Kenneth Ranney’s research while affiliated with Army Research Laboratory and other places

... In effect, this convolution produces a 7-frame moving average, which removes the frame-to-frame fluctuations that are primarily caused by changes in microscope focus or alterations in Z-stack selections. 18 To determine whether convolution affected the quantitative metrics used to screen for vomocytosis events, the fluorescence range and minimum derivative value were calculated for both the raw and convolved data. ...

Reference:

An Image Processing Algorithm for Facile and Reproducible Quantification of Vomocytosis

... In addition, the LRS/URS PRI T , their pulse durations, i.e., t L and t U , and overlapped signal duration t o are also needed for the subsequent IRS reflection design, which, if not a priori known, can be estimated based on e.g, the deinterleaving approach [37], [38]. Specifically, the autocorrelation-based method and specialized finite impulse response filter can be utilized to extract different PRIs [37] and pulse durations [39], [40], respectively, and then these estimated parameters are compared with their known values stored for LRS to identify those corresponding to URS, which also helps identify the previously estimated AoAs belonging to LRS or URS. Finally, the received signal powers at IRS from LRS/URS, i.e., Q LS and Q U S , are also required for the design of IRS reflection, which can be measured from the received signals at IRS sensors after resolving the LRS/URS AoAs by e.g., the power gain estimation method [41], even when there is signal overlap at the IRS from both LRS and URS (i.e., Case 3) [42]. ...

Reference:

Target-Mounted Intelligent Reflecting Surface for Secure Wireless Sensing

... Since natural linear scatterer and responses from other non-electronic objects do not produce nonlinear responses, it is possible to eliminate the linear response and only receive the desired nonlinear response from electronic devices. This allows for the effective detection of small electronic targets that would otherwise be difficult to achieve with linear radars [5][6][7][8][9][10][11][12]. Nonlinear radars can be utilized in various applications. ...

Reference:

Detection of Electronic Devices Using FMCW Nonlinear Radar

... Recent papers were published that focuses on different radar system techniques, in [3] different signal processing approaches were simulated and presented by a software-defined radar (SDR), along with an overview of how SDRs are used to implement baseline radar functionality. All of these techniques were applied to the MTI issue, and examples of several signatures of moving target were displayed. ...

Reference:

Simulation of Moving Target Indication Radar System Based on VisSim/Comm Application

... That is, they can be programmed to transmit specific waveforms, and process them in an appropriate manner upon reception. In a sister paper at this conference [6], we describe an SDR-based radar system that builds upon work previously performed at the Army Research Laboratory (ARL) [7,8]. A detailed description of the SDRs and their configuration for use as software defined radars is included in that paper and its references. ...

Reference:

Software-defined radar: recent experiments and results

... To effectively capitalize on available spectral resources without interfering with other frequency-overlaid systems, the cognitive radar paradigm is recognized within the radar community as a highly promising solution [8]- [13]. It leverages the use of a sensing module to gain awareness of the actual spectrum allocation and exploits the gathered information to synthesize radar probing waveforms tailored to the observed interference environment [14]- [31]. ...

Reference:

Assessing Radar Waveforms for Spectral Coexistence via the PARSAX System

... With these limitations, vision-only methods still perform insufficiently in unstructured scenes. In situations where lighting conditions are far from ideal (Yi et al., 2022), unexpected obstructions happen (Phelan et al., 2017), or complex interactions with the target are needed , indirect measurements like vision are likely to be inadequate, which often lead to task failures. ...

Reference:

Vahagn: VisuAl Haptic Attention Gate Net for slip detection

... However, T. Berger does not provide relevant experimental verification. Gallagher [15] and Gallagher et al. [16], [17], [18], and [19] used linear/nonlinear radar to acquire data in an approximate 3 × 5 m imaging region and obtained SAR images of linear and nonlinear targets using the back projection algorithm (BPA). The experimental results demonstrate that harmonic radar can generate SAR images. ...

Reference:

A Spatial Variation Compensation Imaging Algorithm for Harmonic SAR

... In recent years, along with intense confrontation degree of Modern electronic warfare (MEW) unceasingly escalating, electronic signals have become more and more complex [1][2][3][4] , Frequency-agility (FA) and Pulse repetition frequency jittering (PRFJ) signal (FA-PRFJ signal) is one of them [5][6][7] . Because of its excellent anti-interference performance, lowinterception probability and inherent security features [5] , FA-PRFJ signal has been widely used in the emitters of many high-value civilian and military targets, such as the radar equipped in hypersonic aircraft [8] . ...

Reference:

Coherent Integration Algorithm for Frequency‐Agile and PRF‐Jittering Signals in Passive Localization

... In response, nonlinear detection techniques that exploit harmonic characteristics arising from the inherent nonlinearity in the current-voltage (I-V) curves of electronic components (e.g., diodes, transistors) have recently attracted significant attention [12], [13], [14], [15]. Radar systems that transmit at a fundamental frequency and receive at a harmonic frequency to acquire such responses are referred to as nonlinear radars. ...

Reference:

Fully Digital Phased Array Harmonic Radar for Detecting Concealed Electronic Devices