WO2020133773A1 - 一种强回波对消接收装置 - Google Patents

一种强回波对消接收装置 Download PDF

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Publication number
WO2020133773A1
WO2020133773A1 PCT/CN2019/080714 CN2019080714W WO2020133773A1 WO 2020133773 A1 WO2020133773 A1 WO 2020133773A1 CN 2019080714 W CN2019080714 W CN 2019080714W WO 2020133773 A1 WO2020133773 A1 WO 2020133773A1
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signal
module
cancellation
echo
correlator
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French (fr)
Inventor
郭银景
牛晨曦
吕文红
丁庆安
高洁
孙红雨
陈赓
王正杰
陆翔
孔芳
刘珍
周玉洁
杨文健
刘辉
孟庆良
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Shandong University of Science and Technology
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Shandong University of Science and Technology
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
    • G01V1/18—Receiving elements, e.g. seismometer, geophone or torque detectors, for localised single point measurements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
    • G01V1/30—Analysis
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
    • G01V1/36—Effecting static or dynamic corrections on records, e.g. correcting spread; Correlating seismic signals; Eliminating effects of unwanted energy

Definitions

  • the present invention relates to the field of signal processing, and in particular to a strong echo cancellation receiving device.
  • Cancellation technology has been widely used in the development of radar receivers and other equipment, and has proven to be a practical technique for improving receiver sensitivity and eliminating direct wave or sidelobe interference.
  • the slot wave echo signal analyzed by the slot wave analyzer is very different from the common radar signal.
  • the external interference and side lobe interference are very small, and the echo generated by the near-end geological structure expands greatly in the time domain.
  • the echo reception generated by the geological structure at the end has a great influence, and the classic cancellation technology is difficult to adapt to the reception of weak signals by the slot wave analyzer.
  • This kind of canceller shows a small convergence time and a good cancellation effect when processing echo signals with small dispersion and only the conventional reflection interface. Due to the large dispersion of the slot wave signal, the echoes generated by the geological structure before and after each other are superimposed and overlapped together. The above canceller will be difficult to converge and the cancellation effect will be relatively poor.
  • the present invention provides a unique strong echo cancellation receiver device for receiving weak signals by the slot wave analyzer.
  • a strong echo cancellation receiving device includes a transmitter, a correlator, a detector, a cancellation signal synthesizer, a delay matching module, a vector module, a previous frame receiving signal module, and a non-orthogonal decomposition module;
  • the detector is connected to the correlator and the cancellation signal synthesizer respectively;
  • the transmitter is connected to the delay matching module, the delay matching module is connected to the correlator and the vector module, the correlator is connected to the vector module, and the vector module is connected to the cancellation signal synthesizer;
  • the previous frame received signal module is connected to a non-orthogonal decomposition module, and the non-orthogonal decomposition module is connected to a cancellation signal synthesizer.
  • the detector can convert the external elastic wave into a first echo signal and a second echo signal, the first echo signal is sent to the correlator, and the second echo signal is sent To the cancellation signal synthesizer;
  • the first echo signal, the transmission signal transmitted by the transmitter, and the reception signal transmitted by the reception signal module of the previous frame are all reference signals.
  • a delay signal is obtained, and the delay signal is sent to a correlator and a vector module respectively, and in the correlator, the first echo signal is sent Compare with the delayed signal to obtain the interference signal, and the interference signal is sent to the vector module;
  • the vector module adjusts the amplitude and phase of the interference signal to generate a cancellation signal having the same amplitude and opposite phase as the interference signal, and the cancellation signal is sent to the cancellation signal synthesizer.
  • the received signal transmitted by the received signal module of the previous frame is sent to the non-orthogonal decomposition module, and the non-orthogonal decomposition module performs non-orthogonal decomposition processing on the received signal to obtain a pre-cancellation signal, and the pre-cancellation signal
  • the signal is sent to the cancellation signal synthesizer.
  • the cancellation signal synthesizer synthesizes the pre-cancellation signal, the cancellation signal and the second echo signal to obtain a slot wave signal.
  • the first echo signal, the transmit signal emitted by the transmitter and the receive signal emitted by the previous frame receive signal module are used as reference signals to adaptively generate a cancellation signal to suppress the slot wave analyzer from
