利索-全球专利检索

  1. Login
  2. Sign Up

Search Results

678 records (took 0.025 seconds)

    Radar apparatus and method with content embedded in the radar signal
    4.
    发明授权
    Radar apparatus and method with content embedded in the radar signal 有权

    公开(公告)号：US12007465B2

    公开(公告)日：2024-06-11

    申请号：US17505434

    申请日：2021-10-19

    Applicant: NXP B.V.

    Inventor： Franz Lampel ,  Alessio Filippi

    IPC: G01S13/00 ,  G01S7/02 ,  G01S7/28 ,  G01S13/34 ,  G01S13/931

    CPC classification number: G01S13/343 ,  G01S7/023 ,  G01S7/2813 ,  G01S13/931

    Abstract: A method and apparatus are provided in which receiver circuitry and signal processing circuitry may reside. The receiver circuitry receives a FMCW radar signal having a content signal (e.g., a random or information signal) embedded into a radar waveform and indicating a relationship in the FMCW radar signal between beat frequency and time delay. The signal processing circuitry may apply a filter (e.g., filtering with a group delay that approximates or relates to the relationship) that causes a residual error in, due to dispersion of, the content signal, and may account for (e.g., mitigate) the residual error by introduction of a dispersion-related function in further processing of the content signal.

    Distance measurement using millimeter wave radar
    7.
    发明授权
    Distance measurement using millimeter wave radar 有权

    公开(公告)号：US11921229B2

    公开(公告)日：2024-03-05

    申请号：US17479002

    申请日：2021-09-20

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Muhammad Zubair Ikram ,  Adeel Ahmad ,  Dan Wang ,  Murtaza Ali

    IPC: G01S13/44 ,  G01S7/35 ,  G01S13/34 ,  G01S13/931

    CPC classification number: G01S7/352 ,  G01S13/34 ,  G01S13/343 ,  G01S13/931

    Abstract: An apparatus, including processing unit (PU) cores and computer readable storage devices storing machine instructions for determining a distance between a target object and a radar sensor circuit. The PU cores receive a beat signal generated by the radar sensor circuit and compensate for a phase difference between the received beat signal and a reconstruction of the received beat signal to obtain a phase compensated beat signal. The phase compensated beat signal is then filtered to remove spurious reflections by demodulating the phase compensated beat signal using an estimated frequency of the phase compensated beat signal. The PU cores then apply a low pass filter to the demodulated phase compensated beat signal, resulting in a modified beat signal. The PU cores then determine the distance between the target object and the radar sensor circuit using the modified beat signal.

    Fast chirp synthesis via segmented frequency shifting
    8.
    发明授权
    Fast chirp synthesis via segmented frequency shifting 有权

    公开(公告)号：US11914022B2

    公开(公告)日：2024-02-27

    申请号：US18132409

    申请日：2023-04-09

    Applicant: AyDeeKay LLC

    Inventor： Tom Heller

    IPC: G01S13/58 ,  G01S13/34 ,  G01S13/534

    CPC classification number: G01S13/584 ,  G01S13/343 ,  G01S13/534

    Abstract: In an illustrative integrated circuit, a chirp generator provides a chirp signal having linearly-ramped chirp intervals, while a shift frequency generator provides a signal having a different shift frequency during each of multiple segments in each chirp interval. A modulator combines the signals to derive a segmented chirp signal having multiple linearly-ramped chirp segments in each chirp interval. The modulator may be a single sideband modulator to provide frequency up-shifted and frequency down-shifted chirp segments. The segmented chirp signal may be suppressed during resettling intervals of the original chirp signal.

    SECURITY ENHANCEMENT FOR MULTI-USER RANGING SYSTEMS USING SIGNATURE ORTHOGONAL CHIRPS
    10.
    发明公开
    SECURITY ENHANCEMENT FOR MULTI-USER RANGING SYSTEMS USING SIGNATURE ORTHOGONAL CHIRPS 审中-公开

    公开(公告)号：US20230375688A1

    公开(公告)日：2023-11-23

    申请号：US17748903

    申请日：2022-05-19

    Applicant: Cypress Semiconductor Corporation

    Inventor： Nozhan HOSSEINI ,  Pouria ZAND ,  Kiran ULN ,  Claudio REY ,  Kambiz SHOARINEJAD

    IPC: G01S13/34 ,  G01S7/40 ,  H04B1/713

    CPC classification number: G01S13/343 ,  G01S7/4056 ,  H04B1/713 ,  H04B2001/6912

    Abstract: Techniques described here introduce signature frequency modulation to unmodulated pulse signals as frequency chirps to enhance the security of multi-carrier phase-based ranging signals. The characteristics of the chirps may be mutually known by an initiator and a desired reflector of the ranging applications. The characteristics of the chirps may vary between the multi-carrier signals to thwart any attempt by an eavesdropper to predict the chirps. In one aspect, the characteristics of the chirps may be calculated for each timeslot of a ranging cycle by two authorized devices using a ciphering algorithm such as the Advanced Encryption Standard (AES) based on a shared security key. Each call of the AES may generate one or more pseudo-random numbers based on the shared security key and a time-varying initialization vector that increments every timeslot. Fields of the pseudo-random number may be extracted to determine the characteristics of the chirps associated with the timeslot.

Patent Agency Ranking