A method for optimizing the elevational pointing of an antenna of an airborne radar system at an altitude h includes an antenna and processing and calculation means, the method comprising: a. selecting an area of interest b. calculating atmospheric losses L.sub.ref at a reference altitude h.sub.ref at the reference range D.sub.ref and calculating a reference criterion K.sub.ref=40 log.sub.10(D.sub.ref); c. for each possible elevational pointing distance of the antenna D.sub.pt from the area of interest, calculating the antenna elevation S that makes it possible to target the distance D.sub.pt via the centre of the antenna; d. for each distance D from the region of interest, calculating the angle at which the antenna observes the point of the ground at the distance D and calculating a criterion; 1. K(D)=G.sub.e()+G.sub.r()40 log.sub.10D+L.sub.ref(h.sub.ref,D.sub.ref)L.sub.atmo(h,D) 2. where G.sub.e(),G.sub.r() are respectively the gains of the antenna that are normalized at emission and at reception; e. calculating all of the distances D that, for this pointing distance D.sub.pt, satisfy the relationship K(D)>K.sub.ref so as to obtain the start and the end of the sub-swath actually able to be used by the radar system; and calculating the actually usable sub-swaths that are to be juxtaposed (A, B, C) in order to cover the whole of the area of interest without discontinuities.

Aspects of the present disclosure of may comprise an apparatus of a wireless device configurable for wireless communications and radar operations, the apparatus comprising memory. The apparatus may further comprise processing circuitry coupled to the memory, wherein when configured for the radar operations, the processing circuitry is configured to generate a plurality of scanning signals at different frequencies, configure a transceiver to transmit the scanning signals, configure the transceiver to detect radar return signals corresponding to the scanning signals, the radar return signals to be detected concurrently with transmission of the scanning signals, and configure a radar module to receive the scanning signals and the corresponding radar return signals and determine phase and gain differences between the scanning signals and the corresponding radar return signals.

A seating system for a vehicle includes a vehicle seat, a first Doppler radar sensor positioned within the seatback and aligned with the heart of a person sitting in the seat, a second Doppler radar sensor positioned within the seatback and offset from alignment with the heart, and a controller. The first sensor transmits a signal toward the heart and receives a first reflected signal as modulated by heart movement and by a random motion of the person. The second sensor transmits a signal toward an anatomical location of the person offset from the heart and receives a second reflected signal as modulated by the random motion of the person. The controller generates a biometric signal corresponding to the heart movement, without random motion artifacts, based on a difference between the reflected signals whereby the biometric signal is indicative of cardiac information of the person.

A system and method for planning radar missions. The system includes a processing unit and a display. The method includes estimating the execution time of a plurality of radar tasks to be executed periodically at respective planned repetition rates, and assessing, using rate monotonic scheduling, whether the tasks can be executed at their respective planned repetition rates. The display may be employed to display a graphical representation of a path to be flown repeatedly by the aircraft, and, superimposed on the displayed path, symbols indicating whether at any point on the path the radar will be able to execute each task at its respective planned repetition rate, and whether each of a plurality of areas to be surveyed by the radar, each corresponding to a respective radar task, is in the field of view pattern of the radar.

Techniques that facilitate reconfigurable transmission of a radar frequency signal are provided. In one example, a system includes a signal generator and a power modulator. The signal generator provides a radar waveform signal from a set of radar waveform signals. The power modulator divides a local oscillator signal associated with a first frequency and a first amplitude into a first local oscillator signal and a second local oscillator signal. The power modulator also generates a radio frequency signal associated with a second frequency and a second amplitude based on the radar waveform signal, the first local oscillator signal and the second local oscillator signal.

A system and method for a multi-panel multi-function active electronically scanned array (AESA) radar operation receives radar commands from individual aircraft systems and segments a plurality of AESA panels fixed (at variable azimuth/elevation about the aircraft) into a plurality of subarrays to carry out each individual function commanded by the individual aircraft system. Dependent on aircraft status and phase of flight, the and individual AESA are designated for use and the subarrays are sized based on desired radar function at the specific phase of flight and specific threat associated with the phase. The system dynamically shifts the designated AESA, subarray size, beam characteristics, power settings, and function to enable multiple simultaneous function of the suite of AESA panels.

Generally discussed herein are systems, devices, and methods for generating multi-function waveforms. A device can include input circuitry to receive parameters indicating respective frequencies and codes for the multi-function waveforms, one or more memories to store the respective frequencies and codes, waveform management circuitry configured to produce a series of values based on the frequencies and codes, respectively, and refine the series of values by reducing a cost associated with a waveform produced using the series of values, and a transceiver to generate the waveform.

A seating system for a vehicle includes a vehicle seat, a first Doppler radar sensor positioned within the seatback and aligned with the heart of a person sitting in the seat, a second Doppler radar sensor positioned within the seatback and offset from alignment with the heart, and a controller. The first sensor transmits a signal toward the heart and receives a first reflected signal as modulated by heart movement and by a random motion of the person. The second sensor transmits a signal toward an anatomical location of the person offset from the heart and receives a second reflected signal as modulated by the random motion of the person. The controller generates a biometric signal corresponding to the heart movement, without random motion artifacts, based on a difference between the reflected signals whereby the biometric signal is indicative of cardiac information of the person.

A radar antenna system includes a single transmitter for creating pulses from a wideband waveform. A splitter divides each pulse into half-power pulses, and sends them along respective paths. On one path, successive half-power pulses are alternately modulated with a phase shift .sub.A or .sub.F. On the other path, the half-power pulses are not modulated. Each modulated half-power pulse is then combined with an un-modulated half-power pulse to transmit pulses of a full aperture beam with either .sub.A or .sub.F. This establishes two degrees of freedom for the system. Two separate receivers then simultaneously receive the pulse echoes and a signal processor uses the consequent four degrees of freedom to create a radar indicator with mitigated clutter and useable azimuth estimation. A coherent processing interval can then be selected for multi-mode operation of the system.

A method is provided for correcting radar signal transient variation induced by power amplification in a pulse radar transmitter. The method includes establishing a first plurality of characteristics of a first pulse sequence having a digital pulse; establishing a second plurality of characteristics of a second pulse sequence having a plurality of digital pulses; comparing the first and second pluralities of characteristics to determine a sequence difference; providing pre-distortion coefficients for the plurality of digital pulses corresponding to the signal transient variation in response to the sequence difference; and applying the coefficients to the plurality of digital pulses prior to the power amplification.