JPH0437957B2 - - Google Patents
Info
- Publication number
- JPH0437957B2 JPH0437957B2 JP59186070A JP18607084A JPH0437957B2 JP H0437957 B2 JPH0437957 B2 JP H0437957B2 JP 59186070 A JP59186070 A JP 59186070A JP 18607084 A JP18607084 A JP 18607084A JP H0437957 B2 JPH0437957 B2 JP H0437957B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- pseudo
- target
- change rate
- radar device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000005540 biological transmission Effects 0.000 claims description 13
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Classifications
-
- 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
- G01S7/38—Jamming means, e.g. producing false echoes
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Radar Systems Or Details Thereof (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
１この発明は、送信信号の周波数変化率が異なる
複数の期間で受信した目標信号の周波数分析を行
つて目標の測距を行うFMレンジング方式のレー
ダ装置に擬似目標信号を供給する擬似信号発生装
置に関するものである。[Detailed Description of the Invention] [Technical Field of the Invention] 1. The present invention relates to an FM ranging method that measures the range of a target by performing frequency analysis of a target signal received during a plurality of periods in which the frequency change rate of the transmitted signal is different. The present invention relates to a pseudo signal generating device that supplies a pseudo target signal to a radar device.
従来の擬似信号発生装置について第１図及び第
２図を用いて説明する。
A conventional pseudo signal generator will be explained with reference to FIGS. 1 and 2.
第１図はFMレンジングの原理を表す図、第２
図は従来の擬似信号発生装置の構成を示す図であ
り、図中、１は送信信号、２は受信信号、３は位
相検波信号、４は制御電圧発生器、５は電圧制御
発振器、６はミキサ、７はフイルタ、８は遅延線
である。 Figure 1 shows the principle of FM ranging, Figure 2
The figure shows the configuration of a conventional pseudo signal generator. In the figure, 1 is a transmission signal, 2 is a reception signal, 3 is a phase detection signal, 4 is a control voltage generator, 5 is a voltage controlled oscillator, and 6 is a A mixer, 7 a filter, and 8 a delay line.
まず、FMレンジングの原理を第１図を用いて
説明する。なお、説明の簡明化のため、送信信号
１は周波数変化率がゼロの区間１と周波数変化率
が〓なる一定値の区間２を周期的に繰り返すもの
とする。したがつて、区間１における送信周波数
はpなる一定値になる。このような送信信号１を
距離R〓、距離変化率R〓の目標に放射すると、距離
遅延時間Ｔ及びドラツプラ周波数１を受けた受
信信号２が受信される。ここで、距離遅延時間Ｔ
及びドツプラ周波数１はそれぞれ(1)式及び(2)式
で与えられる。 First, the principle of FM ranging will be explained using Figure 1. In order to simplify the explanation, it is assumed that the transmission signal 1 periodically repeats an interval 1 in which the frequency change rate is zero and an interval 2 in which the frequency change rate is a constant value. Therefore, the transmission frequency in section 1 is a constant value p . When such a transmission signal 1 is emitted to a target having a distance R〓 and a distance change rate R〓, a reception signal 2 having a distance delay time T and a Drappler frequency 1 is received. Here, distance delay time T
and Doppler frequency 1 are given by equations (1) and (2), respectively.
Ｔ＝2R／Ｃ ……(1)
１＝2Rp／Ｃ ……(2)
ただし、Ｃ：光速
次に、受信信号２を送信信号１を基準信号とし
て位相検波すると位相検波信号３が得られ、この
位相検波信号３の周波数が一定の区間３及び区間
４において周波数分析を行うと、1及び2なる周
波数を検出することができる。ここで、レーダ装
置の送信周波数変化率をとすると周波数f2は
2＝1−〓T＝12〓R／Ｃ ……(3)
であるため、次式を用いて目標距離Ｒが求められ
る。T=2R/C...(1) 1=2R p /C...(2) Where, C: Speed of light Next, when the received signal 2 is phase detected using the transmitted signal 1 as a reference signal, a phase detected signal 3 is obtained. If frequency analysis is performed in sections 3 and 4 where the frequency of this phase detection signal 3 is constant, frequencies 1 and 2 can be detected. Here, if the rate of change in the transmission frequency of the radar device is taken, the frequency f 2 is 2 = 1 −〓 T = 1 2〓 R /C ... (3) Therefore, the target distance R can be found using the following formula. .
