JPH0421826B2 - - Google Patents
Info
- Publication number
- JPH0421826B2 JPH0421826B2 JP57063565A JP6356582A JPH0421826B2 JP H0421826 B2 JPH0421826 B2 JP H0421826B2 JP 57063565 A JP57063565 A JP 57063565A JP 6356582 A JP6356582 A JP 6356582A JP H0421826 B2 JPH0421826 B2 JP H0421826B2
- Authority
- JP
- Japan
- Prior art keywords
- azimuth
- waveform data
- circuit
- output
- waveform
- 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
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
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
- G01S3/14—Systems for determining direction or deviation from predetermined direction
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (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〕
この発明は到来電波の方位を測定する装置に関
する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a device for measuring the direction of incoming radio waves.
従来、到来電波の方位を測定するにはゴニオメ
ータの出力信号を受信機で復調し、この復調出力
信号を表示器に表示して操作者が方位を決定して
いた。即ち、受信機から出力される方位波形は例
えば第１図に一点波線１１で示すような信号とな
されており、この信号はアナログ／デイジタル変
換回路に供給されて所定方位角毎に量子化され
る。この量子化された信号は第１図に示す如く方
位角に対応した方位波形データ１２として表示器
上に表示される。この方位波形データ１２は操作
者により表示器上で目視され、方位波形の最低レ
ベルに対応する方位角Ｄが読取られて電波の到来
方向が測定される。したがつて、このような従来
の方法では最終的な方位測定を操作者の目測に頼
つているため、混信等で信号の質が悪い場合には
測定誤差が大きく、また、迅速な測定を行なうこ
とが困難であるなどの欠点を有している。
Conventionally, in order to measure the direction of incoming radio waves, the output signal of a goniometer is demodulated by a receiver, and this demodulated output signal is displayed on a display so that an operator can determine the direction. That is, the azimuth waveform output from the receiver is, for example, a signal as shown by the dotted dashed line 11 in FIG. 1, and this signal is supplied to an analog/digital conversion circuit and quantized for each predetermined azimuth angle. . This quantized signal is displayed on the display as azimuth waveform data 12 corresponding to the azimuth, as shown in FIG. This azimuth waveform data 12 is visually viewed by the operator on a display, and the azimuth angle D corresponding to the lowest level of the azimuth waveform is read to measure the arrival direction of the radio wave. Therefore, these conventional methods rely on the operator's visual measurement for the final direction measurement, which can lead to large measurement errors if the signal quality is poor due to interference, etc., and it is difficult to perform quick measurements. It has the disadvantage that it is difficult to
この発明は上記事情に基づいてなされたもの
で、その目的とするところは電波の到来方向を操
作者の目測によらず計算によつて求めることによ
り、測定時間を短縮し得るとともに測定確度を向
上し得る方位測定装置を提供しようとするもので
ある。
This invention was made based on the above circumstances, and its purpose is to shorten measurement time and improve measurement accuracy by determining the direction of arrival of radio waves by calculation rather than by visual estimation by the operator. The aim is to provide a direction measuring device that can
この発明はゴニオメータの復調出力を量子化し
て得られる方位波形データを例えば所定期間平均
して雑音およびレベル変動を除去した後、この方
位波形データと基準の方位波形データとの相関値
を求め、この相関値より電波到来方向を求めるも
のである。
In this invention, the azimuth waveform data obtained by quantizing the demodulated output of a goniometer is averaged over a predetermined period to remove noise and level fluctuations, and then a correlation value between this azimuth waveform data and reference azimuth waveform data is determined. The direction of arrival of radio waves is determined from the correlation value.
以下、この発明の一実施例について図面を参照
して説明する。
An embodiment of the present invention will be described below with reference to the drawings.
