公开(公告)号：US11762058B2

公开(公告)日：2023-09-19

申请号：US17466290

申请日：2021-09-03

Applicant: Signalchip Innovations Private Limited

Inventor： Nikhil Birur Gururaja Rao ,  Himamshu Gopalakrishna Khasnis

IPC: G01S7/288 ,  G01S13/26 ,  G01S7/282

CPC classification number: G01S7/2886 ,  G01S7/282 ,  G01S13/26

Abstract: A radar system for generating a fast frequency hopping output for frequency agility using a transmitter block and a receiver block. The transmitter block is configured to (i) modulate a digital signal using a first digital mixer, (ii) convert a modulated signal into an inphase analog signal and provide the inphase analog signal to at least one of a first RF IQ mixer or a third RF IQ mixer, (iii) convert the modulated signal into a quadrature analog signal provide the quadrature analog signal to at least one of the first RF IQ mixer or the third RF IQ mixer, and (iv) generate the fast frequency hopping output radar signal by mixing the inphase analog signal and the quadrature analog signal with an inphase RF local oscillator signal and a quadrature RF local oscillator signal.

公开(公告)号：US11953582B2

公开(公告)日：2024-04-09

申请号：US17123227

申请日：2020-12-16

Applicant: INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY

Inventor： Tae Wook Kim ,  Sung Young Lee

IPC: G01S13/34 ,  G01S7/288 ,  G01S13/10 ,  G01S13/50 ,  G04F10/00

CPC classification number: G01S13/346 ,  G01S13/10 ,  G01S13/50 ,  G04F10/005 ,  G01S7/2886

Abstract: A distance measuring apparatus includes: a DTC generator unit that generates DTC signals having edges delayed to define time segments; a template generator unit that generates template signals consecutively in a pre-designated number within the time segments in response to the DTC signals; a coarse time determiner unit that determines the time segment in which a delayed signal is received by calculating correlations with the consecutively generated template signals; a fine time measurer unit that determines the time at which the delayed signal is received within the time segment determined at the coarse time determiner unit from the results of calculating correlations between multiple template signals within the determined time segment and the delayed signal; and a distance calculator unit that calculates the total delay duration of the delayed signal and calculates the distance to the measurement target object from the calculated delay duration.

公开(公告)号：US11808834B2

公开(公告)日：2023-11-07

申请号：US17101040

申请日：2020-11-23

Applicant: NATIONAL SUN YAT-SEN UNIVERSITY

Inventor： Tzyy-Sheng Horng ,  Chao-Kai Wen ,  Yi-Chen Lai ,  Yu-Chi Huang ,  Jui-Yen Lin ,  De-Ming Chian

IPC: G01S13/02 ,  H01Q21/00 ,  G01S7/40 ,  G01S7/288

CPC classification number: G01S13/02 ,  G01S7/4052 ,  H01Q21/0025 ,  G01S7/2886 ,  G01S7/4069 ,  G01S2013/0254

Abstract: A phased-array Doppler radar includes a two-way splitter, a transmit antenna, a receive antenna array, an ILO, a demodulation unit and a digital signal processing unit. A reference signal is split by the two-way splitter to the transmit antenna for transmission to targets and the ILO for injection locking. Signals reflected by the targets are received by the receive antenna array as received signals. An injection-locked signal generated by the ILO and the received signals received by the receive antenna array are delivered to the demodulation unit. The received signals are demodulated into baseband I/Q signals by the demodulation unit that uses the injection-locked signal as a local oscillator signal. The baseband I/Q signals are processed by the digital signal processing unit to obtain a digital beamforming pattern.

公开(公告)号：US20240319336A1

公开(公告)日：2024-09-26

申请号：US17747725

申请日：2022-05-18

Applicant: VIETTEL GROUP

Inventor： Van Long Do ,  Tran Minh Nguyen ,  Van Tho Nguyen ,  Anh Hung Hoang ,  Trung Duc Dang ,  Thai Binh Nguyen ,  Manh Linh Nguyen

IPC: G01S7/41 ,  G01S7/288 ,  G01S7/292 ,  G01S7/35

CPC classification number: G01S7/414 ,  G01S7/2886 ,  G01S7/2925 ,  G01S7/354

Abstract: Radar signal detection and parameter estimation is central in passive surveillance systems, providing inputs for many information processing modules in order to detect, localize, indentify and intercept hostile targets. The proposed method for detecting radar signals and estimating their intra-pulse parameters in time-varying noisy environments consists of several stages: magnitude-squared envelopes calculation, adaptive noise floor estimation, detection statistics calculation, rising edge detection, time of arrival estimation, falling edge detection, time of departure estimation, pulse width estimation, amplitude estimation and center frequency and bandwidth estimation. Estimated intra-pulse parameters are wrapped into pulse descriptor words (PDWs) for information processing tasks, where each PDW consists of time of arrival, time of departure, pulse width, pulse amplitude, center frequency, signal bandwidth, noise floor level and additional useful information. The method is sequential, implemented in hardware platforms for real-time surveillance applications. The proposed method yielded much better performance than classical threshold-based edge (TED) detection methods.

公开(公告)号：US20240310479A1

公开(公告)日：2024-09-19

申请号：US18280110

申请日：2022-02-23

Applicant: Continental Automotive Technologies GmbH

Inventor： Lars Weisgerber ,  Mario Schuehler

IPC: G01S7/288 ,  G01S13/02 ,  G01S13/58 ,  H04L25/02

CPC classification number: G01S7/2886 ,  G01S7/2883 ,  G01S13/0209 ,  G01S13/582 ,  H04L25/0212

Abstract: An ultra-wideband sensor transmits impulse radio signals at different times and generates respective channel impulse responses that describe a respective reflected signal as a function of a path delay. The channel impulse responses are used to generate a time-variant channel impulse response in which the channel impulse responses are arranged according to the times of transmission of the respective associated impulse radio signals. At least one respective local maximum of the scatter function quantity, characterized by a respective Doppler frequency and a respective path delay, is detected in scatter functions of respective time windows. A predetermined selection method is used to select at least one local maximum as the respective observation maximum to be tracked for motion detection. A signal characteristic of the channel impulse response is generated for the respective observation maximum to be tracked and a predetermined motion detection method detects at least one predetermined movement.