Ｒ＝Ｃ（1−2）／2〓 ……(4)
したがつて、このようなFMレンジング方式の
レーダ装置を試験する場合等に用いられる従来の
擬似信号発生装置の構成は第２図のようになる。
第２図において、制御電圧発生器４は設定された
擬似目標の距離変化率Ｒを入力として電圧制御発
振器５の発振周波数が２式で与えられるドツプラ
周波数1になる制御電圧VCを発生する。ミキサ
６では上記レーダ装置から供給される送信信号１
と電圧制御発振器５の出力信号がミキシングされ
フイルタ７に入力される。フイルタ７でミキシン
グによるイメージ信号が除去された後、遅延線８
に入力されて擬似目標の距離Ｒに相当する距離遅
延時間Ｔが与えられ受信信号２と同一の擬似目標
信号Ｓが得られる。R=C( 1-2 )/ 2〓 ...(4) Therefore, the configuration of the conventional pseudo signal generator used for testing such FM ranging radar equipment is as shown in Figure 2. It becomes like this.
In FIG. 2, the control voltage generator 4 inputs the distance change rate R of the set pseudo target and generates a control voltage V C such that the oscillation frequency of the voltage controlled oscillator 5 becomes Doppler frequency 1 given by the following equation. In the mixer 6, the transmission signal 1 supplied from the radar device is
and the output signal of the voltage controlled oscillator 5 are mixed and input to the filter 7. After the image signal due to mixing is removed by the filter 7, the delay line 8
A distance delay time T corresponding to the distance R of the pseudo target is given, and a pseudo target signal S, which is the same as the received signal 2, is obtained.
このように、従来の擬似信号発生装置では遅延
線で距離遅延時間を与えているため擬似目標の距
離を任意に、かつ、遠距離に設定するには遅延線
のハードウエアが増大するという欠点があつた。 In this way, conventional pseudo signal generators use delay lines to provide distance delay time, so setting the distance of the pseudo target to an arbitrary and long distance requires an increase in the hardware required for the delay line. It was hot.
この発明は、送信周波数変化率を変更した直後
の時間区間においてはレーダ信号処理を行わない
というレーダ装置の特徴に着目して、上記レーダ
装置の送信周波数変化率が変更されるタイミング
に同期し擬似目標の距離変化率及び距離に応じた
ドツプラ・オフセツト信号を発生し、上記レーダ
装置から供給される送信信号とミキシングして擬
似目標信号を発生することにより、上記従来の欠
点を改善し得る擬似信号発生装置を提供せんとす
るものである。
This invention focuses on the characteristic of radar equipment that radar signal processing is not performed in the time period immediately after changing the rate of change in the transmission frequency of the radar apparatus, and provides a pseudo A pseudo signal that can improve the above conventional drawbacks by generating a Doppler offset signal according to the rate of change in distance and distance of the target and mixing it with a transmission signal supplied from the radar device to generate a pseudo target signal. The purpose is to provide a generator.
この発明について第３図及び第４図を用いて詳
述する。
This invention will be explained in detail using FIGS. 3 and 4.
第３図はこの発明の一実施例を示すブロツク構
成図、第４図はこの発明における擬似目標信号の
発生原理を表す図であり、図中、１は上記第１
図、５〜７は上記第２図に示したものと同一であ
り、９はドツプラ・オフセツト制御器、１０はタ
イミング信号、１１はドツプラ・オフセツト信
号、１２はこの発明の擬似目標信号、１３はこの
発明における位相検波信号である。 FIG. 3 is a block configuration diagram showing one embodiment of the present invention, and FIG. 4 is a diagram showing the principle of generation of the pseudo target signal in this invention.
5 to 7 are the same as those shown in FIG. 2 above, 9 is a Doppler offset controller, 10 is a timing signal, 11 is a Doppler offset signal, 12 is a pseudo target signal of the present invention, and 13 is a It is a phase detection signal in this invention.
