WO2023115970A1 - 伪随机噪声雷达集成芯片 - Google Patents

伪随机噪声雷达集成芯片 Download PDF

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WO2023115970A1
WO2023115970A1 PCT/CN2022/110890 CN2022110890W WO2023115970A1 WO 2023115970 A1 WO2023115970 A1 WO 2023115970A1 CN 2022110890 W CN2022110890 W CN 2022110890W WO 2023115970 A1 WO2023115970 A1 WO 2023115970A1
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signal
pseudo
phase
receiving
transmitting
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PCT/CN2022/110890
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French (fr)
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马殊
王勇
马鸿军
邢洋洋
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河南森源鸿马电动汽车有限公司
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Publication of WO2023115970A1 publication Critical patent/WO2023115970A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications

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  • the utility model relates to the field of radar system chips, in particular to a pseudo-random noise radar integrated chip, which can be applied to a radar system for target detection on the scene of emergency rescue.
  • Radar systems are widely used in the fields of security and anti-terrorism. Compared with traditional optical monitoring equipment, they can image in real time at night, in foggy, rainy and other bad weather, and have higher detection accuracy. In short-range automotive or industrial radar applications, high target resolution radar is critical, and resolution is directly related to the modulation bandwidth of the radar system.
  • the frequency-modulated continuous wave radar technology widely used in current radar sensors relies on a large voltage-controlled oscillator tuning range, and the voltage-controlled oscillator will be affected by process, temperature and voltage changes. increase and degrade continuously. Therefore, this technique is not suitable for security applications that require high resolution and high resilience. .
  • the utility model provides a pseudo-random noise radar integrated chip, which has a high degree of integration.
  • the pseudo-random sequence generated by a pseudo-random binary sequence generator is used as the excitation of the transmitting antenna, which effectively avoids the interference of signals in the detection process due to parts technology, voltage and temperature. It is suitable for the application of on-site target detection radar system for emergency rescue such as security and anti-terrorism.
  • a kind of pseudo-random noise radar integrated chip is used for the radar system of emergency rescue site target detection, including the sending and receiving signal circuit module arranged on the radar system chip, and the described sending and receiving signal circuit module includes :
  • the transmitting link for signal output and the receiving link for processing the echo signal and transmitting it to the baseband are integrated and set on a single chip, wherein the transmitting link includes: a lock for generating the clock signal of the transmitting link Phase loop one, connected with phase-locked loop one, is used to generate a pseudo-random binary sequence generator as a broadband excitation pseudo-random binary sequence, and connected with the pseudo-random binary sequence generator, is used to modulate the pseudo-random binary sequence with a binary phase shift key A control modulator, a power amplifier connected with the binary phase shift keying modulator for amplifying the modulated sequence signal and a transmitting antenna connected with the power amplifier for transmitting the amplified signal;
  • the receiving chain The circuit includes: the receiving antenna for receiving the target signal, the low
  • the receiving chain includes: two mixing branches connected with the low noise amplifier and two carrier driving branches connected with the phase-locked loop two, wherein the lock
  • the carrier signal output by the second phase loop is divided into two local oscillator signals by two carrier drive branches, one of which drives the I channel of the I/Q mixer, and the other local oscillator signal drives the I channel after transposition processing.
  • the output of the low-noise amplifier is converted and processed by the I/Q mixer as the input signal of the baseband processing module of the radar system.
  • the receiving link also includes a duplexer connected to the second output of the phase-locked loop for isolating the transmitting link and the receiving link, and the duplexer receives the second output of the phase-locked loop
  • the carrier signal is fed to the binary phase shift keying modulator in the transmit chain and the I/Q mixer in the receive chain respectively.
  • the utility model has the advantages of simple structure, scientific and reasonable design, the transmitting link and the receiving link are integrated on a single chip, thereby reducing the cost, volume, power consumption, etc. There is no influence caused by voltage-controlled oscillator process, temperature and voltage changes, and it can be used in different sensing applications that require high reliability and high resolution.
