Digital frequency modulated continuous wave radar using handcrafted constant envelope modulation

    公开(公告)号:US09945935B2

    公开(公告)日:2018-04-17

    申请号:US15492159

    申请日:2017-04-20

    Applicant: UHNDER, INC.

    Abstract: A radar system for a vehicle includes a transmitter and a receiver. The transmitter transmits an amplified and frequency modulated radio signal. Each transmitter comprises a frequency generator, a code generator, a modulator, a constant-envelope power amplifier, and an antenna. The frequency generator generates the radio signal with a desired center frequency. The code generator generates a sequence of chips at a selected chiprate. A modulation interval between successive chips is a reciprocal of the chiprate. The modulator frequency modulates the radio signal using shaped frequency pulses. The shaped frequency pulses correspond to a first signal, the frequency of which deviates from the desired center frequency during each of the modulation intervals according to a selected pulse shape. The selected pulse shape is determined by the generated sequence of chips. The constant-envelope power amplifier amplifies the frequency modulated radio signal at a desired transmit power level. The antenna transmits the radio signal.

    TWO-WAY CODED APERTURE THREE-DIMENSIONAL RADAR IMAGING

    公开(公告)号:US20170131399A1

    公开(公告)日:2017-05-11

    申请号:US14937394

    申请日:2015-11-10

    Abstract: A two-way coded aperture radar imaging system is disclosed. The system includes an antenna reflector and a radar signal transceiver configured to generate sequential radar transmission signals and receive a plurality of respective reflected radar signals. The system also includes a phase control component configured to phase-encode the sequential radar transmission signals via a plurality of phase-codes to generate a respective plurality of phase-coded radar pulses that are concurrently reflected at a respective plurality of sub-aperture portions of the antenna reflector to concurrently transmit the plurality of phase-coded radar pulses from the antenna reflector to a target. The transmitted phase-coded radar pulses can be reflected from the target as the respective plurality of reflected radar signals. The system further includes a sub-aperture radar controller configured to integrate the plurality of reflected radar signals and to generate a three-dimensional image of the target from the integrated plurality of reflected radar signals.

    PROGRAMMABLE APPARATUS FOR SYNTHESIZED FILTER NOTCH
    39.
    发明申请
    PROGRAMMABLE APPARATUS FOR SYNTHESIZED FILTER NOTCH 审中-公开
    用于合成过滤器的可编程设备

    公开(公告)号:US20170045608A1

    公开(公告)日:2017-02-16

    申请号:US14823462

    申请日:2015-08-11

    CPC classification number: G01S7/38 G01S7/023 G01S7/282 G01S13/26 H04K3/28 H04K3/42

    Abstract: Generally discussed herein are systems, apparatuses, and methods for generating a replica of a first signal with a notch at one or more desired frequencies. In an example, an apparatus can include a pulse cataloger configured to analyze the first signal and to provide phase modulation information about the first signal, a direct digital synthesizer having an output and configured to modulate a second signal using the phase modulation information and to provide the second signal at the output. The second signal can include a representation of the first signal with a frequency notch at a particular center frequency within the bandwidth of the second signal.

    Abstract translation: 这里通常讨论的是用于产生具有一个或多个所需频率的陷波的第一信号的副本的系统,装置和方法。 在一个示例中,设备可以包括:脉冲编目器,被配置为分析第一信号并提供关于第一信号的相位调制信息;直接数字合成器,其具有输出并被配置为使用相位调制信息来调制第二信号,并提供 输出端的第二个信号。 第二信号可以包括具有在第二信号的带宽内的特定中心频率处的频率陷波的第一信号的表示。

    Amplification phase correction in a pulse burst
    40.
    发明授权
    Amplification phase correction in a pulse burst 有权
    脉冲脉冲串中的放大相位校正

    公开(公告)号:US09479122B2

    公开(公告)日:2016-10-25

    申请号:US14471568

    申请日:2014-08-28

    Inventor: Chang Ru Zhu

    Abstract: An apparatus having an amplifier and a correction circuit is disclosed. The amplifier may be configured to amplify an intermediate signal to generate an output signal. The amplifier is generally a microwave frequency power amplifier. The correction circuit may be configured to (i) generate a control signal based on a plurality of characteristics of the amplifier, and (ii) adjust a plurality of phases of a plurality of pulses in a pulse burst to generate the intermediate signal. The adjusting may be in response to the control signal. The pulse burst is generally received in an input signal. The phases of the pulses as adjusted in the intermediate signal generally cancel a plurality of phase errors induced by the amplifier in the pulses.

    Abstract translation: 公开了一种具有放大器和校正电路的装置。 放大器可以被配置为放大中间信号以产生输出信号。 放大器通常是微波频率功率放大器。 校正电路可以被配置为(i)基于放大器的多个特性产生控制信号,以及(ii)调整脉冲串中的多个脉冲的多个相位以产生中间信号。 调整可以响应于控制信号。 通常在输入信号中接收脉冲串。 在中间信号中调节的脉冲的相位通常消除由脉冲中的放大器感应的多个相位误差。

Patent Agency Ranking