JPH0456265B2 - - Google Patents
Info
- Publication number
- JPH0456265B2 JPH0456265B2 JP58180500A JP18050083A JPH0456265B2 JP H0456265 B2 JPH0456265 B2 JP H0456265B2 JP 58180500 A JP58180500 A JP 58180500A JP 18050083 A JP18050083 A JP 18050083A JP H0456265 B2 JPH0456265 B2 JP H0456265B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- output
- signal processing
- wave
- arrival
- 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
- G01S3/04—Details
- G01S3/046—Displays or indicators
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Manipulation Of Pulses (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明はドプラ方探等、到来電波の方位表示を
行なう場合の信号処理装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a signal processing device for displaying the direction of incoming radio waves, such as in a Doppler direction search.
第１図は従来のドプラ方探の一例を示す。すな
わち、アンテナ走査器１のドプラ効果によつて得
られたFM信号は、受信機２、リミツタ３を介
し、FM復調器４によつてFM信号が復調される。
この復調信号はバンドパスフイルタ（以下BPF
と称する）５により、不要波が除去された第３図
ａに示すような信号S1となる。このBPF５の出
力信号S1は全波整流回路６により全波整流され
て第３図ｂに示すような信号S2となり、直流加
算器７に加えられる。この直流加算器７では直流
の加算が行われ第３図ｃに示すような信号S3と
なり乗算器８に加えられる。この乗算器８ではア
ンテナ走査器１からの正弦・余弦信号S4と乗算
され、指示器９に180°方位の異なつたプロペラ波
形として、その方位が表示される。
FIG. 1 shows an example of a conventional Doppler search. That is, the FM signal obtained by the Doppler effect of the antenna scanner 1 is demodulated by the FM demodulator 4 via the receiver 2 and the limiter 3.
This demodulated signal is passed through a bandpass filter (hereinafter referred to as BPF).
) 5, a signal S1 as shown in FIG. 3a from which unnecessary waves have been removed is obtained. The output signal S1 of the BPF 5 is full-wave rectified by a full-wave rectifier circuit 6 to become a signal S2 as shown in FIG. This DC adder 7 performs DC addition, resulting in a signal S3 as shown in FIG. 3c, which is added to the multiplier 8. This multiplier 8 multiplies the sine/cosine signal S4 from the antenna scanner 1, and the indicator 9 displays the azimuth as a propeller waveform with a 180° azimuth difference.
しかしながら、指示器９の表示波形は、180°方
位の異なつた２つのピークを持ついわゆるプロペ
ラ波形であり、180°異なる２つの方位のうちどち
らが真の方位であるかを知るには、操作員がスイ
ツチ１０をオン（ON）し、BPF５の出力に対応
した指示器９の表示から真の方位を判別するセン
スの決定が必要であり、その操作は運用上の妨げ
になると共に、誤方探の原因にもなる。 However, the displayed waveform of the indicator 9 is a so-called propeller waveform with two peaks at 180° different azimuths, and in order to know which of the two 180° azimuths is the true heading, the operator must It is necessary to turn on the switch 10 and determine the true direction from the display of the indicator 9 that corresponds to the output of the BPF 5. This operation is not only a hindrance to the operation, but also makes it difficult to find the wrong direction. It can also be a cause.
本発明は上記の事情に鑑みてなされたもので、
センスの決定操作を不要にすると共に、到来方位
にのみ尖鋭な単一ピーク波形の表示を可能にする
ことにより、表示方位の直読を可能ならしめる信
号処理装置を提供することを目的とする。
The present invention was made in view of the above circumstances, and
It is an object of the present invention to provide a signal processing device that makes it possible to directly read a displayed direction by eliminating the need for a sense determination operation and displaying a sharp single peak waveform only in the direction of arrival.
本発明は入力正弦信号を２分し、一方を90°移
相器、他方を全波整流回路を介した上、両出力信
号を加算し、さらに半波整流することによつて、
入力信号の０度点をピーク値に変換する信号処理
装置である。
The present invention divides the input sine signal into two, passes one through a 90° phase shifter and the other through a full-wave rectifier circuit, adds both output signals, and further performs half-wave rectification.
