JPWO2016051438A1 - 信号生成回路 - Google Patents
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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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/35—Details of non-pulse systems
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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
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/06—Systems determining position data of a target
- G01S13/08—Systems for measuring distance only
- G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
- G01S13/34—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
-
- 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
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/06—Systems determining position data of a target
- G01S13/08—Systems for measuring distance only
- G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
- G01S13/34—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
- G01S13/343—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal using sawtooth modulation
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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
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/06—Systems determining position data of a target
- G01S13/08—Systems for measuring distance only
- G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
- G01S13/34—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
- G01S13/345—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal using triangular modulation
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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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
-
- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
- G01S7/4008—Means for monitoring or calibrating of parts of a radar system of transmitters
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B23/00—Generation of oscillations periodically swept over a predetermined frequency range
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/08—Details of the phase-locked loop
- H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
- H03L7/093—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using special filtering or amplification characteristics in the loop
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
- H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
- H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
- H03L7/183—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number
- H03L7/191—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number using at least two different signals from the frequency divider or the counter for determining the time difference
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B2001/6912—Spread spectrum techniques using chirp
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
Description
変調制御回路は、LUTのV−F特性から、チャープ信号の時間―周波数特性が線形になるような制御電圧を求め、その制御電圧をデジタル信号としてDACに出力する。
VCOは、制御電圧にしたがって、チャープ信号(f1)を生成する。
ローカル信号生成回路は、ローカル信号(f2)を生成する。
差周波信号生成回路は、VCOの出力信号(f1)と、ローカル信号生成回路で生成されたローカル信号(f2)とから、VCOの出力信号とローカル信号の差周波成分であるIF(Intermediate Frequency)信号(f1−f2)を出力する。
図1は、実施の形態1に係る信号生成回路の一構成例を示す構成図である。
本信号生成回路は、VCO(Voltage Controlled Oscillator)100、DAC(Digital to Analog Converter)105、LPF(Low Pass Filter)110、分周器115、乗算器140、局部発振器150、LPF160、ADC(Analog To Digital Converter)170、MCU(Micro Controller Unit)180を備える。図1において、vはVCO100の制御電圧であり、fvcoはVCO100の出力信号の周波数(出力周波数)であり、fxoは局部発振器150の出力周波数である。IN_MCUはMCUへの入力信号を示し、OUT_MCUはMCUからの出力信号を示す。
実施の形態1では、直交復調部200から出力される信号に対して、LPF210、LPF211を用いて、高周波成分(不要波成分)を除去し、差周波成分(所望波成分)を抽出する構成を示した。実施の形態2では、LPF210、LPF211を用いず、所望波成分を抽出する構成を示す。
