Systems and methods for radio frequency transmission source detection

    公开(公告)号:US11997485B2

    公开(公告)日:2024-05-28

    申请号:US18285164

    申请日:2022-03-18

    CPC classification number: H04W12/06 H04W12/79

    Abstract: This disclosure provides systems, methods, and apparatus for determining whether an incident radio-frequency (RF) signal is from a known transmission source based on a match between a signature of the incident RF signal and at least one stored signature. One or more antennas can generate a plurality of electrical signals corresponding to a portion of a pulse of the incident RF signal. At least one of amplitude or phase values of a first electrical signal and phase coherent second electrical signal can be determined in the frequency domain. The signature of the incident RF signal based on at least one of amplitude or phase values of the first and the second electrical signals can be determined. This signature can be compared with stored signatures to determine whether the incident RF signal is from a known transmission source.

    Early link detection based adaptive selection of receive parameters

    公开(公告)号:US11362776B2

    公开(公告)日:2022-06-14

    申请号:US16670761

    申请日:2019-10-31

    Abstract: An example method may include receiving a pre-payload portion of a packet at a receiver node. A link associated with a sender node of the packet may be identified based on the pre-payload portion. One or more baseband receive parameters associated with the identified link may be selected and loaded at the receiver node. A payload of the packet may be received at the receiver node using the selected baseband receive parameters. Another example method may include detecting arrival of a packet at a receiver node by detecting OTA energy using at least one of multiple antenna sectors. One or more RF receive parameters of the receiver node may be selected based on information included in or determined from the pre-payload portion of the packet. A payload of the packet may be received at the receiver node using the selected RF receive parameters of the receiver node.

    ENCRYPTION METHOD
    9.
    发明申请

    公开(公告)号:US20210377014A1

    公开(公告)日:2021-12-02

    申请号:US17286643

    申请日:2019-10-21

    Abstract: Disclosed is a method of encrypting a data signal for providing to an input of a radio frequency transmitter, such as modulated baseband signals in the physical layer for wireless transmission. The method comprises receiving the data signal comprising one or more first frequency components with a first phase profile in a frequency band of interest; applying a dispersive encrypting signal filter to the data signal to generate an encrypted data signal comprising the one or more frequency components with a second phase profile, wherein the second phase profile is different to the first phase profile. Decryption is achieved by applying a decrypting filter to the encrypted data signal to substantially reverse the effect of the encrypting filter and recover the first phase profile.

    Smart security camera with detection of suspicious cellphones

    公开(公告)号:US12231831B2

    公开(公告)日:2025-02-18

    申请号:US18748055

    申请日:2024-06-19

    Abstract: A home security camera system captures a picture of a visitor and detects information about the visitor's smartphone, thereby providing a two-part digital ID of the visitor. The two-part ID is particularly useful to law enforcement when the picture portion of the ID happens to be blurry or obstructed. In some examples, a packet scanner sniffs probe requests transmitted by the visitor's phone. The packet scanner can be an integral part of the camera or sold separately. To comply with privacy regulations and bypass obfuscation efforts, the system analyzes various characteristics (e.g., data content and arrangement) of the phone's probe requests, rather than having to discover the true MAC address. The system can notify a resident when a particular friend, mail carrier, or porch pirate returns. The system can share collected digital IDs with other community members to provide neighbors with advanced warnings when certain visitors are in the area.

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