  • the echo signal concerned has inherited the processing result of the original received signal, and the synthesized cancellation signal is more targeted, which can not only interfere with the direct wave and side lobe interference, but also reduce the The signal is suppressed, thereby greatly improving the signal-to-noise ratio of the echo signal generated by the far-end geological structure concerned, laying the foundation for a more accurate analysis of the slot signal.
  • FIG. 1 is a schematic block diagram of a strong echo cancellation receiving device.
  • FIG. 2 is a block diagram of the elastic wave conversion of the present invention.
  • FIG. 3 is a block diagram of the first part of the cancellation process of the present invention.
  • FIG. 4 is a reflection diagram of the transmission signal of the present invention in each medium.
  • FIG. 5 is a diagram of the first part of the present invention to generate a cancellation signal.
  • FIG. 6 is a block diagram of a second part of the cancellation process of the present invention.
  • a strong echo cancellation receiving device includes a transmitter, a correlator, a detector, a cancellation signal synthesizer, a delay matching module, a vector module, a previous frame receiving signal module, and a non-orthogonal decomposition module.
  • the detector is respectively connected to the correlator and the cancellation signal synthesizer, the detector can convert the external elastic wave into the first echo signal and the second echo signal, the first echo signal is sent to the correlation The second echo signal is sent to the cancellation signal synthesizer.
  • the first echo signal, the transmitted signal transmitted by the transmitter and the received signal transmitted by the previous frame receiving signal module are all reference signals, inheriting the processing result of the original signal, the synthesized cancellation signal is more targeted, not only capable of It can also suppress the signal "not concerned by the signal of the current frame" to cancel the direct wave and side lobe interference, thereby greatly improving the signal-to-noise ratio of the echo signal generated by the far-end geological structure concerned, which is more Accurate analysis lays the foundation.
  • the transmitter is connected to the delay matching module, the delay matching module is connected to the correlator and the vector module, the correlator is connected to the vector module, and the vector module is connected to the cancellation signal synthesizer, this is the first part of the cancellation process, As shown in Figure 3
  • the delay matching module After the transmission signal transmitted by the transmitter passes through the delay matching module, a delay signal is obtained, and the delay signal is sent to the correlator and the vector module respectively. In the correlator, the delay signal is correlated with the first echo signal. Under the action of the device, find the interference signal, that is, the waves ai , oc 2 and the direct wave and side lobe wave of other interfaces shown in Figure 4. After the interference signal is obtained, the interference signal is sent to the vector module. The vector module adjusts the amplitude and phase of the interference signal to produce a cancellation signal with the same amplitude and opposite phase as the interference signal. As shown in Figure 5, the cancellation signal is sent to the cancellation signal synthesizer to cancel the reflection of other interfaces Signal, direct wave and side lobe Disturb.
  • the previous frame received signal module is connected to a non-orthogonal decomposition module, and the non-orthogonal decomposition module is connected to a cancellation signal synthesizer. This is the second part of the cancellation process, as shown in FIG. 6.
  • the received signal transmitted by the received signal module in the previous frame is sent to the non-orthogonal decomposition module, and the non-orthogonal decomposition module performs non-orthogonal decomposition processing on the received signal to obtain a pre-cancellation technical signal, and the pre-cancellation technical signal Send to the cancellation signal synthesizer.
  • the cancellation signal synthesizer synthesizes the pre-cancellation technology signal, the cancellation signal and the second echo signal to obtain a slot wave signal.
  • the non-orthogonal decomposition module processes all kinds of signals in the received signal by a non-orthogonal decomposition method, and separates the signal of “signal attention of this frame”, and the remaining “signal of attention of this frame”
  • the signal is sent to the cancellation signal synthesizer as a pre-cancellation signal, as shown in Figure 7. This process greatly improves the signal-to-noise ratio of the echo signal generated by the remote geological structure, which is conducive to a more accurate analysis of the slot wave signal.

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  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Acoustics & Sound (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Noise Elimination (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

一种强回波对消接收装置，包括发射机、相关器、检波器、对消信号合成器、延时匹配模块、矢量模块、前帧接收信号模块、非正交分解模块；其中，检波器分别与相关器和对消信号合成器相连，发射机与延时匹配模块相连，延时匹配模块分别与相关器和矢量模块相连，相关器与矢量模块相连，矢量模块与对消信号合成器相连，前帧接收信号模块与非正交分解模块相连，非正交分解模块与对消信号合成器相连。该强回波对消接收装置合成的对消信号针对性更强，从而提高远端地质构造回波信号的信噪比。

