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    • 11. 发明公开
    • Composite pulse radar system having means for eliminating interference between pulses
    • 雷达装置用复合脉冲,并且用于抑制脉冲之间的干扰的装置。
    • EP0184424A2
    • 1986-06-11
    • EP85308782.3
    • 1985-12-03
    • NEC CORPORATION
    • Matsuda, ShojiIsobe, Eiji
    • G01S13/30G01S13/20
    • G01S13/30
    • A composite pulse radar has a composite pulse generator (7) generating cycles of short and long pulses with varying intervals between the short and iong pulses. The pulses are transmitted through a transmitter (8) coupled between the generator (7) and a radar antenna (9). The respective echo pulses from near and distant targets are coupled from the antenna (9) through a long pulse receiver (11) and a short pulse receiver (10) to processing section (6) which combines the short and long pulse video signals and eliminates asynchronous interference caused by reflection of the short pulses from distant targets. The section (6) includes a correlator (63) which correlates a plurality of the combined signals for a plurality of successive cycles of pulse transmission.
    • 一种复合脉冲雷达具有生成短和长脉冲的周期与短和长脉冲之间变化的间隔的复合脉冲发生器(7)。 的脉冲是反式mitted通过发射机(8)(8),其耦合所述发电机(7)和一个雷达天线之间。 由近及远的目标respectivement回波脉冲从天线(9)通过一个长脉冲接收器(11)和短脉冲的接收器(10),处理单元耦合(6)结合为特征的短期和长期的脉冲视频信号,并消除 异步干扰通过从远处目标的短脉冲的反射而引起的。 的部分(6)包括一个相关器(63),其中用于传输脉冲的连续周期的多元性相关组合信号的复数。
    • 12. 发明公开
    • Radar, sonar and similar systems
    • 雷达,声纳和系统。
    • EP0049087A1
    • 1982-04-07
    • EP81304344.5
    • 1981-09-22
    • THE MARCONI COMPANY LIMITED
    • Rouse, David George
    • G01S13/10G01S13/30
    • G01S13/30G01S13/106
    • A transmitter (2) generating a train of pulses arranged in groups of two, each group including a long pulse and a short pulse of different frequencies. These long and short pulses are separated in a receiver (3) by a range gate (12) which passes the pulses through the upper receiving channel when reflected from long ranges and the lower receiving channel when received from short ranges. The upper channel includes a filter (19) which passes only the long pulses (which are frequency swept). These pulses are compressed in a compressor network (20).
      The lower channel includes a filter (15) which passes only the short pulses which, in this particular embodiment, are not frequency-swept. The transmitter (2) reverses the order of the pulses in adjacent groups. Alternatively, both the long and short pulses may all be frequency-swept. In either event there are adjacent pairs of swept pulses in contrast to known systems in which each swept pulse has immediately been preceded or followed by an unswept pulse.
    • 一种发射机(2),其产生以两组分组布置的脉冲串,每组包括长脉冲和不同频率的短脉冲。 这些长脉冲和短脉冲在接收器(3)中被距离门(12)分开,当从远距离反射时,脉冲通过上接收通道,而当从短范围接收时,该脉冲通过下接收通道。 上通道包括仅通过长脉冲(频率扫描)的滤波器(19)。 这些脉冲在压缩机网络(20)中被压缩。 下通道包括仅通过短脉冲的滤波器(15),在该特定实施例中,该脉冲不是频扫。 发射机(2)反转相邻组中脉冲的顺序。 或者,长脉冲和短脉冲都可以被频率扫描。 在任一情况下,存在相邻的扫描脉冲对,与已知的系统相反,其中每个扫描脉冲已经在之前或之后是未被扫描的脉冲。
    • 14. 发明公开
    • PULSED RADAR SYSTEM AND METHOD OF OPERATING A PULSED RADAR SYSTEM
    • 脉冲雷达系统和操作脉冲雷达系统的方法
    • EP3311188A1
    • 2018-04-25
    • EP15895762.1
    • 2015-06-18
    • Saab AB
    • SILANDER, Anders
    • G01S7/28G01S13/02G01S13/06
    • G01S13/30G01S7/034G01S7/282G01S13/106G01S13/286
    • The invention relates to a method for operating a pulsed radar system, wherein the pulsed radar system comprises a transmitting antenna, configured to transmit transmission signals, a receiving antenna, configured to receive reflected signals and a signal generating means, configured to generate transmission signals. The method comprises the steps of generating a first transmission signal at a first centre frequency, generating a second transmission signal at a second centre frequency and transmitting the first and the second transmission signals during a predefined transmission time window. The first transmission signal is significantly longer than the second transmission signal. The transmission of the second transmission signal starts during or at the end of the transmission of the first transmission signal and ends essentially at the end of the transmission time window. When the first and/or second transmission signal hits a target a first reflected signal and/or a second reflected signal is generated, wherein the centre frequency of the first reflected signal correlate to the centre frequency of the first transmission signal and the centre frequency of the second reflected signal correlate to the centre frequency of the second transmission signal, and wherein the method further comprises the method step of receiving the first and/or second reflected signal.
