公开(公告)号：US20250119230A1

公开(公告)日：2025-04-10

申请号：US18378064

申请日：2023-10-09

Applicant: NXP B.V.

Inventor： Erik Kraft ,  Stefan LEMSITZER ,  Marcel MEDWED ,  Pablo CORBALÁN PELEGRIN ,  Tobias SCHNEIDER

IPC: H04K3/00 ,  G06F7/58 ,  H04B1/7183 ,  H04B1/719

Abstract: A device includes a first radio controller configured to communicate using a first protocol, and a pseudo random number generator configured to generate a pseudo random output value based on an input data value. The device includes a processor configured to determine a preamble code based on an output of the pseudo random number generator, and process a data packet received using the first radio controller using the preamble code to generate a processed data packet.

公开(公告)号：US20240192307A1

公开(公告)日：2024-06-13

申请号：US18079473

申请日：2022-12-12

Applicant: NXP B.V.

Inventor： Eduardo Pimentel de Alvarenga ,  Marcel Medwed ,  Tobias Schneider ,  Erik Kraft

IPC: G01S5/14

CPC classification number: G01S5/14

Abstract: In an ultra-wideband (UWB) communication network, a controller anchor changes which anchor of a group of anchors serves as initiator for each of multiple ranging rounds. Based on the capabilities of the anchors in the UWB communication network, the controller selects among multiple modes for designating which anchor serves as initiator for each ranging round. In a first mode, the anchors take turns serving as the initiator for successive ranging rounds in round robin fashion. In a second mode, the anchors randomly take turns serving as the initiator for ranging rounds. By dynamically selecting an initiator for each ranging round, launching a successful jamming attack becomes significantly more complicated.

公开(公告)号：US20250053639A1

公开(公告)日：2025-02-13

申请号：US18366727

申请日：2023-08-08

Applicant: NXP B.V.

Inventor： Marcel Medwed ,  Erik Kraft ,  Jan Hoogerbrugge ,  Tobias Schneider

IPC: G06F21/52 ,  G06F21/60

Abstract: A method is provided to protect a stack of return addresses from manipulation. The return address indicates where to return in a computer program after a subroutine is called. In the method, an encryption key and an initial tweak value is selected. For a return address to be stored on the stack, a first chained address is generated by encrypting the return address with the encryption key and the initial tweak value. The first chained address is provided to the stack instead of the return address. For a subsequent return address that is subsequent to the return address, a second chained address is generated by encrypting the subsequent return address with the encryption key and the first chained address. The second chained address is provided to the stack instead of the subsequent return address. The method provides effective protection without requiring additional memory in a memory limited system.

公开(公告)号：US20240118380A1

公开(公告)日：2024-04-11

申请号：US17938430

申请日：2022-10-06

Applicant: NXP B.V.

Inventor： Tobias Schneider ,  Eduardo Pimentel de Alvarenga ,  Marcel Medwed ,  Erik Kraft ,  Stefan Lemsitzer ,  Robert Spreitzer

IPC: G01S7/02

CPC classification number: G01S7/023

Abstract: A method is provided for detecting interference in a radar system. The method includes transmitting, by a transmitter of the radar system, a sequence of radar pulses at a regular interval with a rest period following each radar pulse of the sequence of radar pulses. The transmitter is disabled during each rest period. A receiver is enabled to receive reflected radar pulses from a target during the rest period following each radar pulse of the sequence of radar pulses. Some of the radar pulses are selected to be omitted and not transmitted. The receiver is still enabled during the rest periods following the omitted transmission pulses. Any reflected pulses received during the rest periods following the omitted transmission pulses may be an indication of a targeted interference of the radar system. In another embodiment, a radar system is provided.