  • the receiving link uses I/Q two-way mixers to improve the intermediate frequency
  • the signal image suppression performance can solve the problem that the FM continuous wave radar widely used in the current radar sensor is overly dependent on the voltage-controlled oscillator, and can meet the dispatch and command of the emergency rescue field work, and has a good application prospect.
  • Fig. 1 is a schematic diagram of the structure of the pseudo-random noise radar integrated chip transceiver signal circuit module in the embodiment.
  • the number 1 represents the transmitting antenna
  • the number 2 represents the receiving antenna
  • the number 3 represents the power amplifier
  • the number 4 represents the low noise amplifier
  • the number 5 represents the I/Q mixer
  • the number 6 represents the duplexer.
  • the frequency-modulated continuous wave radar technology widely used in radar sensors relies on the large tuning range of the voltage-controlled oscillator.
  • the voltage-controlled oscillator will be affected by process, temperature and voltage changes. This type of radar will also increase with the operating time. However, it is constantly degraded and is not suitable for radar systems for on-site target detection in emergency rescue.
  • the embodiment of the present utility model provides a pseudo-random noise radar integrated chip, which is used in a radar system for emergency rescue scene target detection, including a transceiver signal circuit module arranged on the radar system chip, and the transceiver signal circuit module includes :
  • the transmitting link for signal output and the receiving link for processing the echo signal and transmitting it to the baseband are integrated and set on a single chip, wherein the transmitting link includes: a lock for generating the clock signal of the transmitting link Phase loop one, connected with phase-locked loop one, is used to generate a pseudo-random binary sequence generator as a broadband excitation pseudo-random binary sequence, and connected with the pseudo-random binary sequence generator, is used to modulate the pseudo-random binary sequence with a binary phase shift key A control modulator, a power amplifier 3 connected to the binary phase shift keying modulator for amplifying the modulated sequence signal and a transmitting antenna 1 connected to the power amplifier for transmitting the amplified signal;
  • the receiving link includes: a receiving antenna 2 for
  • the transmitting link and receiving link are integrated on a single chip, thereby reducing the cost, volume, power consumption, etc. of the radar system, and the ultra-wideband pseudo-random binary sequence is used as the excitation, so that the radar chip does not have voltage-controlled oscillator technology, temperature and The impact of voltage changes can be used in different sensing applications that require high reliability and high resolution.
  • the receiving link uses I/Q two-way mixers, which can improve the image suppression performance of intermediate frequency signals and facilitate practical application scenarios.
  • the receiving chain includes: two mixing branches connected with the low noise amplifier 4 and two carrier driving branches connected with the phase-locked loop two , wherein, the carrier signal output by the second phase-locked loop is divided into two local oscillator signals by two carrier drive branches, wherein one local oscillator signal drives the I channel of the I/Q mixer 5, and the other local oscillator signal passes through
  • the Q channel of the I/Q mixer 5 is driven, and the output of the low noise amplifier 4 is converted and processed by the I/Q mixer 5 as the input signal of the baseband processing module of the radar system.
  • the receiving link also includes a duplexer 6 connected to the second output of the phase-locked loop for isolating the transmitting link and the receiving link, and the duplexer 6 receives the carrier signal output by the second phase-locked loop, and separates the carrier signals Feeds to the BPSK modulator in the transmit chain and the I/Q mixer in the receive chain.
  • a duplexer 6 connected to the second output of the phase-locked loop for isolating the transmitting link and the receiving link, and the duplexer 6 receives the carrier signal output by the second phase-locked loop, and separates the carrier signals Feeds to the BPSK modulator in the transmit chain and the I/Q mixer in the receive chain.
  • a pseudo-random binary sequence is generated by a pseudo-random binary sequence generator, which can be used as the aforementioned broadband excitation.
  • the pseudo-random binary sequence is modulated on the carrier signal with the center frequency fc .
  • the carrier signal whose center frequency is f c is generated by another phase-locked loop.
  • the pseudo-random binary sequence is fed into the power amplifier 3 after being modulated by the binary phase-shift keying modulator, and finally transmitted by the transmitting antenna.