第２図において、図示せぬゴニオメータより出
力される信号fWは周波数情報等の受信諸元fDとと
もに受信機２１に供給され復調される。この受信
機２１の出力信号はＡ／Ｄ変換回路２２に供給さ
れ、所定角度毎に量子化される。この量子化され
た方位波形データは演算回路２３に供給され、こ
の演算回路２３において例えば各角度毎に方位波
形データの平均値が演算される。即ち、この演算
回路２３には１演算期間前の平均値データがメモ
リ２４より供給され、この平均値データとＡ／Ｄ
変換器２２より供給された方位波形データとの平
均値が演算される。このも求められた平均値デー
タは前記メモリ２４に各角度毎に記憶される。こ
の演算が所定期間繰返され、第３図a1，a2〜aoに
示す複数の方位波形データより雑音およびレベル
変動等が除去されて同図ｂに示す如く平均化され
た方位波形データが出力される。尚、第３図にお
いて、各波形は説明の便宜上アナログ信号波形と
して示す。 In FIG. 2, a signal f W output from a goniometer (not shown) is supplied to a receiver 21 together with receiving specifications f D such as frequency information, and is demodulated. The output signal of this receiver 21 is supplied to an A/D conversion circuit 22 and quantized for each predetermined angle. This quantized azimuth waveform data is supplied to an arithmetic circuit 23, which calculates the average value of the azimuth waveform data for each angle, for example. That is, average value data from one calculation period ago is supplied to this calculation circuit 23 from the memory 24, and this average value data and the A/D
The average value of the azimuth waveform data supplied from the converter 22 is calculated. The obtained average value data is stored in the memory 24 for each angle. This calculation is repeated for a predetermined period of time, and noise and level fluctuations are removed from the multiple azimuth waveform data shown in Figure 3 a1 , a2 to ao , and the averaged azimuth waveform data as shown in Figure 3b is obtained. Output. In FIG. 3, each waveform is shown as an analog signal waveform for convenience of explanation.
一方、２５は各電波の周波数等の受信諸元に対
応した方位波形データ、即ち、複数の基準方位波
形データをデイジタル信号として記憶する基準パ
ターンメモリである。この基準パターンメモリ２
５には前記到来電波の受信諸元fD、例えば周波数
や帯域幅等の情報が供給され、この周波数や帯域
幅な情報に対応した基準方位波形データ（第３図
ｃに示す）が読出される。この基準方位波形デー
タおよび前記平均化された方位波形データは相関
回路２６に供給され、両方位波形データの相関値
が第３図ｄに示す如く求められる。この相関値は
判定回路２７に供給され、この判定回路２７にお
いて相関値の最大値が判定され、この最大値に対
応した方位角（第３図ｄに矢印で示す）が到来電
波の方向として出力される。即ち、到来電波の方
位波形データは方位角に対応して量子化されてい
るから、相関回路２６より出力された相関値も方
位角に対応されており、この相関値の最大値を判
定することにより到来電波の方位角が求められ
る。 On the other hand, 25 is a reference pattern memory that stores azimuth waveform data corresponding to reception specifications such as the frequency of each radio wave, that is, a plurality of reference azimuth waveform data as digital signals. This reference pattern memory 2
5 is supplied with reception specifications f D of the incoming radio wave, such as frequency and bandwidth information, and reference azimuth waveform data (shown in FIG. 3 c) corresponding to this frequency and bandwidth information is read out. Ru. This reference azimuth waveform data and the averaged azimuth waveform data are supplied to a correlation circuit 26, and a correlation value of both azimuth waveform data is determined as shown in FIG. 3d. This correlation value is supplied to the determination circuit 27, which determines the maximum value of the correlation value, and outputs the azimuth (indicated by the arrow in Figure 3 d) corresponding to this maximum value as the direction of the incoming radio wave. be done. That is, since the azimuth waveform data of the incoming radio wave is quantized in correspondence with the azimuth, the correlation value output from the correlation circuit 26 also corresponds to the azimuth, and the maximum value of this correlation value is determined. The azimuth angle of the incoming radio wave can be found by
上記構成によれば、量子化された方位波形デー
タを所定期間にわたり平均化し、この平均化され
た方位波形データと受信諸元（少なくとも受信周
波数）に対応した基準方位波形データとの相関値
を求め、この相関値より到来電波の方向を求めて
いる。したがつて、従来のように操作者が目測に
より到来方向を測定する場合に比べて、測定の確
度を向上することができるとともに、操作者の労
力を軽減することが可能である。 According to the above configuration, the quantized azimuth waveform data is averaged over a predetermined period, and the correlation value between the averaged azimuth waveform data and the reference azimuth waveform data corresponding to the reception specifications (at least the reception frequency) is determined. , the direction of the incoming radio wave is determined from this correlation value. Therefore, compared to the conventional case in which an operator measures the direction of arrival visually, it is possible to improve the accuracy of measurement and to reduce the labor required by the operator.
また、量子化された方位波形データを平均化し
て雑音やレベル変動を改善しているため、混信等
で質の悪い信号に対しても測定誤差を減少するこ
とが可能である。 Furthermore, since the quantized azimuth waveform data is averaged to improve noise and level fluctuations, it is possible to reduce measurement errors even for signals of poor quality due to interference or the like.
