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    • 51. 发明公开
    • SIGNAL-GENERATING CIRCUIT
    • 信号发生电路
    • EP3203260A1
    • 2017-08-09
    • EP14903322.7
    • 2014-10-03
    • Mitsubishi Electric Corporation
    • HIGUCHI, KazuhideANDO, NobuhikoTSUTSUMI, KojiMIZUTANI, HiroyukiHIEDA, Morishige
    • G01S13/34G01S7/40
    • G01S7/35G01S7/40G01S7/4008G01S13/34G01S13/343G01S13/345H03B23/00H03L7/093H03L7/18H03L7/191H04B2001/6912
    • A conventional signal generating circuit has a problem of being unable to compensate for an error of a chirp signal when V-F characteristics of a VCO change suddenly owing to disturbance. A signal generating circuit of the invention includes a control voltage setting unit (CVSU) configured to set a control voltage for a chirp signal using voltage-frequency characteristics indicating characteristics of an output frequency versus voltage; a VCO configured to alter the frequency of its output signal by the control voltage; a quadrature demodulator configured to perform quadrature demodulation of the output signal of the VCO to generate an inphase signal and a quadrature signal orthogonal to each other; and a frequency detector configured to detect the frequency of the output signal of the VCO on the basis of the inphase signal and quadrature signal. The CVSU corrects the control voltage by using the voltage-frequency characteristics derived from relationships between the control voltage and the frequency of the output signal of the VCO. The VCO generates the chirp signal based on the control voltage corrected by the CVSU.
    • 传统的信号发生电路具有当VCO的V-F特性由于干扰而突然变化时不能补偿线性调频信号的误差的问题。 本发明的信号生成电路包括控制电压设置单元(CVSU),其被配置为使用指示输出频率对电压的特性的电压 - 频率特性来设置用于啁啾信号的控制电压; VCO,被配置为通过控制电压改变其输出信号的频率; 正交解调器,被配置为执行VCO的输出信号的正交解调以生成彼此正交的同相信号和正交信号; 以及频率检测器,被配置为基于同相信号和正交信号来检测VCO的输出信号的频率。 CVSU通过使用由控制电压与VCO的输出信号的频率之间的关系导出的电压 - 频率特性来校正控制电压。 VCO根据CVSU校正的控制电压产生啁啾信号。
    • 53. 发明公开
    • SYSTEM AND METHOD FOR TESTING FREQUENCY SYNTHESIZER
    • 系统VERFAHREN ZUM TESTEN EINES FREQUENZSYNTHESIZERS
    • EP2959586A4
    • 2016-10-12
    • EP13875602
    • 2013-11-11
    • ISRAEL AEROSPACE IND LTD
    • GREENBERG IGALLEVY RAPHAEL
    • H03L7/00G01S7/40
    • G01S7/4008G01S13/282G01S13/34G01S2007/4065
    • A method of testing a frequency synthesizer over a predetermined frequency range using a delay unit complying with a spectral delay distribution model modeling a spectral delay distribution of the delay unit over the predetermined frequency range. The method comprises generating at least one test signal with the frequency synthesizer according to at least one test command; passing the at least one test signal through the delay unit so as to obtain at least one delayed test signal; measuring at least one shift of a signal attribute between the delayed test signal and the test signal; estimating an accuracy of the frequency synthesizer by comparing the at least one measured shift with an expected shift, the expected shift being derived from the spectral delay distribution model of the delay unit and from the at least one test command.
    • 一种使用延迟单元在预定频率范围内测试频率合成器的方法,所述延迟单元遵循在预定频率范围内建模延迟单元的频谱延迟分布的频谱延迟分布模型。 该方法包括根据至少一个测试命令与频率合成器产生至少一个测试信号; 将所述至少一个测试信号通过所述延迟单元,以获得至少一个延迟的测试信号; 测量延迟的测试信号和测试信号之间的信号属性的至少一个移位; 通过将所述至少一个测量的移位与预期移位进行比较来估计所述频率合成器的精度,所述预期偏移是从所述延迟单元的频谱延迟分布模型和所述至少一个测试命令导出的。
    • 58. 发明公开
    • PULSE COMPRESSION RADAR
    • RADAR MIT IMPULSKOMPRESSION
    • EP2899562A1
    • 2015-07-29
    • EP13839318.6
    • 2013-09-10
    • Furuno Electric Co., Ltd.
    • ASADA, YasunobuOKIMOTO, Takuya
    • G01S7/282G01S7/40G01S13/28
    • G01S7/282G01S7/4004G01S7/4008G01S13/28H03F1/3247H03F3/24
    • A pulse compression radar for performing pre-distortion is provided, which has a configuration simplified in circuit structure. A radar apparatus (pulse compression radar) 1 includes an antenna 10 configured to externally transmit a transmission signal transmitted by a power amplifier 16 and receive a reflection signal caused thereby as a reception signal. The radar apparatus 1 includes a reception circuit 41 configured to propagate this reception signal to a radar image creating module 26. The radar apparatus 1 corrects beforehand, by utilizing the transmission signal (feedback signal) transmitted from the power amplifier 16, a transmission signal to be inputted into the power amplifier 16 so as to cancel distortion of the transmission signal caused by amplification effect of the power amplifier 16. Further, a circuit where the reception signal passes and a circuit where the feedback signal passes share a part of each other.
    • 提供了用于执行预失真的脉冲压缩雷达,其具有电路结构简化的结构。 雷达装置(脉冲压缩雷达)1包括:外部发送由功率放大器16发送的发送信号的天线10,接收由此产生的反射信号作为接收信号。 雷达装置1包括被配置为将该接收信号传播到雷达图像生成模块26的接收电路41.雷达装置1通过利用从功率放大器16发送的发送信号(反馈信号)来预先校正发送信号 输入到功率放大器16,以消除由功率放大器16的放大效应引起的发送信号的失真。此外,接收信号通过的电路和反馈信号通过的电路共享一部分。