  • Pseudorandom binary sequences have good autocorrelation properties and can be used as broadband excitations.
  • the receiving antenna 2 receives the signal reflected by the target, and after being amplified by the low noise amplifier 4, it enters the I/Q mixer 5 to convert the frequency to an intermediate frequency, and then passes it to the baseband for signal processing.
  • Phase-locked loop 2 generates a carrier signal and feeds it to the binary phase-shift keying modulator of the transmitting link and the I/Q mixer 5 of the receiving link through the duplexer 6 respectively.
  • the duplexer 6 can isolate the transmitting link from the receiving link, ensuring that the receiving and transmitting can work simultaneously, and avoiding mutual interference of the two signals.
  • the output signal of PLL 1 is f m ;
  • the input signal of the pseudo-random binary sequence generator is f m ;
  • the output binary sequence is m(t) ;
  • the input signal of the binary phase-shift keying modulator is m(t)
  • the center frequency of the phase-locked loop two output is the carrier signal of f c , and the output is fed into the power amplifier 3;
  • the input signal of the power amplifier 3 is s TX (t) , and finally transmits the signal to the target via the transmitting antenna 1, the signal After s TX (t) is transmitted through the transmitting antenna 1 and reaches the target object, a part of the transmitted signal is reflected back and received by the receiving antenna 2 .
  • the signal reflected by the target object received by the receiving antenna 2 is s RX (t) , and the signal is amplified by the low noise amplifier 4 and divided into two paths, which are respectively fed into the I/Q two-way mixer 5 .
  • the duplexer 6 is connected to the binary phase-shift keying modulator to modulate the pseudo-random binary sequence, and the other path is divided into two, and the other path is directly As a local oscillator signal to drive the I-channel mixer, one channel is shifted 90 degrees as a local oscillator signal to drive the Q-channel mixer.