なお、図7中、図1と同一符号は同一又は相当部分を示し、説明を省略する。図7中、Iは分周器116から出力される同相信号を示し、Qは分周器116から出力される直交信号を示す。IN_MCU_Iは、MCU181に入力される同相信号を示し、IN_MCU_QはMCU181に入力される直交信号を示し、OUT_MCUは、MCU181から出力される信号を示す。
実施の形態1の構成と比べて、実施の形態2のMCU181は、直交復調部200の代わりに第1の直交復調部200a及び第2の直交復調部200bを備え、加算器213及び減算器216を追加し、LPF210、LPF211を省略している点が異なる。
DAC105、LPF110、VCO100及び局部発振器150の動作は、実施の形態1と同じであるため、説明を省略する。
実施の形態1では、MCU180内に直交復調部200を設けた構成について示した。実施の形態3では、MCU180内の直交復調部200を削除し、MCU180の外に直交復調部200をアナログ回路として設けた構成を示す。
なお、図9中、図1と同一符号は同一又は相当部分を示し、説明を省略する。図9中、IN_MCU_Iは、MCU182に入力される同相信号を示し、IN_MCU_QはMCU182に入力される直交信号を示し、OUT_MCUは、MCU181から出力される信号を示す。
実施の形態1の構成と比べて、実施の形態2のMCU182は、直交復調部200を備えない点が異なる。
DAC105、LPF110、VCO100、分周器115の動作は、実施の形態1と同じであるため、説明を省略する。
Claims (9)
- 電圧に対する出力周波数の特性を示す電圧周波数特性を用いて、制御電圧を設定する制御電圧設定部と、
前記制御電圧により出力信号の周波数を変化させる電圧制御発振器と、
前記電圧制御発振器の出力信号を直交復調し、互いに直交する同相信号と直交信号を生成する直交復調部と、
前記同相信号及び前記直交信号に基づいて、前記電圧制御発振器の出力信号の周波数を検出する周波数検出部と、
を備え、
前記制御電圧設定部は、前記制御電圧と前記電圧制御発振器の出力信号の周波数との関係から導出した前記電圧周波数特性を用いて、前記制御電圧を補正し、
前記電圧制御発振器は、前記制御電圧設定部により補正された前記制御電圧に基づいて、チャープ信号を生成する信号生成回路。 - 前記電圧制御発振器の出力信号を分周する分周器
を備え、
前記直交復調部は、前記分周器により分周された前記電圧制御発振器の出力信号を直交復調することを特徴とする請求項1に記載の信号生成回路。 - 前記電圧制御発振器の出力信号を分周する分周器と、
前記分周器の出力信号の周波数を変化させる周波数変換回路と、
を備え、
前記直交復調部は、前記周波数変換回路により周波数変換された前記電圧制御発振器の出力信号を直交復調することを特徴とする請求項1に記載の信号生成回路。 - 前記分周器は、分周された信号として、互いに直交する同相信号と直交信号とを出力することを特徴とする請求項2又は請求項3に記載の信号生成回路。
- 前記同相信号及び前記直交信号から位相を検出する位相検出部
を備え、
前記周波数検出部は、前記位相検出部が検出した位相に基づいて、前記電圧制御発振器の出力信号の周波数を検出することを特徴とする請求項1から請求項4のいずれか1項に記載の信号生成回路。 - 前記位相検出部は、前記直交信号を前記同相信号により除算し、逆正接を計算することより、位相を検出することを特徴とする請求項5記載の信号生成回路。
- 前記周波数検出部は、前記位相検出部が検出した位相を時間微分して得られた周波数に基づいて、前記電圧制御発振器の出力信号の周波数を検出することを特徴とする請求項5又は請求項6に記載の信号生成回路。
- 前記直交復調部、前記位相検出部、前記周波数検出部、及び前記制御電圧設定部はマイクロコントローラユニットで構成されたことを特徴とする請求項5から請求項7のいずれか1項に記載の信号生成回路。
- 前記制御電圧設定部は、前記電圧制御発振器の前記電圧周波数特性を保存するルックアップテーブルを有し、前記ルックアップテーブルに基づいて、前記制御電圧を設定することを特徴とする請求項1から請求項8のいずれか1項に記載の信号生成回路。
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US (1) | US10585169B2 (ja) |
EP (1) | EP3203260A4 (ja) |
JP (1) | JP6381656B2 (ja) |
CN (2) | CN106796288A (ja) |
WO (1) | WO2016051438A1 (ja) |
Families Citing this family (11)
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WO2016132520A1 (ja) | 2015-02-19 | 2016-08-25 | 三菱電機株式会社 | Fm-cwレーダおよびfm-cw信号の生成方法 |
US10393861B2 (en) | 2016-04-05 | 2019-08-27 | Mitsubishi Electric Corporation | Frequency modulation circuit, FM-CW radar, and high-speed modulation radar |
CN109196375B (zh) * | 2016-05-16 | 2023-06-30 | 三菱电机株式会社 | Fm-cw雷达以及fm-cw信号的生成方法 |
EP3343774B1 (en) * | 2016-12-30 | 2020-07-22 | Nxp B.V. | Digitally controlled oscillator |
CN107561516B (zh) * | 2017-08-29 | 2019-09-13 | 纵目科技(厦门)有限公司 | 一种雷达快速校正发射频率的方法 |
DE202017107202U1 (de) | 2017-11-28 | 2019-04-04 | Weidmüller Interface GmbH & Co. KG | Anschlussvorrichtung zum Anschluss eines Leiterendes |
JPWO2020003349A1 (ja) * | 2018-06-25 | 2021-06-24 | 株式会社ソシオネクスト | 周波数掃引回路およびレーダー装置 |
CN109581376B (zh) * | 2018-12-26 | 2021-02-09 | 北京遥测技术研究所 | 一种用于安检成像的vco扫频非线性校正方法 |
JP7261077B2 (ja) * | 2019-04-23 | 2023-04-19 | 日本電波工業株式会社 | Pll装置 |
US11372095B2 (en) * | 2019-07-24 | 2022-06-28 | Nxp B.V. | Phase-adjustable injection-locking |
CN114665918B (zh) * | 2022-03-25 | 2023-10-27 | 深圳市力合微电子股份有限公司 | 一种具有纠错能力的多斜率Chirp信号生成及解扩方法 |
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US10585169B2 (en) | 2020-03-10 |
JP6381656B2 (ja) | 2018-08-29 |
EP3203260A1 (en) | 2017-08-09 |
CN114978161A (zh) | 2022-08-30 |
CN106796288A (zh) | 2017-05-31 |
US20170285139A1 (en) | 2017-10-05 |
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WO2016051438A1 (ja) | 2016-04-07 |
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