公开(公告)号：US11108457B2

公开(公告)日：2021-08-31

申请号：US16704038

申请日：2019-12-05

Applicant: BAE Systems Information and Electronic Systems Integration Inc.

Inventor： Ryan E. Long ,  Thomas R. Vaccaro

IPC: H04B7/08 ,  G01S7/02 ,  H01Q21/00 ,  H01Q3/26

Abstract: A method, system, and computer program are described for identifying the presence of narrowband signals within a wide instantaneous bandwidth by exploiting the spatial diversity of the received signals using an array aperture to provide detection capability. For example, the method includes receiving and channelizing digitized signals into signals with a narrow bandwidth of interest. The method further includes estimating covariance matrices associated with the signals, determining a set of Eigenvalues for the covariance matrices, and analyzing each Eigenvalue to determine a rank change estimate. The method further includes identifying one or more of the signals that have a positive rank change estimate, computing a beam forming weight and direction estimate for each signal that has a positive rank change estimate, and outputting an indication of the signals that have a positive rank change estimate including one or more of fine timing information, the beamforming weights, and the direction estimate.

公开(公告)号：US10887838B1

公开(公告)日：2021-01-05

申请号：US16278649

申请日：2019-02-18

Applicant: BAE Systems Information and Electronic Systems Integration Inc.

Inventor： William H. Alexander ,  Ryan E. Long ,  Joshua L. Petersen

IPC: H04W52/02 ,  H04W8/22 ,  H04K3/00 ,  H04L1/16

Abstract: A system for transmitting a DMR disable signal to a target mobile radio device is provided. The system includes an antenna configured to transmit and receive messages and a base station comprising at least one computing device communicatively coupled to the antenna. The at least one computing device is configured to generate a first message to be transmitted to a target mobile radio device, the first message comprising a disable signal selected from a list of non-standard operational parameters that can be implemented by the target mobile radio device, cause transmission of the first message via the antenna to the target mobile radio device, and monitor incoming messages received via the antenna for an acknowledgement message from the target mobile radio device that the target mobile radio device has been disabled.

公开(公告)号：US20250070835A1

公开(公告)日：2025-02-27

申请号：US18455264

申请日：2023-08-24

Applicant: BAE SYSTEMS Information and Electronic Systems Integration Inc.

Inventor： Ryan E. Long ,  Christopher M. Muller

IPC: H04B7/06 ,  G01S3/14

Abstract: Techniques are provided for steering vector generation. A methodology implementing the techniques according to an embodiment includes converting time domain data received from an antenna array to channelized frequency domain data. The method also includes receiving a request from a signal detection system, the request including a timestamp and duration of a detected signal of interest (SOI) and an indication that the SOI is pulsed or continuous. The method further includes generating, for a pulsed SOI, steering vectors to steer the antenna array to the pulsed SOI based on a segment of the time domain data stored in a first memory and identified by the time stamp and duration; and generating, for a continuous SOI, steering vectors to steer the antenna array to the continuous SOI based on a segment of the channelized frequency domain data stored in a second memory and identified by the time stamp and duration.

公开(公告)号：US20210175956A1

公开(公告)日：2021-06-10

申请号：US16704038

申请日：2019-12-05

Applicant: BAE Systems Information and Electronic Systems Integration Inc.

Inventor： Ryan E. Long ,  Thomas R. Vaccaro

IPC: H04B7/08 ,  H01Q3/26 ,  H01Q21/00 ,  G01S7/02

Abstract: A method, system, and computer program are described for identifying the presence of narrowband signals within a wide instantaneous bandwidth by exploiting the spatial diversity of the received signals using an array aperture to provide detection capability. For example, the method includes receiving and channelizing digitized signals into signals with a narrow bandwidth of interest. The method further includes estimating covariance matrices associated with the signals, determining a set of Eigenvalues for the covariance matrices, and analyzing each Eigenvalue to determine a rank change estimate. The method further includes identifying one or more of the signals that have a positive rank change estimate, computing a beam forming weight and direction estimate for each signal that has a positive rank change estimate, and outputting an indication of the signals that have a positive rank change estimate including one or more of fine timing information, the beamforming weights, and the direction estimate.