Description

说明书 发明名称：一种强回波对消接收装置 技术领域
[0001] 本发明涉及信号处理领域， 具体涉及一种强回波对消接收装置。
背景技术
[0002] 对消技术已广泛应用于雷达接收机等设备的研制工作， 已经被证明是提高接收 机灵敏度及消除直达波或旁瓣干扰的实用技术。 槽波分析仪所分析的槽波回波 信号与常见的雷达信号有非常大的不同， 外部干扰与旁瓣干扰很小， 而近端地 质构造产生的回波在时域扩展很大， 对远端地质构造产生的回波接收影响很大 ， 经典的对消技术很难适应槽波分析仪对微弱信号的接收。 这种对消器对于处 理频散很小且只有常规反射界面的回波信号时表现出较小的收敛时间和较好的 对消效果。 因槽波信号的频散很大， 前后地质构造产生的回波相互叠加， 混叠 在一起， 上述对消器将很难收敛， 对消效果也会比较差。
发明概述
技术问题
问题的解决方案
技术解决方案
[0003] 针对现有的经典自适应对消器的缺陷和不足， 本发明提供了一种独特的强回波 对消接收装置， 用于槽波分析仪对微弱信号的接收。
[0004] 本发明采用以下的技术方案：
[0005] 一种强回波对消接收装置， 包括发射机、 相关器、 检波器、 对消信号合成器、 延时匹配模块、 矢量模块、 前帧接收信号模块、 非正交分解模块；
[0006] 所述检波器分别与相关器和对消信号合成器相连；
[0007] 发射机与延时匹配模块相连， 延时匹配模块分别与相关器和矢量模块相连， 相 关器与矢量模块相连， 矢量模块与对消信号合成器相连；
[0008] 所述前帧接收信号模块与非正交分解模块相连， 非正交分解模块与对消信号合 成器相连。 [0009] 优选地， 所述检波器能将外界的弹性波转变为第一路回波信号和第二路回波信 号， 第一路回波信号送至相关器， 第二路回波信号送至对消信号合成器；
[0010] 第一回波信号、 发射机发射的发射信号和前帧接收信号模块发射的接收信号均 为参考信号。
[0011] 优选地， 所述发射机发射的发射信号经过延时匹配模块后， 得到延时信号， 延 时信号分别送入相关器和矢量模块， 在相关器内， 将第一路回波信号和延时信 号进行对比， 得到干扰信号， 干扰信号送入矢量模块；
[0012] 矢量模块对干扰信号进行幅度和相位调整， 产生与干扰信号幅度相等、 相位相 反的对消信号， 对消信号被送至对消信号合成器。
[0013] 优选地， 前帧接收信号模块发射的接收信号， 接收信号送至非正交分解模块， 非正交分解模块对接收信号进行非正交分解处理， 得到预对消信号， 预对消信 号送至对消信号合成器。
[0014] 优选地， 对消信号合成器将预对消信号、 对消信号和第二路回波信号进行合成 ， 得到槽波信号。
发明的有益效果
有益效果
[0015] 本发明具有的有益效果是：
[0016] 基于槽波的特性， 以第一回波信号、 发射机发射的发射信号和前帧接收信号模 块发射的接收信号为参考信号， 自适应地产生对消信号， 抑制槽波分析仪不关 注的回波信号， 并继承了对原始接收信号的处理结果， 合成的对消信号针对性 更强， 不仅能够对消直达波和旁瓣干扰， 还能够将“本帧信号所不关注”的信号抑 制掉， 从而大大提高所关注的远端地质构造产生回波信号的信噪比， 为更精准 地分析槽波信号打下基础。
对附图的简要说明
附图说明
[0017] 图 1为强回波对消接收装置的原理框图。
[0018] 图 2为本发明的弹性波转换框图。
[0019] 图 3为本发明的第一部分对消过程框图。 [0020] 图 4为本发明发射信号在各个介质中的反射图。
[0021] 图 5本发明的第一部分对消信号生成图。
[0022] 图 6本发明的第二部分对消过程框图。
[0023] 图 7本发明的非正交分解方法框图。 发明实施例
本发明的实施方式
[0024] 下面结合附图和具体实施例对本发明的具体实施方式做进一步说明：
[0025] 结合图 1至图 7 , 为了使槽波分析仪可以更好的接收微弱信号， 设计了一种强回 波对消接收装置。
[0026] 一种强回波对消接收装置， 包括发射机、 相关器、 检波器、 对消信号合成器、 延时匹配模块、 矢量模块、 前帧接收信号模块、 非正交分解模块。
[0027] 检波器分别与相关器和对消信号合成器相连， 检波器能将外界的弹性波转变为 第一路回波信号和第二路回波信号， 第一路回波信号送至相关器， 第二路回波 信号送至对消信号合成器。
[0028] 第一回波信号、 发射机发射的发射信号和前帧接收信号模块发射的接收信号均 为参考信号， 继承对原始信号的处理结果， 合成的对消信号针对性更强， 不仅 能够对消直达波和旁瓣干扰， 还能够将“本帧信号所不关注”的信号抑制掉， 从而 大大提高所关注的远端地质构造产生回波信号的信噪比， 为槽波信号的更精准 分析打下基础。
[0029] 发射机与延时匹配模块相连， 延时匹配模块分别与相关器和矢量模块相连， 相 关器与矢量模块相连， 矢量模块与对消信号合成器相连， 此为第一部分对消过 程， 如图 3
[0030] 发射机发射的发射信号经过延时匹配模块后， 得到延时信号， 延时信号分别送 入相关器和矢量模块， 在相关器内， 延时信号与第一路回波信号在相关器的作 用下找到干扰的信号， 即图 4所示的其他界面的波 a i、 oc 2及直达波与旁瓣波。 之 后得到干扰信号， 干扰信号送入矢量模块。 矢量模块对干扰信号进行幅度和相 位调整， 产生与干扰信号幅度相等、 相位相反的对消信号， 如图 5所示， 对消信 号被送至对消信号合成器， 从而对消其他界面的反射信号、 直达波和旁瓣的干 扰。
[0031] 前帧接收信号模块与非正交分解模块相连， 非正交分解模块与对消信号合成器 相连， 此为第二部分对消过程， 如图 6。
[0032] 前帧接收信号模块发射的接收信号， 接收信号送至非正交分解模块， 非正交分 解模块对接收信号进行非正交分解处理， 得到预对消技术信号， 预对消技术信 号送至对消信号合成器。 对消信号合成器将预对消技术信号、 对消信号和第二 路回波信号进行合成， 得到槽波信号。
[0033] 非正交分解模块通过一种非正交分解方法对接收信号中的各类信号进行处理， 将“本帧信号关注”的信号分离出来， 剩下的“本帧信号不关注”的信号作为预对消 信号发送到对消信号合成器， 如图 7。 此过程大大提高远端地质构造产生回波信 号的信噪比， 有利于槽波信号的更精准分析。
[0034] 当然， 上述说明并非是对本发明的限制， 本发明也并不仅限于上述举例， 本技 术领域的技术人员在本发明的实质范围内所做出的变化、 改型、 添加或替换， 也应属于本发明的保护范围。