尚、上記実施例では演算回路２３において方位
波形データの平均値を求めたが、これらに限ら
ず、例えば方位波形データの各角度毎の最大値を
所定期間にわたつて求め、この最大値の集合とさ
れた方位波形データと基準方位波形データとの相
関値を求めてもよい。但しこの場合基準方位波形
データも最大値で表わす必要がある。 In the above embodiment, the average value of the azimuth waveform data is calculated in the arithmetic circuit 23, but the invention is not limited to this. For example, the maximum value for each angle of the azimuth waveform data is calculated over a predetermined period, and a set of these maximum values is calculated. A correlation value between the azimuth waveform data and the reference azimuth waveform data may be obtained. However, in this case, the reference azimuth waveform data also needs to be expressed with the maximum value.
その他、この発明の要旨を変えない範囲で種種
変形実施可能なことは勿論である。 It goes without saying that other modifications can be made without departing from the gist of the invention.
以上、詳述したようにこの発明によれば、電波
到来方向を操作者の目測によらず、計算によつて
求めることにより、測定時間を短縮し得るととも
に測定確度を向上し得る方位測定装置を提供でき
る。
As described in detail above, according to the present invention, there is provided an azimuth measuring device that can shorten measurement time and improve measurement accuracy by determining the direction of arrival of radio waves through calculation rather than visual measurement by the operator. Can be provided.
第１図は従来の方位測定方法を説明するために
示す図、第２図はこの発明に係わる方位測定装置
の一実施例を示す構成図、第３図a1乃至aoおよび
ｂ，ｃ，ｄはそれぞれ第２図の動作を説明するた
めに示す図である。
２１……受信機、２３……Ａ／Ｄ変換回路、２
３……演算回路、２４……メモリ、２５……基準
パターンメモリ、２６……相関回路、２７……判
定回路。
FIG. 1 is a diagram shown to explain a conventional direction measuring method, FIG. 2 is a configuration diagram showing an embodiment of a direction measuring device according to the present invention, and FIG. d is a diagram shown for explaining the operation of FIG. 2; 21...Receiver, 23...A/D conversion circuit, 2
3... Arithmetic circuit, 24... Memory, 25... Reference pattern memory, 26... Correlation circuit, 27... Judgment circuit.
Claims (1)
して受信された電波を所定の方位角に量子化され
た方位波形データとして出力する回路と、この出
力された方位波形データを所定期間にわたり演算
し雑音およびレベル変動が除去された方位波形デ
ータを出力する演算手段と、少なくとも受信周波
数に対応した複数の基準方位波形データを記憶す
る記憶手段と、この記憶手段で記憶され受信周波
数に対応した基準の方位波形データと前記演算手
段から出力される方位波形データとの相関値を求
める回路と、この求められた相関値のうち最大値
がとる方位角データを出力する回路とを具備した
ことを特徴とする方位測定装置。1 A circuit that outputs the radio waves received by the goniometer as an azimuth versus level signal as azimuth waveform data quantized to a predetermined azimuth, and calculates this output azimuth waveform data over a predetermined period to eliminate noise and level fluctuations. a calculation means for outputting azimuth waveform data from which azimuth has been removed; a storage means for storing a plurality of reference azimuth waveform data corresponding to at least the receiving frequency; An azimuth measuring device comprising: a circuit for obtaining a correlation value with the azimuth waveform data output from the calculation means; and a circuit for outputting azimuth data having the maximum value among the obtained correlation values. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6356582A JPS58180967A (en) | 1982-04-16 | 1982-04-16 | Bearing measuring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6356582A JPS58180967A (en) | 1982-04-16 | 1982-04-16 | Bearing measuring apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58180967A JPS58180967A (en) | 1983-10-22 |
| JPH0421826B2 true JPH0421826B2 (en) | 1992-04-14 |
Family
ID=13232882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6356582A Granted JPS58180967A (en) | 1982-04-16 | 1982-04-16 | Bearing measuring apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58180967A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4798531B2 (en) * | 2005-11-11 | 2011-10-19 | 独立行政法人土木研究所 | Receiver station, signal transmission / reception system using it |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6014310B2 (en) * | 1980-03-28 | 1985-04-12 | 日本電気株式会社 | Direction measuring device |
-
1982
- 1982-04-16 JP JP6356582A patent/JPS58180967A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58180967A (en) | 1983-10-22 |
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