via the receivers as a signal from a transmitter, to segment the received data into a plurality of consecutive segments, to determine if consecutive data segments have changed in a manner indicative of movement of the transmitter and to, based on the determination, determine an angle of arrival of the signal based on data segments that have solely been received before or that have solely been received after a detected change in consecutive data segments indicative of movement of the transmitter or that have been received between two detected changes in consecutive data segments indicative of movement of the transmitter.

A system and method determines a noise free image of a scene located behind a wall. A transmit antenna emits a radar pulse from different locations in front of the wall, wherein the radar pulses propagate through the wall and are reflected by the scene as echoes. A set of stationary receive antennas acquire the echoes corresponding to each pulse transmitted from each different location. A radar imaging subsystem connected to the transmit antenna and the set of receive antennas determines a noisy image of the scene for each location of the transmit antenna. A total variation denoiser denoises each noisy image to produce a corresponding denoised image. A combiner combines incoherently the denoised images to produce the noise free image.

A system and method determines a noise free image of a scene located behind a wall. A transmit antenna emits a radar pulse from different locations in front of the wall, wherein the radar pulses propagate through the wall and are reflected by the scene as echoes. A set of stationary receive antennas acquire the echoes corresponding to each pulse transmitted from each different location. A radar imaging subsystem connected to the transmit antenna and the set of receive antennas determines a noisy image of the scene for each location of the transmit antenna. A total variation denoiser denoises each noisy image to produce a corresponding denoised image. A combiner combines incoherently the denoised images to produce the noise free image.

A determination of an angle of arrival of radiofrequency (RF) radiation can be made using compressive sensing techniques to inform a receiver portion of a radar system using fewer measurements and samples of the received signal. A method for compressive sensing at an array antenna includes forming a plurality subarrays of array elements from the array antenna such that each subarray includes two or more array elements, capturing data at the plurality of subarrays of array elements, modulating phase properties of the data captured at each of the subarrays, combining the modulated data from each of the plurality of subarrays to form a measurement having phase and magnitude measurements corresponding to the combined modulated data and determining angle of arrival information for the data using the measurement matrix.

A determination of an angle of arrival of radiofrequency (RF) radiation can be made using compressive sensing techniques to inform a receiver portion of a radar system using fewer measurements and samples of the received signal. A method for compressive sensing at an array antenna includes forming a plurality subarrays of array elements from the array antenna such that each subarray includes two or more array elements, capturing data at the plurality of subarrays of array elements, modulating phase properties of the data captured at each of the subarrays, combining the modulated data from each of the plurality of subarrays to form a measurement having phase and magnitude measurements corresponding to the combined modulated data and determining angle of arrival information for the data using the measurement matrix.

A measuring device for direction finding of an electromagnetic signal includes an antenna-element for receiving the electromagnetic signal and processing means for determining the direction of the electromagnetic signal and displaying the direction of the electromagnetic signal. The processing means further include direction uncertainty determination means (322) for determining a direction uncertainty angle of the direction of the electromagnetic signal. The processing means are set up for displaying the direction uncertainty angle on display means.

A measuring device for direction finding of an electromagnetic signal includes an antenna-element for receiving the electromagnetic signal and processing means for determining the direction of the electromagnetic signal and displaying the direction of the electromagnetic signal. The processing means further include direction uncertainty determination means (322) for determining a direction uncertainty angle of the direction of the electromagnetic signal. The processing means are set up for displaying the direction uncertainty angle on display means.

An autonomous system with no Customer Network Investment is described, wherein the system is configurable to operate on in a band in addition to the LTE band. Such system allows the definition of hybrid operations to accommodate the positioning reference signals (PRS) of LTE and already existing reference signals. The system can operate with PRS, with other reference signals such as cell-specific reference signals (CRS), or with both signal types. As such, the system provides the advantage of allowing network operator(s) to dynamically choose between modes of operation depending on circumstances, such as network throughput and compatibility.