    • 15. 发明公开
    • SIGNAL-PROCESSING DEVICE, RADAR DEVICE, AND SIGNAL-PROCESSING METHOD
    • 信号处理装置,雷达装置和信号处理方法
    • EP3255454A1
    • 2017-12-13
    • EP15881217.2
    • 2015-12-15
    • Furuno Electric Co., Ltd.
    • NAKATANI, Fumiya
    • G01S13/76G01S7/12G01S13/28
    • G01S13/767G01S7/12G01S7/292G01S13/28G01S13/30G01S13/76G08G3/00
    • The purpose may be to accurately detect a distress signal from a search and rescue transponder and reduce a calculation load for the detection. A signal processing device for detecting a distress signal from a search and rescue transponder may be provided. The device may include an instantaneous frequency change rate calculating module 21 configured to calculate a change rate of an instantaneous frequency of a complex reception signal generated from a reception wave received by a wave receiver, a memory 22 configured to store a value obtained based on a reference frequency sweeping speed that is a frequency sweeping speed of the distress signal, and a distress signal determining module 28 configured to determine whether the distress signal is issued from the search and rescue transponder, based on a comparison result between the instantaneous frequency change rate calculated by the instantaneous frequency change rate calculating module 21 and the value obtained based on the reference frequency sweeping speed stored in the memory 22.
    • 其目的可能是准确检测来自搜索和救援转发器的遇险信号,并减少检测的计算负担。 可以提供用于检测来自搜索和救援转发器的遇险信号的信号处理设备。 该装置可以包括:瞬时频率变化率计算模块21,被配置为计算由波接收器接收的接收波产生的复合接收信号的瞬时频率的变化率;存储器22,被配置为存储基于 作为遇险信号的扫频速度的参考频率扫描速度;以及遇险信号确定模块28,其被配置为基于计算出的瞬时频率变化率与来自搜索与救援应答器的遇险信号之间的比较结果, 通过瞬时频率变化率计算模块21和基于存储在存储器22中的参考频率扫描速度获得的值。
    • 16. 发明公开
    • DETECTION APPARATUS, FISH FINDER, AND RADAR
    • 检测装置,鱼探仪和雷达
    • EP3153881A1
    • 2017-04-12
    • EP15188489.7
    • 2015-10-06
    • Furuno Electric Company Limited
    • Shiraki, Rika
    • G01S15/96G01S7/539G01S15/10
    • G01S15/96G01S7/412G01S7/539G01S7/6209G01S13/28G01S13/30G01S15/104G01S15/108G01S15/89
    • This disclosure provides a detection apparatus (1, 1a, 1b, 1c) that includes a first echo intensity calculator (12, 12c) configured to calculate a first echo intensity of a first reception signal generated from a reception wave reflected on reflection objects, a second echo intensity calculator (13, 13c) configured to calculate a second echo intensity of a second reception signal generated from a reception wave reflected on said reflection objects, a signal duration of said second reception signal being shorter than that of said first reception signal, a frequency distribution generator (14,15) configured to generate a first frequency distribution of said first echo intensity and to generate a second frequency distribution of said second echo intensity, and a density extractor (18) configured to extract a density of said reflection objects based on a comparison of said first frequency distribution and said second frequency distribution.
