System and method for mitigating narrowband interference

    公开(公告)号:US10263727B2

    公开(公告)日:2019-04-16

    申请号:US15477429

    申请日:2017-04-03

    Inventor: Frank Hudson

    Abstract: A system and method for mitigating interference of a radio frequency (RF) signal includes a receiver configured to include: a decomposition module that decomposes a received RF signal into sub-bands via a multi-stage filter, each sub-band being configured to operate on real and imaginary components of the RF signal, and each stage being scaled for separating time-frequency content of the desired signal from time-frequency content of the interference; a mitigation module that suppresses the interference of the RF signal in each sub-band by zeroing an output of a respective sub-band when the frequency content exceeds a predetermined threshold; and a reconstruction module that reconstructs the RF signal from the mitigation module minus the interference. The receiver is configured to determine whether the multi-stage filter is to be reinitialized with updated time and frequency resolution requirements to improve system response.

    VEHICLE GUIDANCE SYSTEM AND METHOD THAT USES AIR DATA FROM SURFACE-MOUNTED PRESSURE SENSORS FOR VEHICLE ORIENTATION CONTROL

    公开(公告)号:US20170329350A1

    公开(公告)日:2017-11-16

    申请号:US15155673

    申请日:2016-05-16

    CPC classification number: G05D1/0808 B64C13/18 B64D43/02 G01L19/0084

    Abstract: A vehicle guidance system, including: surface-mounted pressure sensors mounted on a vehicle; an air data estimation controller including: a preprocessor that sets initial values for angle of attack and sideslip angle, determines a converged value for the angle of attack using the initial values and values of one or more first sets of three sensors, each first set of sensors are located among three different planes that are parallel to the ground, and provides a converged sideslip angle value based on the converged value and values of one or more second sets of three sensors, each second set of sensors located among three different planes that are perpendicular to the ground; a processor that estimates air data based on the converged value for the angle of attack and the converged sideslip angle value; and processor that provides an output for adjusting orientation of a vehicle based on the air data.

    SERVICE MIDDLEWARE FOR MOBILE USER OBJECT SYSTEM (MUOS) GROUP DATA DISSEMINATION

    公开(公告)号:US20250142296A1

    公开(公告)日:2025-05-01

    申请号:US18930602

    申请日:2024-10-29

    Abstract: Methods performed by a host platform operable in a Mobile User Objective System (MUOS) network are provided herein. A method according to some examples may include monitoring for outgoing data from a client, parsing the outgoing data to determine a priority level associated with the outgoing data, and queuing the outgoing data based on the priority level. Some methods may include monitoring for Secure Network Management Protocol (SNMP) traps to determine a floor status associated with an over-the-air interface. In some methods, if an SNMP trap is received indicating that the floor status associated with the over-the air interface is available, the queued outgoing data may be forwarded to a terminal for transmission via the over-the-air interface.

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