公开(公告)号：US20240142568A1

公开(公告)日：2024-05-02

申请号：US18281126

申请日：2021-03-11

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Magnus Sandgren ,  Ashkan Kalantari ,  Andres Reial ,  Gang Zou ,  Henrik Sjöland

IPC: G01S7/02 ,  G01S7/03 ,  G01S13/22 ,  G01S13/526 ,  H04L5/14

CPC classification number: G01S7/0235 ,  G01S7/034 ,  G01S13/225 ,  G01S13/526 ,  H04L5/1469

Abstract: A radar sensing function is performed in a mobile communication device that operates in a Time Division Duplex (TDD) wireless communication system having an air interface that comprises a plurality of uplink symbol times associated with symbols transmitted in an uplink direction and a plurality of downlink symbol times associated with symbols transmitted in a downlink direction, and in which each transmitted symbol from a plurality of transmitted symbols has a corresponding cyclic prefix that is transmitted immediately before the corresponding transmitted symbol, and that is a repetition of an end part of the corresponding transmitted symbol. Information about a path delay between the mobile communication device and a receiver is used as one of one or more bases to determine a timing of a radar operation window having a duration that is shorter than a duration of a cyclic reception window of the receiver and comprising a radar signal transmission time and a radar backscatter reception period. The determined timing of the radar operation window is configured to cause the radar signal, when transmitted from the mobile communication device at the determined radar signal transmission time, to arrive at the receiver during a portion of the cyclic prefix reception window of the receiver. The radar signal is transmitted at the determined time.

公开(公告)号：US20230314591A1

公开(公告)日：2023-10-05

申请号：US17657310

申请日：2022-03-30

Applicant: QUALCOMM Incorporated

Inventor： Hyojin LEE ,  Weimin DUAN ,  June NAMGOONG

IPC: G01S13/86 ,  G01S13/58 ,  G01S13/22

CPC classification number: G01S13/86 ,  G01S13/581 ,  G01S13/225

Abstract: Certain aspects of the present disclosure provide techniques for joint communication and radar sensing. A method is provided for wireless communications by a network entity. The method generally includes communicating one or more radar signals in a first set of slots. Each of the first set of slots comprises an extended cyclic prefix have a first length. The method generally includes communicating one or more signals in a second set of slots, each of the second set of slots comprising a normal cyclic prefix having a second length that is shorter than the first length.

公开(公告)号：US09864049B2

公开(公告)日：2018-01-09

申请号：US14735548

申请日：2015-06-10

Applicant: STMICROELECTRONICS (GRENOBLE 2) SAS

Inventor： Pascal Mellot

IPC: G01S7/486 ,  G01S17/10 ,  G01S7/484 ,  G01S13/22

CPC classification number: G01S7/4865 ,  G01S7/484 ,  G01S7/4868 ,  G01S13/225 ,  G01S17/10

Abstract: A method of measuring the phase of a response signal relative to a periodic excitation signal, comprises the steps of producing for each cycle of the response signal two transitions synchronized to a clock and framing a reference point of the cycle; swapping the two transitions to confront them in turns to the cycles of the response signal; measuring the offsets of the confronted transitions relative to the respective reference points of the cycles; performing a delta-sigma modulation of the swapping rate of the two transitions based on the successive offsets; and producing a phase measurement based on the duty cycle of the swapping rate.

公开(公告)号：US20160245908A1

公开(公告)日：2016-08-25

申请号：US15048138

申请日：2016-02-19

Applicant: Furuno Electric Co., Ltd.

Inventor： Akinori Shimizu

IPC: G01S13/30 ,  G01S13/89 ,  G01S13/28

CPC classification number: G01S13/30 ,  G01S13/106 ,  G01S13/225 ,  G01S13/227 ,  G01S13/28 ,  G01S13/282 ,  G01S13/89

Abstract: A radar apparatus is provided. The radar apparatus includes a transmission and reception unit configured to transmit a close distance pulse signal, a medium distance pulse signal, and a far distance pulse signal in an order of the close distance pulse signal, the far distance pulse signal, the medium distance pulse signal, and then the far distance pulse signal, and receive reflection waves of the transmitted pulse signals, the far distance pulse signal having a wider pulse width than the close distance pulse signal, the medium distance pulse signal having a pulse width wider than the close distance pulse signal and narrower than the far distance pulse signal, and a signal processor configured to generate a radar image by using a first detection result and a second detection result.

