JPS584860B2 - Signal identification method - Google Patents
Signal identification methodInfo
- Publication number
- JPS584860B2 JPS584860B2 JP52006547A JP654777A JPS584860B2 JP S584860 B2 JPS584860 B2 JP S584860B2 JP 52006547 A JP52006547 A JP 52006547A JP 654777 A JP654777 A JP 654777A JP S584860 B2 JPS584860 B2 JP S584860B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- filter
- output
- circuit
- level
- 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
Links
Landscapes
- Networks Using Active Elements (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Description
【発明の詳細な説明】
本発明は多周波信号の受信装置における信号識別方式に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a signal identification method in a multi-frequency signal receiving device.
信号識別に使用する帯域ろ波器としては阻止域減衰量が
大きくかつろ波器を通過した信号のリツプルが小さいこ
とが必要である。A bandpass filter used for signal identification needs to have a large stopband attenuation and a small ripple in the signal passed through the filter.
従来、この必要条件を満足するために帯域通過Ｆ波器を
零点をもつ低域通過ろ波器と零点をもつ高城通過ろ波器
で構成したため帯域通過ろ波器の回路構成および調整が
複雑となり信号識別装置が高価なものとなる欠点があっ
た。Conventionally, in order to satisfy this requirement, a bandpass F-wave filter was constructed with a low-pass filter with a zero point and a Takagi pass filter with a zero point, which made the circuit configuration and adjustment of the band-pass filter complex. This has the disadvantage that the signal identification device is expensive.
本発明は帯域通過ろ波器の入力レベルと出力レベルを比
較した信号で帯域通過ろ波器を通過した信号を制御する
ことにより帯域通過ろ波器の阻止域減衰量を小さくし、
回路構成および調整の簡単な信号識別方式を提供するこ
とを目的とする。The present invention reduces the stopband attenuation of a bandpass filter by controlling the signal that has passed through the bandpass filter using a signal that compares the input level and output level of the bandpass filter.
The purpose of this invention is to provide a signal identification method with simple circuit configuration and adjustment.
本発明は上記目的を達成するため、複数個の異なる周波
数が混合された信号あるいは１個の信号を沖波器に入力
し、該入力信号に適当な重みづけをしたレベルを基準レ
ベルとし、該基準レベルと前記ろ波器の出力レベルとを
比較した信号で前記ろ波器を通過した信号を制脚するよ
うにしたものである。In order to achieve the above object, the present invention inputs a signal in which a plurality of different frequencies are mixed or a single signal to an Oki wave device, sets the level obtained by appropriately weighting the input signal as a reference level, and sets the level obtained by appropriately weighting the input signal as a reference level. The signal that has passed through the filter is controlled by a signal obtained by comparing the output level of the filter with the output level of the filter.
次に本発明の実施例について図面を参照して説明する。Next, embodiments of the present invention will be described with reference to the drawings.
第１図は本発明の一実施例を示すブロック図であり、Ｂ
ＰＦは被選択信号が通過できる帯域をもつ帯域通過ろ波
器でＧＣは帯域通過ろ波器の入力レベルのＫ倍（帯域通
過ろ波器の利得が零の場合０＜Ｋ＜１）と出力レベルを
比較し、出力レベルの方が大きい場合のみゲート回路Ｇ
を開くゲート制御回路である。FIG. 1 is a block diagram showing one embodiment of the present invention, and B
PF is a bandpass filter with a band through which the selected signal can pass, and GC is K times the input level of the bandpass filter (0<K<1 when the gain of the bandpass filter is 0) and the output. Compare the levels, and only if the output level is higher, gate circuit G
This is a gate control circuit that opens the gate.
ゲート回路Ｇが開くと信号がそのまま出力され、閉じる
と出力は零となる。When the gate circuit G is opened, the signal is output as is, and when it is closed, the output becomes zero.
第２図は第１図のブロック図の入出力特性であり、破線
は帯域通過ろ波器の入出力特性である。FIG. 2 shows the input/output characteristics of the block diagram of FIG. 1, and the broken line shows the input/output characteristics of the bandpass filter.
すなわち帯域外信号が入力されると帯域通過Ｐ波器で減
衰されるため入力レベルのＫ倍より出力レベルが小さく
なり、ゲート制御回路はゲート回路を閉じ、帯域外信号
は出力されない。That is, when an out-of-band signal is input, it is attenuated by the band-pass P-wave device, so the output level becomes smaller than K times the input level, the gate control circuit closes the gate circuit, and the out-of-band signal is not output.