第３図及び第４図において、ドツプラ・オフセ
ツト制御器９はレーダ装置から供給されるタイミ
ング信号１０の立上りに同期して設定された擬似
目標の距離変化率Ｒを入力とし、電圧制御発振器
５の出力信号（以下「ドツプラ・オフセツト信号
１１と呼ぶ。」）の周波数が(2)式で与えられる1に
なるような制御電圧を発生し保持する。次に、ド
ツプラ・オフセツト制御器９は設定された擬似目
標の距離Ｒ及び距離変化率Ｒを入力とし、タイミ
ング信号１０の立下りに同期してドツプラ・オフ
セツト信号１１の周波数が３式で与えられる2に
なるような制御電圧を発生し保持する。ミキサ６
では上記レーダ装置から供給される送信信号１と
ドツプラ・オフセツト信号１１がミキシングされ
フイルタ７に入力される。フイルタ７デミキシン
グによるイメージ信号が除去され、この発明の擬
似目標信号１２が得られる。 In FIGS. 3 and 4, the Doppler offset controller 9 inputs the distance change rate R of the pseudo target set in synchronization with the rise of the timing signal 10 supplied from the radar device, and the voltage controlled oscillator 5. A control voltage is generated and maintained so that the frequency of the output signal (hereinafter referred to as "Doppler offset signal 11") becomes 1 given by equation (2). Next, the Doppler offset controller 9 inputs the set distance R and distance change rate R of the pseudo target, and in synchronization with the falling edge of the timing signal 10, the frequency of the Doppler offset signal 11 is given by the formula 3. Generates and maintains a control voltage such that the voltage becomes 2 . mixer 6
Then, the transmission signal 1 and Doppler offset signal 11 supplied from the radar device are mixed and input to the filter 7. The image signal resulting from the demixing by the filter 7 is removed, and the pseudo target signal 12 of the present invention is obtained.
なお、この発明の擬似目標信号１２が上記レー
ダ装置に入力されて位相検波されると、第４図に
示すようなこの発明における位相検波信号１３が
得られる。この信号波形は第１図に示した位相検
波信号３の波形と異なるが、レーダ装置が周波数
分析を行う区間３及び区間４においては同一の波
形である。 Incidentally, when the pseudo target signal 12 of the present invention is input to the radar device and subjected to phase detection, a phase detection signal 13 of the present invention as shown in FIG. 4 is obtained. Although this signal waveform is different from the waveform of the phase detection signal 3 shown in FIG. 1, it is the same waveform in sections 3 and 4 in which the radar device performs frequency analysis.
以上述べたように、この発明によればハードウ
エア規模の大きい遅延線を用いることなく、所望
の距離及び距離変化率の擬似目標信号を発生する
ことができる。
As described above, according to the present invention, a pseudo target signal having a desired distance and distance change rate can be generated without using a delay line with large hardware scale.
第１図はFMレンジングの原理を表す図、第２
図は従来の擬似信号発生装置の構成を示す図、第
３図はこの発明の一実施例を示すブロツク構成
図、第４図はこの発明における擬似目標信号の発
生原理を表わす図であり、図中、１は送信信号、
２は受信信号、３は位相検波信号、４は制御電圧
発生器、５は電圧制御発振器、６はミキサ、７は
フイルタ、８は遅延線、９はドツプラ・オフセツ
ト制御器、１０はタイミング信号、１１はドツプ
ラ・オフセツト信号、１２はこの発明の擬似目標
信号、１３はこの発明における位相検波信号であ
る。なお、図中、同一あるいは相当部分には同一
符号を付して示してある。
Figure 1 shows the principle of FM ranging, Figure 2
3 is a block diagram showing an embodiment of the present invention, and FIG. 4 is a diagram showing the principle of generating a pseudo target signal in the present invention. Inside, 1 is the transmission signal,
2 is a received signal, 3 is a phase detection signal, 4 is a control voltage generator, 5 is a voltage controlled oscillator, 6 is a mixer, 7 is a filter, 8 is a delay line, 9 is a Doppler offset controller, 10 is a timing signal, 11 is a Doppler offset signal, 12 is a pseudo target signal of this invention, and 13 is a phase detection signal of this invention. In the drawings, the same or corresponding parts are denoted by the same reference numerals.