Claims

权利要求书
[权利要求 1] 一种强回波对消接收装置， 其特征在于， 包括发射机、 相关器、 检波 器、 对消信号合成器、 延时匹配模块、 矢量模块、 前帧接收信号模块 、 非正交分解模块；
所述检波器分别与相关器和对消信号合成器相连； 发射机与延时匹配模块相连， 延时匹配模块分别与相关器和矢量模块 相连， 相关器与矢量模块相连， 矢量模块与对消信号合成器相连； 所述前帧接收信号模块与非正交分解模块相连， 非正交分解模块与对 消信号合成器相连。
[权利要求 2] 根据权利要求 1所述的一种强回波对消接收装置， 其特征在于， 所述 检波器能将外界的弹性波转变为第一路回波信号和第二路回波信号， 第一路回波信号送至相关器， 第二路回波信号送至对消信号合成器； 第一回波信号、 发射机发射的发射信号和前帧接收信号模块发射的接 收信号均为参考信号。
[权利要求 3] 根据权利要求 2所述的一种强回波对消接收装置， 其特征在于， 所述 发射机发射的发射信号经过延时匹配模块后， 得到延时信号， 延时信 号分别送入相关器和矢量模块， 在相关器内， 将第一路回波信号和延 时信号进行对比， 得到干扰信号， 干扰信号送入矢量模块； 矢量模块对干扰信号进行幅度和相位调整， 产生与干扰信号幅度相等 、 相位相反的对消信号， 对消信号被送至对消信号合成器。
[权利要求 4] 根据权利要求 3所述的一种强回波对消接收装置， 其特征在于， 前帧 接收信号模块发射的接收信号， 接收信号送至非正交分解模块， 非正 交分解模块对接收信号进行非正交分解处理， 得到预对消信号， 预对 消信号送至对消信号合成器。
[权利要求 5] 根据权利要求 4所述的一种强回波对消接收装置， 其特征在于， 对消 信号合成器将预对消信号、 对消信号和第二路回波信号进行合成， 得 到槽波信号。
PCT/CN2019/080714 2018-12-24 2019-04-01 一种强回波对消接收装置 Ceased WO2020133773A1 (zh)

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