したがって第２図の実線のようにしゃ断特性の良い信号
識別回路が得られる。Therefore, a signal discrimination circuit with good cutoff characteristics as shown by the solid line in FIG. 2 can be obtained.
なお、帯域通過ろ波器ＢＰＦのブロックは低域通過ろ波
器あるいは高城通過ｐ波器であってもしゃ断特性の良い
信号識別回路が得られる。Note that even if the block of the band pass filter BPF is a low pass filter or a Takagi pass p-wave filter, a signal discrimination circuit with good cutoff characteristics can be obtained.
また、ゲート回路Ｇを信号検出用閾値を持つ信号弁別回
路に置き換え、閾値をゲート制御回路で制御することに
より直流出力を得ることもできる。Furthermore, a direct current output can be obtained by replacing the gate circuit G with a signal discrimination circuit having a signal detection threshold and controlling the threshold with a gate control circuit.
第１図のブロック図の具体回路例を第３図に示す。A specific circuit example of the block diagram in FIG. 1 is shown in FIG. 3.
本発明は以上説明したようにろ波器の入出力レベルを比
較した信号でろ波器の出力を制薗することにより簡単な
構成で信号／雑音比のすぐれた信号識別を可能にし、信
号識別装置の小形化、経済化をも可能にする方式である
。As explained above, the present invention enables signal identification with an excellent signal/noise ratio with a simple configuration by controlling the output of a filter using a signal that compares the input and output levels of the filter. This method also enables miniaturization and economicalization.
第１図は本発明の一実施例を示すブロック図、第２図は
第１図のブロック図の入出力特性図、第３図は第１図の
ブロック図の具体的一回路例を示す回路図である。
ＢＰＦ・・・・・・帯域通過ろ波器、ＧＣ・・・・・・
ゲート制御回路、Ｇ・・・・・・ゲート回路、Ａ０〜Ａ
２・・・・・演算増幅器、Ａ３・・・・・・ゲート付演
算増幅器、ＤＯ，Ｄ１・・・・・・ダイオード、Ｒ１〜
Ｒ３・・・・・・抵抗、Ｃ０，Ｃ１・・・・・・コンデ
ンサ。Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is an input/output characteristic diagram of the block diagram of Fig. 1, and Fig. 3 is a circuit showing a specific example of the circuit of the block diagram of Fig. 1. It is a diagram. BPF...Band pass filter, GC...
Gate control circuit, G...Gate circuit, A0 to A
2...Operation amplifier, A3...Operation amplifier with gate, DO, D1...Diode, R1~
R3...Resistor, C0, C1...Capacitor.
Claims (1)
個の信号を帯域通過Ｐ波器、低域通過Ｐ波器、および高
城通過Ｐ波器のいずれか１つに入力し、該入力信号レベ
ルのＫ倍（０＜Ｋ＜１）を基準レベルとし、該基準レベ
ルと前記沖波器の出力レベルを比較した信号で、前記ろ
波器を通過した信号を制御することを特徴とする信号識
別方式。1 A signal that is a mixture of multiple different frequencies or 1
A signal of . A signal identification method, characterized in that the signal that has passed through the filter is controlled by a signal that compares the reference level with the output level of the Oki wave filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52006547A JPS584860B2 (en) | 1977-01-24 | 1977-01-24 | Signal identification method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52006547A JPS584860B2 (en) | 1977-01-24 | 1977-01-24 | Signal identification method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5391620A JPS5391620A (en) | 1978-08-11 |
| JPS584860B2 true JPS584860B2 (en) | 1983-01-28 |
Family
ID=11641348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP52006547A Expired JPS584860B2 (en) | 1977-01-24 | 1977-01-24 | Signal identification method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS584860B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20210069783A (en) * | 2019-12-03 | 2021-06-14 | 현대자동차주식회사 | Reforming System and Reforming Method Using Off Gas as Refrigerant |
-
1977
- 1977-01-24 JP JP52006547A patent/JPS584860B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20210069783A (en) * | 2019-12-03 | 2021-06-14 | 현대자동차주식회사 | Reforming System and Reforming Method Using Off Gas as Refrigerant |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5391620A (en) | 1978-08-11 |
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