Abstract translation: 提供雷达装置。 雷达装置包括发射和接收单元，其被配置为以近距离脉冲信号，远距离脉冲信号，中等距离脉冲的顺序发送近距离脉冲信号，中距离脉冲信号和远距离脉冲信号 信号，然后是远距离脉冲信号，并接收发射脉冲信号的反射波，远距离脉冲信号的脉冲宽度比近距离脉冲信号宽，中距离脉冲信号的脉冲宽度大于闭合 距离脉冲信号，并且比远距离脉冲信号窄;以及信号处理器，被配置为通过使用第一检测结果和第二检测结果来生成雷达图像。

公开(公告)号：US20100214157A1

公开(公告)日：2010-08-26

申请号：US12380324

申请日：2009-02-26

Applicant: Thomas Edward McEwan

Inventor： Thomas Edward McEwan

IPC: G01S7/40

CPC classification number: G01S13/89 ,  G01S13/0209 ,  G01S13/18 ,  G01S13/225 ,  G01S13/62

Abstract: Narrow virtual transmit pulses are synthesized by differencing long-duration, staggered pulse repetition interval (PRI) transmit pulses. PRI is staggered at an intermediate frequency IF. Echoes from virtual pulses form IF-modulated interference patterns with a reference wave. Samples of interference patterns are IF-filtered to produce high spatial resolution holographic data. PRI stagger can be very small, e.g., 1-ns, to produce a 1-ns virtual pulse from very long, staggered transmit pulses. Occupied Bandwidth (OBW) can be less than 10 MHz due to long RF pulses needed for holography, while spatial resolution can be very high, corresponding to ultra-wideband (UWB) operation, due to short virtual pulses. X-Y antenna scanning can produce range-gated surface holograms from quadrature data. Multiple range gates can produce stacked-in-range holograms. Motion and vibration can be detected by changes in interference patterns within a range-gated zone.

Abstract translation: 通过差分长持续时间，交错脉冲重复间隔（PRI）发射脉冲来合成窄的虚拟发射脉冲。 PRI在中频IF交错。 来自虚拟脉冲的回波形成具有参考波的IF调制干涉图案。 IF滤波器对干涉图样进行IF滤波，以产生高空间分辨率的全息数据。 PRI交错可以非常小，例如1ns，以从非常长的交错发射脉冲产生1ns虚拟脉冲。 由于全息照相所需的长RF脉冲，占用带宽（OBW）可能小于10MHz，而由于短虚拟脉冲，空间分辨率可能非常高，对应于超宽带（UWB）操作。 X-Y天线扫描可以从正交数据产生范围门控表面全息图。 多范围门可以产生堆积在范围内的全息图。 运动和振动可以通过范围选择区域内的干涉图案的变化来检测。

公开(公告)号：US06803876B2

公开(公告)日：2004-10-12

申请号：US10453892

申请日：2003-06-04

Applicant: Radmila Erkocevic-Pribic

Inventor： Radmila Erkocevic-Pribic

IPC: G01S1300

CPC classification number: G01S7/414 ,  G01S7/288 ,  G01S13/225 ,  G01S13/524

Abstract: This invention relates to radar signal processing. In particular, this invention concerns Doppler processing and clutter filtering on irregular Pulse Repetition Time (PRT) sampled signal. This invention solves the above-mentioned drawbacks, in particular solving the velocity ambiguity and filtering any type of clutter, providing a deconvolution method which filter any kind of clutter even varying clutter like sea clutter, rain clutter . . . The deconvolution method of irregular pulse repetition time sampled signal x(tm), comprises the following steps: [S1] conversion of the irregular samples x(tm) to regular samples r(iT&egr;); [S2] computation of the spectrum dft(r) of these regular samples; [S3] isolation of the clutter spectra in dft(r) by assuming clutter spreads over more than a few range gates; [S4] estimation of the clutter spectral lines from the mean and the width of the isolated clutter spectra; [S5] subtraction of the estimated clutter spectra from the total spectrum dft(r); [S6] deconvolution of the remaining spectra.