  • the I/Q mixer 5 realizes the frequency conversion function, down-converts the signal transmitted by the low noise amplifier 4 into an intermediate frequency signal, and the intermediate frequency signal can be used for baseband signal processing in the subsequent radar system.
  • the I/Q two-way mixer is used in the receiving chain, which can improve the image suppression performance of the intermediate frequency signal and facilitate the processing of the baseband signal in the subsequent stage.
  • a pseudo-random binary sequence is used as the excitation, which is not affected by temperature, process and voltage changes, and can be widely used in radar sensing applications requiring high reliability and high resolution.

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

一种伪随机噪声雷达集成芯片，涉及雷达系统芯片领域，用于应急救援现场目标检测的雷达系统，包含设置在雷达系统芯片上的收发信号电路模块，收发信号电路模块包含：集成设置在单一芯片上用于信号输出的发射链路和用于对回波信号进行处理并传输至基带的接收链路，其中，发射链路包含：锁相环一，伪随机二进制序列生成器，二进制相移键控调制器，功率放大器（3）和发射天线（1）；接收链路包含：接收天线（2），低噪声放大器（4），锁相环二，及I/Q混频器（5）。这种伪随机噪声雷达集成芯片结构简单，设计科学、合理，能够避免因零部件工艺、电压、温度对检测过程中信号的影响，可适合安防与反恐等应急救援现场目标检测雷达系统的应用。

Description

伪随机噪声雷达集成芯片 技术领域
本实用新型涉及雷达系统芯片领域，特别涉及一种伪随机噪声雷达集成芯片，可应用于应急救援现场目标检测的雷达系统。
 背景技术
雷达系统，广泛应用于安防与反恐等领域，与传统光学监控设备相比，可在夜间，雾天，雨天等恶劣天气下实时成像，探测准确度更高。在短距离汽车或工业雷达应用中，高目标分辨率雷达至关重要，而分辨率又与雷达系统的调制带宽直接相关。
 技术问题
当前雷达传感器中广泛使用的调频连续波雷达技术依赖于较大的压控振荡器的调谐范围，且压控振荡器会受到工艺、温度和电压变化的影响，该类型雷达也会随着运行时间的增加而不断退化。因此该技术并不适合需要高分辨率和高弹性的安全应用。。
 技术解决方案
本实用新型提供一种伪随机噪声雷达集成芯片，集成度高，使用伪随机二进制序列生成器产生的伪随机序列作为发射天线激励，有效避免因零部件工艺、电压、温度对检测过程中信号的影响，可适合安防与反恐等应急救援现场目标检测雷达系统的应用。
按照本实用新型所提供的设计方案， 一种伪随机噪声雷达集成芯片，用于应急救援现场目标检测的雷达系统，包含设置在雷达系统芯片上的收发信号电路模块，所述收发信号电路模块包含：集成设置在单一芯片上用于信号输出的发射链路和用于对回波信号进行处理并传输至基带的接收链路，其中，发射链路包含：用于产生发射链路时钟信号的锁相环一，与锁相环一连接用于产生作为宽带激励伪随机二进制序列的伪随机二进制序列生成器，与伪随机二进制序列产生器连接用于对伪随机二进制序列进行调制的二进制相移键控调制器，与二进制相移键控调制器连接用于对调制后的序列信号进行放大处理的功率放大器和与功率放大器连接用于将放大处理后的信号进行发射的发射天线；所述接收链路包含：用于接收目标信号的接收天线，与接收天线连接用于对接收的目标信号进行放大处理的低噪声放大器，用于产生接收链路载波信号的锁相环二，及与锁相环二和低噪声放大器连接用于结合载波信号对低噪声放大器输出信号进行变频处理的I/Q混频器。
作为本实用新型伪随机噪声雷达集成芯片，进一步地，接收链路中包含：与低噪声放大器连接的两个混频支路及与锁相环二连接的两个载波驱动支路，其中，锁相环二输出的载波信号被两个载波驱动支路划分为两路本振信号，其中一路本振信号驱动I/Q混频器的I路，另一路本振信号通过移项处理后驱动I/Q混频器的Q路，低噪声放大器输出通过I/Q混频器进行变频处理后作为雷达系统基带处理模块的输入信号。