This is a signal processing device that converts the 0 degree point of an input signal into a peak value.
以下図面を参照して本発明の実施例を詳細に説
明する。
Embodiments of the present invention will be described in detail below with reference to the drawings.
第２図は本発明の一実施例で、アンテナ走査器
１１のドプラ効果によつて得られたFM信号は、
受信機１２、リミツタ１３を介し、FM復調器１
４によつてFM信号が復調される。この復調信号
はBPF１５により、高周波が除去された第４図
ａに示すような信号S11となる。この信号S11は
アンテナ走査に同期した正弦信号であり、例えば
からに変化するゼロクロス点が電波の到来方
位を表わす。この復調信号は２分され、90°（又は
−90°）移相器１６、および全波整流回路１７に
供給される。90°移相器１６に於いては、入力正
弦信号の90°移相が行われ第４図ｃに示すような
信号S13が得られる。また、全波整流回路１７に
於いては、入力正弦信号がゼロクロス点で負に折
返され第４図ｂに示すような両波整流信号S12が
得られる。前記信号S13は、AGC（自動利得制御
回路）１８により受信周波数に比例して生ずるレ
ベルを変動がおさえられ、両波整流信号S12と共
に加算器１９により加算され第４図ｄに示すよう
な加算信号S14を得る。この加算信号S14は、さ
らに半波整流回路２０により、負成分を除去すれ
ば第４図ｅに示すように電波の到来方向に対して
のみ尖鋭なピーク波形信号S15を得ることができ
る。このピーク信号S15は、後段の乗算器２１に
加えられ、かつこの乗算器２１によりアンテナ走
査に同期した正弦・余弦信号S16と乗算されるこ
とにより、指示器２２上に、所要の単一ピーク表
示波形を表示することができる。 FIG. 2 shows an embodiment of the present invention, in which the FM signal obtained by the Doppler effect of the antenna scanner 11 is
FM demodulator 1 via receiver 12 and limiter 13
4 demodulates the FM signal. This demodulated signal is turned into a signal S11 as shown in FIG. 4a, with high frequencies removed by the BPF 15. This signal S11 is a sine signal synchronized with antenna scanning, and a zero-crossing point that changes from time to time represents the arrival direction of the radio wave, for example. This demodulated signal is divided into two parts and supplied to a 90° (or -90°) phase shifter 16 and a full-wave rectifier circuit 17. In the 90° phase shifter 16, the input sine signal is phase-shifted by 90° to obtain a signal S13 as shown in FIG. 4c. Further, in the full-wave rectifier circuit 17, the input sine signal is turned negative at the zero-crossing point to obtain a double-wave rectified signal S12 as shown in FIG. 4b. The signal S13 is subjected to an AGC (automatic gain control circuit) 18 to suppress fluctuations in the level that occurs in proportion to the receiving frequency, and is added together with the double-wave rectified signal S12 by an adder 19 to produce an added signal as shown in FIG. 4d. Get S14. If the negative component of this addition signal S14 is further removed by a half-wave rectifier circuit 20, a peak waveform signal S15 that is sharp only in the direction of arrival of the radio waves can be obtained as shown in FIG. 4e. This peak signal S15 is added to the multiplier 21 at the subsequent stage, and is multiplied by the sine/cosine signal S16 synchronized with the antenna scanning by this multiplier 21, so that the desired single peak is displayed on the indicator 22. Waveforms can be displayed.
以上述べたように本発明によれば、指示器表示
波形は、尖鋭な単一ピーク表示波形となるため、
センス決定に伴う操作が不要となるばかりか、電
波伝播上のゆらぎを含め、自然な波形表示を可能
とすることができるため、操作上の時間的節約と
共に、効率的な運用を図ることができる。
As described above, according to the present invention, the indicator display waveform becomes a sharp single peak display waveform.