    • 本公开提供了一种检测装置(1,1a,1b,1c),其包括:第一回波强度计算器(12,12c),其被配置为计算从反射物体上反射的接收波产生的第一接收信号的第一回波强度; 第二回波强度计算部(13,13c),其根据在所述反射物体上反射的接收波而生成的第二接收信号的第二回波强度,所述第二接收信号的信号时间比所述第一接收信号的信号时间短; 频率分布生成器(14,15),其被配置为生成所述第一回波强度的第一频率分布并且生成所述第二回波强度的第二频率分布;以及密度提取器(18),其被配置为提取所述反射物体的密度 基于所述第一频率分布和所述第二频率分布的比较。
    • 18. 发明公开
    • PRF-FREQUENZGENERATOR FÜR EIN FÜLLSTANDSMESSGERÄT
    • PRF频率发生器液位计
    • EP3084464A1
    • 2016-10-26
    • EP14799150.9
    • 2014-11-14
    • Endress + Hauser GmbH + Co. KG.
    • GLUTH, RolfMAYER, Winfried
    • G01S7/282G01S7/285G01F23/284G01S13/10G01S13/28G01S13/30G01S13/88G01S13/90G01S7/02
    • G01F23/284G01S7/024G01S7/282G01S7/285G01S13/103G01S13/22G01S13/282G01S13/30G01S13/88G01S13/90
    • The invention relates to a frequency generator for generating two pulse repetition frequency signals with slightly different frequencies for a radar measuring device. The frequency generator comprises an oscillator which generates an oscillator signal, a first signal path for generating a first pulse repetition frequency signal from the oscillator signal, and a second signal path for generating a second pulse repetition frequency signal from the oscillator signal. The first signal path comprises a frequency divider or a first DDS module which is designed to generate a first frequency signal on the basis of the oscillator signal, a first mixer which is designed to upmix the first frequency signal or a signal derived therefrom to an intermediate frequency band and to generate a first intermediate frequency signal, and a first ceramic bandpass filter which is designed to filter out a selected frequency component of the first intermediate frequency signal and to generate a bandpass-filtered first intermediate frequency signal. The second signal path comprises a second DDS component which is designed to generate a second frequency signal on the basis of the oscillator signal, said second frequency signal differring from the first frequency signal by a specified frequency offset, a second mixer which is designed to upmix the second frequency signal or a signal derived therefrom to an intermediate frequency band and to generate a second intermediate frequency signal, and a second ceramic bandpass filter which is designed to filter out a selected frequency component of the second intermediate frequency signal and to generate a bandpass-filtered second intermediate frequency signal.
    • 20. 发明公开
    • Generation of packets of waveforms
    • Erzeugung von Wellenformpaketen
    • EP1496371A1
    • 2005-01-12
    • EP03254298.7
    • 2003-07-07
    • Mitsubishi Electric Information Technology Centre Europe B.V.MITSUBISHI DENKI KABUSHIKI KAISHA
    • Szajnowski, Wieslaw Jerzy
    • G01S13/30H03K3/84G01S7/03
    • G01S7/282G01S13/106G01S13/30G01S13/931G01S2013/9332
    • The signals within a packet of transient signals are generated at timings corresponding to a binary pulse sequence having an autocorrelation function which, for all non-zero shifts, has a value which is substantially smaller than the maximum value at zero shift. The times of occurrence of the signals within a packet are such that the minimum gap between adjacent pulses in the corresponding binary pulse sequence exceeds a predetermined value, whereby the autocorrelation function of the binary pulse sequence exhibits a zero value for consecutive relative shifts which do not exceed a predetermined limit. Each transient signal may be a randomly-selected waveform with predetermined characteristics. At least one packet may be based on a composite sequence including a first binary pulse sequence interleaved with a second binary pulse sequence which is a time-reversed replica of the first binary pulse sequence, at least a substantial number of the transient signals corresponding to each binary pulse sequence being distinguishable from those corresponding to the other binary pulse sequence.
    • 瞬态信号分组内的信号在对应于具有自相关函数的二进制脉冲序列的定时产生,对于所有非零移位,其具有基本上小于零漂移时的最大值的值。 分组内的信号发生次数使得相应二进制脉冲序列中的相邻脉冲之间的最小间隙超过预定值,由此二进制脉冲序列的自相关函数对于不连续的相对移位呈现零值 超过预定限度。 每个瞬态信号可以是具有预定特性的随机选择的波形。 至少一个分组可以基于包括与第二二进制脉冲序列交错的第一二进制脉冲序列的复合序列,第二二进制脉冲序列是第一二进制脉冲序列的时间反转副本,至少相当数量的瞬态信号对应于每个 二进制脉冲序列与对应于其他二进制脉冲序列的二进制脉冲序列区分开。