作为本实用新型伪随机噪声雷达集成芯片，进一步地，接收链路还包含与锁相环二输出连接用于隔离发射链路与接收链路的双工器，双工器接收锁相环二输出的载波信号，并将载波信号分别馈入发射链路的二进制相移键控调制器和接收链路中的I/Q混频器。
 有益效果
本实用新型结构简单，设计科学、合理，发射链路和接收链路集成于单一芯片上，从而实现降低雷达系统成本、体积、功耗等，采用超宽带伪随机二进制序列作为激励，使得雷达芯片不存在压控振荡器工艺、温度和电压变化而带来的影响，可用于需要高可靠性和高分辨率的不同传感应用，接收链路采用I/Q两路混频器，可提升中频信号镜像抑制性能，解决当前雷达传感器中广泛使用的调频连续波雷达过度依赖压控振荡器等问题，满足应急救援现场工作的调度和指挥，具有较好的应用前景。
 附图说明
图1为实施例中伪随机噪声雷达集成芯片收发信号电路模块结构示意。
图中标号，标号1代表发射天线，标号2代表接收天线，标号3代表功率放大器，标号4代表低噪声放大器，标号5代表I/Q混频器，标号6代表双工器。
 本发明的最佳实施方式
下面结合附图和技术方案对本实用新型作进一步详细的说明，并通过优选的实施例详细说明本实用新型的实施方式，但本实用新型的实施方式并不限于此。
雷达传感器中广泛使用的调频连续波雷达技术依赖于较大的压控振荡器的调谐范围，压控振荡器会受到工艺、温度和电压变化的影响，该类型雷达也会随着运行时间的增加而不断退化，不适用于应急救援现场目标检测的雷达系统。为此，本实用新型实施例，提供一种伪随机噪声雷达集成芯片，用于应急救援现场目标检测的雷达系统，包含设置在雷达系统芯片上的收发信号电路模块，所述收发信号电路模块包含：集成设置在单一芯片上用于信号输出的发射链路和用于对回波信号进行处理并传输至基带的接收链路，其中，发射链路包含：用于产生发射链路时钟信号的锁相环一，与锁相环一连接用于产生作为宽带激励伪随机二进制序列的伪随机二进制序列生成器，与伪随机二进制序列产生器连接用于对伪随机二进制序列进行调制的二进制相移键控调制器，与二进制相移键控调制器连接用于对调制后的序列信号进行放大处理的功率放大器3和与功率放大器连接用于将放大处理后的信号进行发射的发射天线1；所述接收链路包含：用于接收目标信号的接收天线2，与接收天线连接用于对接收的目标信号进行放大处理的低噪声放大器4，用于产生接收链路载波信号的锁相环二，及与锁相环二和低噪声放大器连接用于结合载波信号对低噪声放大器输出信号进行变频处理的I/Q混频器5。将发射链路和接收链路集成于单一芯片上，从而实现降低雷达系统成本、体积、功耗等，采用超宽带伪随机二进制序列作为激励，使得雷达芯片不存在压控振荡器工艺、温度和电压变化而带来的影响，可用于需要高可靠性和高分辨率的不同传感应用，接收链路采用I/Q两路混频器，可提升中频信号镜像抑制性能，便于实际场景应用。
作为本实用新型实施例中伪随机噪声雷达集成芯片，进一步地，接收链路中包含：与低噪声放大器4连接的两个混频支路及与锁相环二连接的两个载波驱动支路，其中，锁相环二输出的载波信号被两个载波驱动支路划分为两路本振信号，其中一路本振信号驱动I/Q混频器5的I路，另一路本振信号通过移项处理后驱动I/Q混频器5的Q路，低噪声放大器4输出通过I/Q混频器5进行变频处理后作为雷达系统基带处理模块的输入信号。进一步地，接收链路还包含与锁相环二输出连接用于隔离发射链路与接收链路的双工器6，双工器6接收锁相环二输出的载波信号，并将载波信号分别馈入发射链路的二进制相移键控调制器和接收链路中的I/Q混频器。
参见图1所示，在发射链路中，锁相环一产生时钟信号后，经由伪随机二进制序列生成器产生伪随机二进制序列，伪随机二进制序列可作为前述宽带激励。伪随机二进制序列调制在中心频率为 f c 的载波信号上。其中，中心频率为 f c 的载波信号由另一锁相环产生。伪随机二进制序列经由二进制相移键控调制器调制后馈入功率放大器3，并最有由发射天线发射1。伪随机二进制序列具有良好的自相关性能，可作为宽带激励。
在接收链路中，接收天线2接收目标反射回来的信号，并由低噪声放大器4进行放大后进入I/Q混频器5变频到中频，后交由基带进行信号处理。锁相环二产生载波信号后经由双工器6分别馈入发射链路的二进制相移键控调制器和接受链路的I/Q混频器5。双工器6可将发射链路与接收链路隔离，保证接收和发射能同时工作，并避免两路信号相互干扰。
发射链路中，锁相环一输出信号为 f m ；伪随机二进制序列生成器输入信号为 f m ；输出二进制序列为 m(t) ；二进制相移键控调制器输入信号为 m(t)和锁相环二输出的中心频率为 f c 的载波信号，输出馈入功率放大器3；所述功率放大器3输入信号为 s TX(t) ，并最终经由发射天线1发射该信号到目标，信号 s TX(t) 经由发射天线1发射后，到达目标物体后，一部分发射信号被反射回来，并由接收天线2接收。