Claims (1)
で受信した目標信号の周波数分折を行つて目標の
測距を行うFMレンジング方式のレーダ装置に擬
似目標信号を供給する擬似信号発生装置におい
て、所望の目標距離と距離変化率及び上記レーダ
装置の送信周波数変化率に応じた制御電圧を送信
周波数変化率が変更されるタイミングに同期して
発生するドツプラ・オフセツト制御器と、上記制
御電圧に対応した周波数のドツプラ・オフセツト
信号を発生する電圧制御発振器と、ドツプラ・オ
フセツト信号と上記レーダ装置の送信信号をミキ
シングするミキサと、上記ミキシングにより発生
するイメージ信号を除去するフイルタを具備した
擬似信号発生装置。1. In a pseudo signal generation device that supplies a pseudo target signal to an FM ranging radar device that performs frequency analysis on a target signal received during multiple periods in which the frequency change rate of the transmitted signal is different to measure the range of the target, a Doppler offset controller that generates a control voltage corresponding to the target distance and distance change rate of the radar device and the transmission frequency change rate of the radar device in synchronization with the timing when the transmission frequency change rate is changed; A pseudo signal generator comprising: a voltage controlled oscillator that generates a frequency Doppler offset signal; a mixer that mixes the Doppler offset signal with a transmission signal of the radar device; and a filter that removes an image signal generated by the mixing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59186070A JPS6165179A (en) | 1984-09-05 | 1984-09-05 | False signal generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59186070A JPS6165179A (en) | 1984-09-05 | 1984-09-05 | False signal generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6165179A JPS6165179A (en) | 1986-04-03 |
| JPH0437957B2 true JPH0437957B2 (en) | 1992-06-22 |
Family
ID=16181858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59186070A Granted JPS6165179A (en) | 1984-09-05 | 1984-09-05 | False signal generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6165179A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2189809A1 (en) * | 2008-11-24 | 2010-05-26 | Mitsubishi Electric R&D Centre Europe B.V. | Object ranging |
| JP6019795B2 (en) * | 2012-06-21 | 2016-11-02 | 日本電気株式会社 | Radar apparatus, target data acquisition method, and target tracking system |
| JP2018084450A (en) * | 2016-11-22 | 2018-05-31 | 三菱電機株式会社 | Radar device |
| CN111505589B (en) * | 2020-04-21 | 2022-03-11 | 湖南赛博诺格电子科技有限公司 | Inter-pulse coherent false target interference method and device and computer equipment |
-
1984
- 1984-09-05 JP JP59186070A patent/JPS6165179A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6165179A (en) | 1986-04-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5864313A (en) | Process for determining the intermediate frequency deviation in frequency pulsed radar systems | |
| GB1299023A (en) | Improvements in or relating to spectrum analysers | |
| JPH0437957B2 (en) | ||
| GB2110826A (en) | Methods and apparatus for frequency response analysis | |
| GB958960A (en) | Improvements in or relating to radar systems | |
| GB582492A (en) | Improvements in or relating to apparatus for comparing the phase or time delay between two waves, and to distance measuring devices | |
| JPS54137217A (en) | Facsimile device | |
| SU883786A1 (en) | Device for signal non-synchronism determination | |
| SU866752A2 (en) | Device for retuning generator frequency | |
| SU800674A1 (en) | Sound velocity meter | |
| JPS5555269A (en) | Internal insulation diagnosis device of power apparatus | |
| US2987676A (en) | Pulse generator | |
| SU871300A2 (en) | Method of measuring delay time and its didpersion in ultrasonic delay line | |
| SU849463A2 (en) | M-sequence generator | |
| SU1005042A1 (en) | Random pulse burst generator | |
| SU1339486A1 (en) | Device for measuring group time lag of delay line | |
| SU924915A1 (en) | Device for shaping circular figures on television raster | |
| SU771585A1 (en) | Device for calibrating delay arrangement with aid of time marks | |
| JPS62175685A (en) | Underground buried object probe | |
| SU1161893A1 (en) | Phase-meter of radio pulse signals | |
| JPH0227286A (en) | Sampling method and apparatus of underground radar | |
| JPH0331769A (en) | Frequency measuring device | |
| SU801049A1 (en) | Device for reproducing frequency-modulated signals | |
| SU997243A2 (en) | Pulse detctor | |
| SU819980A1 (en) | Synchronizing device |