Abstract translation: 本发明涉及雷达信号处理。 特别地，本发明涉及对不规则脉冲重复时间（PRT）采样信号的多普勒处理和杂波滤波。本发明解决了上述缺点，特别是解决了速度模糊和滤波任何类型的杂波，提供了一种去卷积方法， 任何种类的杂乱甚至变化的混乱，如海杂，雨杂乱。 。 不规则脉冲重复时间采样信号x（tm）的去卷积方法包括以下步骤：[S1]将不规则样本x（tm）转换为常规样本r（iTepsilon）; [S2]光谱dft（ 这些常规样本的r）; [S3]通过假设杂波扩展在多于几个范围门上的dft（r）中的杂波频谱的分离; [S4]从孤立的平均值和宽度估计杂波谱线 杂波光谱; [S5]从总光谱dft（r）中减去估计的杂波光谱; [S6]剩余光谱的去卷积。

公开(公告)号：US06720910B2

公开(公告)日：2004-04-13

申请号：US09930891

申请日：2001-08-16

Applicant: Kai-Bor Yu

Inventor： Kai-Bor Yu

IPC: G01S1352

CPC classification number: G01S13/4463 ,  G01S13/225 ,  G01S13/449

Abstract: A method, apparatus, and processing system for radar detection and tracking of a target using monopulse ratio processing comprising the following steps. First, receiving a signal comprised of a plurality of sum azimuth beams and difference azimuth beams. Then staggering the received signal. Next, filtering and localizing a clutter signal which is a portion of the received sum and azimuth beams. Then adaptively forming a sub-array sum azimuth beam and a sub-array difference azimuth beam from the filtered output to cancel the clutter. The adaptive beam forming including the determination of a sum and difference beam weight where the adaptive weight be equated to a product of the weight and the respective covariance matrices of the sum and difference beams, the product having no constraint points. Finally, forming a final sum azimuth beam and final difference beam where the first sub array is related to the sum and azimuth beams of a plurality of other sub-array sum and difference beams, an overall final sum beam is formed and is used for target detection. In addition, an overall final difference beam is formed and the ratio of the overall final difference beam to the overall final sum beam is used for angle location determination.

Abstract translation: 一种用于使用单脉冲比率处理的雷达检测和跟踪目标的方法，装置和处理系统，包括以下步骤。 首先，接收由多个和方位角光束和差分方位光束组成的信号。 然后交错接收到的信号。 接下来，对作为接收的和和方位角的一部分的杂波信号进行滤波和定位。 然后自适应地形成子阵列和方位角和来自滤波输出的子阵列差方位角光束以消除杂波。 自适应波束形成包括确定和差和波束权重的确定，其中自适应权重等于权重和乘积和差分波束的各个协方差矩阵的乘积，该乘积不具有约束点。 最后，形成最终和方位波束和最终差分波束，其中第一子阵列与多个其他子阵列和和差分波束的和和波束相关联，形成总体最终和波束并将其用于目标 检测。 另外，形成总体最终差分波束，并且将总体最终差分波束与总体最终和波束的比率用于角度位置确定。

公开(公告)号：US4931800A

公开(公告)日：1990-06-05

申请号：US351004

申请日：1989-05-12

Applicant: Harold R. Ward

Inventor： Harold R. Ward

IPC: G01S7/40 ,  G01S13/22 ,  G01S13/524

CPC classification number: G01S7/4004 ,  G01S13/225 ,  G01S13/5248

Abstract: A moving target detector (MTD) in a radar system uses corrected weighting coefficients to compensate for pulse stagger effect on transmitted pulses. Transmitted pulses are sampled when the radar is switched to a test mode for determining a correction factor which is used to calculate the corrected weighting coefficients. The radar return signals are processed in the MTD by a finite impulse response (FIR) filter using the stored corrected weighting coefficients calculated for each sequence of transmitted pulses including block stagger and pulse stagger sequences.

公开(公告)号：US3566402A

公开(公告)日：1971-02-23

申请号：US3566402D

申请日：1968-11-18

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： TAYLOR JOHN W JR

IPC: G01S13/22 ,  G01S13/528 ,  G01S9/42

CPC classification number: G01S13/225 ,  G01S13/528

Abstract: A VARIABLE INTERPULSE PERIOD SEQUENCE IS USED IN A DIGITAL MTI RADAR SYSTEM WHICH FOLLOWS AN EXPONENTIALLY INCREASING AND/OR DECREASING PATTERN TO REDUCE THE NUMBER OF SETS OF WEIGHTS WHICH MUST BE STORED WITHIN THE

SYSTEM TO ACHIEVE AN OPTIMUM VELOCITY RESPONSE CHARACTERISTIC.

公开(公告)号：US3491360A

公开(公告)日：1970-01-20

申请号：US3491360D

申请日：1968-09-11

Applicant: HOLLANDSE SIGNAALAPPARATEN BV

Inventor： STOORVOGEL WILLEM

IPC: G01S13/22 ,  G01S7/28

CPC classification number: G01S13/225