接收链路中，接收天线2接收到目标物体反射回来的的信号为 s RX(t) ，该信号经低噪声放大器4放大后分为两路，分别馈入I/Q两路混频器5。锁相环二输出中心频率为 f c 的载波信号进入接收链路后，由双工器6连接二进制相移键控调制器对伪随机二进制序列进行调制，另一路被一分为二，一路直接作为本振信号激励驱动I路混频器，一路移相90度后作为本振信号激励驱动Q路混频器。I/Q混频器5实现变频功能，将低噪声放大器4传递过来的信号进行下变频为中频信号，中频信号可用于后续雷达系统中的基带信号处理。接收链路中采用I/Q两路混频器，可提升中频信号的镜像抑制性能，便于后级基带信号处理。
本案实施例中，采用伪随机二进制序列作为激励，不受温度、工艺和电压变化的影响，可广泛适用于需要高可靠性和高分辨率的雷达传感应用。
本文中术语“和/或”表示可以存在三种关系。例如，A和/或B可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”一般表示前后关联对象是一种“或”的关系。
除非另作定义，此处使用的技术术语或者科学术语应当为本发明所属领域内具有一般技能的人士所理解的通常意义。本申请说明书以及权利要求书中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。同样，“一个”或者“一”等类似词语也不必然表示数量限制。“包括”或者“包含”等类似的词语意指出现该词前面的元件或物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他元件或者物件。“连接”或者“相连”等类似词语并非现定于物理的或者机械的连接，而是可以包括电性的连接，不管是直接的还是间接的。“上”、“下”、“左”、“右”等仅用于表示相对位置关系，当被描述对象的绝对位置改变后，则该相对位置关系也可能相应地改变。
上文中参照优选的实施例详细描述了本发明的示范性实施方式，然而本领域技术人员可理解的是，在不背离本发明理念的前提下，可以对上述具体实施例做出多种变型和改型，且可以对本发明提出的各技术特征、结构进行多种组合，而不超出本发明的保护范围，本发明的保护范围由所附的权利要求确定。前述对本实用新型的具体示例性实施方案的描述并非想将本实用新型限定为所公开的精确形式，并且很显然，根据上述教导，可以进行很多改变和变化。对示例性实施例进行选择和描述的目的在于解释本实用新型的特定原理及其实际应用，从而使得本领域的技术人员能够实现并利用本实用新型的各种不同的示例性实施方案以及各种不同的选择和改变。本实用新型的范围意在由权利要求书及其等同形式所限定。

Claims (3)

  1. 一种伪随机噪声雷达集成芯片，用于应急救援现场目标检测的雷达系统，包含设置在雷达系统芯片上的收发信号电路模块，其特征在于，所述收发信号电路模块包含：集成设置在单一芯片上用于信号输出的发射链路和用于对回波信号进行处理并传输至基带的接收链路，其中，发射链路包含：用于产生发射链路时钟信号的锁相环一，与锁相环一连接用于产生作为宽带激励伪随机二进制序列的伪随机二进制序列生成器，与伪随机二进制序列产生器连接用于对伪随机二进制序列进行调制的二进制相移键控调制器，与二进制相移键控调制器连接用于对调制后的序列信号进行放大处理的功率放大器和与功率放大器连接用于将放大处理后的信号进行发射的发射天线；所述接收链路包含：用于接收目标信号的接收天线，与接收天线连接用于对接收的目标信号进行放大处理的低噪声放大器，用于产生接收链路载波信号的锁相环二，及与锁相环二和低噪声放大器连接用于结合载波信号对低噪声放大器输出信号进行变频处理的I/Q混频器。
  2. 根据权利要求1所述的伪随机噪声雷达集成芯片，其特征在于，接收链路中包含：与低噪声放大器连接的两个混频支路及与锁相环二连接的两个载波驱动支路，其中，锁相环二输出的载波信号被两个载波驱动支路划分为两路本振信号，其中一路本振信号驱动I/Q混频器的I路，另一路本振信号通过移项处理后驱动I/Q混频器的Q路，低噪声放大器输出通过I/Q混频器进行变频处理后作为雷达系统基带处理模块的输入信号。
  3. 根据权利要求1或2所述的伪随机噪声雷达集成芯片，其特征在于，接收链路还包含与锁相环二输出连接用于隔离发射链路与接收链路的双工器，双工器接收锁相环二输出的载波信号，并将载波信号分别馈入发射链路的二进制相移键控调制器和接收链路中的I/Q混频器。
PCT/CN2022/110890 2021-12-25 2022-08-08 伪随机噪声雷达集成芯片 WO2023115970A1 (zh)

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