Not only does it eliminate the need for operations associated with sense determination, but it also allows for natural waveform display, including fluctuations in radio wave propagation, which saves operational time and enables efficient operation. .
第１図は従来の方探信号処理装置を示す構成説
明図、第２図は本発明の一実施例を示す構成説明
図、第３図は第１図装置の各部信号波形図、第４
図は第２図装置の各部信号波形の一例を示す図で
ある。
１１……アンテナ走査器、１２……受信機、１
３……リミツタ、１４……FM復調器、１５……
BPF、１６……90°移相器、１７……全波整流回
路、１８……AGC、１９……加算器、２０……
半波整流回路、２１……乗算器、２２……指示
器。
FIG. 1 is a configuration explanatory diagram showing a conventional direction finding signal processing device, FIG. 2 is a configuration explanatory diagram showing an embodiment of the present invention, FIG. 3 is a signal waveform diagram of each part of the device shown in FIG.
The figure is a diagram showing an example of signal waveforms at various parts of the apparatus shown in FIG. 11...Antenna scanner, 12...Receiver, 1
3... Limiter, 14... FM demodulator, 15...
BPF, 16... 90° phase shifter, 17... Full wave rectifier circuit, 18... AGC, 19... Adder, 20...
Half-wave rectifier circuit, 21...multiplier, 22...indicator.
Claims (1)
と、この受信手段の出力信号が供給され、ゼロク
ロス点が前記電波の到来方位に対応した正弦波信
号を出力する出力手段と、この出力手段の出力信
号が供給され、前記電波の到来方位に対応した方
位信号を抽出する信号処理手段と、この信号処理
手段で抽出された方位信号が供給され、前記電波
の到来方位を指示する指示手段とを具備する信号
処理装置において、 前記信号処理手段は、 前記正弦波信号を全波整流する整流回路と、前
記正弦波信号を90度移相する移相部と、この移相
部の出力信号と前記整流回路の出力信号とを加算
する加算器と、この加算器の出力信号から前記正
弦波信号の０度に対応した方位信号を抽出する抽
出部とで構成されることを特徴とする信号処理装
置。[Scope of Claims] 1. Receiving means for receiving radio waves arriving from the outside; output means to which the output signal of the receiving means is supplied and outputting a sine wave signal whose zero crossing point corresponds to the arrival direction of the radio waves; A signal processing means is supplied with the output signal of the output means and extracts a direction signal corresponding to the direction of arrival of the radio wave, and a direction signal extracted by the signal processing means is supplied to indicate the direction of arrival of the radio wave. In the signal processing device, the signal processing means includes: a rectifier circuit that full-wave rectifies the sine wave signal; a phase shifter that shifts the phase of the sine wave signal by 90 degrees; It is characterized by being comprised of an adder that adds an output signal and an output signal of the rectifier circuit, and an extraction section that extracts an azimuth signal corresponding to 0 degrees of the sine wave signal from the output signal of the adder. signal processing equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58180500A JPS6073381A (en) | 1983-09-30 | 1983-09-30 | Signal processing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58180500A JPS6073381A (en) | 1983-09-30 | 1983-09-30 | Signal processing apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6073381A JPS6073381A (en) | 1985-04-25 |
| JPH0456265B2 true JPH0456265B2 (en) | 1992-09-07 |
Family
ID=16084321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58180500A Granted JPS6073381A (en) | 1983-09-30 | 1983-09-30 | Signal processing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6073381A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6256193B2 (en) * | 2014-05-26 | 2018-01-10 | 株式会社デンソーウェーブ | Radio wave arrival direction estimation device and radio wave arrival direction estimation system |
| JP6303862B2 (en) * | 2014-06-25 | 2018-04-04 | 株式会社デンソーウェーブ | Radio wave arrival direction estimation device, radio wave arrival direction estimation system |
-
1983
- 1983-09-30 JP JP58180500A patent/JPS6073381A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6073381A (en) | 1985-04-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |