公开(公告)号：US11448752B2

公开(公告)日：2022-09-20

申请号：US17092387

申请日：2020-11-09

Applicant: Axis AB

Inventor： Johan Wennersten ,  Adham Sakhnini

IPC: G01S13/89 ,  G01S7/35

Abstract: A method for producing an interference reduced radar image comprises receiving a measured sequence of beat signals; identifying one or more interference segments within the measured sequence of beat signals, an interference segment being a segment subject to an interference; doctoring the measured sequence of beat signals by creating a doctored representation of the measured sequence of beat signals in the form of a matrix Y; creating a doctoring mask representing the doctoring of the measured sequence of beat signals, the doctoring mask being a matrix M; and estimating a reconstructed range-doppler image {circumflex over (X)} from Y and M, wherein the reconstructed range-doppler image is a range-doppler image of Y which is deconvolved using M; such that doctoring the measured sequence of beat signals at least partially removes interference effects and estimating a reconstructed range-doppler image at least partially removes image artefacts created by the doctoring.

公开(公告)号：US11630183B2

公开(公告)日：2023-04-18

申请号：US17216749

申请日：2021-03-30

Applicant: Axis AB

Inventor： Adham Sakhnini ,  Andreas Glatz ,  Axel Landgren ,  Mattias Simonsson ,  Anders Skoog ,  Anders Mannesson ,  Sebastian Heunisch ,  Stefan Adalbjörnsson ,  Karl Nordin

IPC: G01S13/87 ,  G01S7/02 ,  G01S7/35

Abstract: A method for interference reduction between radar units. The method is performed by a radar unit and comprises: receiving one or more radar frames, wherein the one or more radar frames correspond to one or more respective time intervals during which the radar unit was activated to transmit and receive signals to produce data samples of the one or more radar frames; and determining whether the one or more radar frames have a higher presence of data samples that are subject to interference from other radar units in a first half of their corresponding time intervals than in a second, later, half of their corresponding time intervals. In case the presence is higher in the first half of their corresponding time intervals, a scheduled time interval of an upcoming radar frame to be produced by the radar unit is postponed, and otherwise it is advanced.