JPH0216632U - - Google Patents
Info
- Publication number
- JPH0216632U JPH0216632U JP1988095588U JP9558888U JPH0216632U JP H0216632 U JPH0216632 U JP H0216632U JP 1988095588 U JP1988095588 U JP 1988095588U JP 9558888 U JP9558888 U JP 9558888U JP H0216632 U JPH0216632 U JP H0216632U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- frequency
- output
- voltage
- detection circuit
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 1
Landscapes
- Transceivers (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Noise Elimination (AREA)
- Mobile Radio Communication Systems (AREA)
Description
第１図は本考案の同一チヤンネル干渉波検出回
路の一実施例回路図、第２図は本考案回路を構成
する包絡線二乗検波回路の出力端における干渉に
基く発生スペクトラムの周波数分析結果を示す図
で、Ａ図及びＢ図は夫々希望波（正規の信号）及
び干渉波に変調信号がある場合の周波数―振幅特
性図である。
１……同一チヤンネル干渉波検出回路、２……
高周波受信回路、３……包絡線二乗検波回路、４
……ＨＰＦ（高域波器）、５……周波数イコラ
イジング回路、６……整流回路、７……レベル比
較回路、８……出力端子、Ａ……アンテナ。
Fig. 1 is a circuit diagram of an embodiment of the same channel interference wave detection circuit of the present invention, and Fig. 2 shows the result of frequency analysis of the generated spectrum based on interference at the output end of the envelope square law detection circuit that constitutes the circuit of the present invention. In the figure, Figures A and B are frequency-amplitude characteristic diagrams when there is a modulation signal in the desired wave (regular signal) and interference wave, respectively. 1... Same channel interference wave detection circuit, 2...
High frequency receiving circuit, 3... Envelope square law detection circuit, 4
... HPF (high frequency filter), 5 ... frequency equalizing circuit, 6 ... rectifier circuit, 7 ... level comparison circuit, 8 ... output terminal, A ... antenna.
Claims (1)
する高周波受信回路と、該高周波受信回路の出力
を検波する包絡線二乗検波回路と、該包絡線二乗
検波回路の出力信号のうち３〜４ＫＨｚ以下の周
波数成分を除去するための高域波器と、該高域
波器の出力を所定の特性に等価化する周波数イ
コライジング回路と、該周波数イコライジング回
路の出力を整流する整流回路と、該整流回路の出
力を所定のＤＵ比（希望波と干渉波の振幅比）に
相当する直流電圧とレベル比較して該直流電圧を
整流回路の出力電圧が越えた際に検出信号を出力
するレベル比較回路とを備えて構成したことを特
徴とする同一チヤンネル干渉波検出回路。 A high frequency receiving circuit that amplifies and frequency converts the radio waves received by the antenna, an envelope square law detection circuit that detects the output of the high frequency reception circuit, and a frequency of 3 to 4 KHz or less among the output signals of the envelope square law detection circuit. A high-frequency wave generator for removing components, a frequency equalizing circuit that equalizes the output of the high-frequency wave generator to predetermined characteristics, a rectifier circuit that rectifies the output of the frequency equalizing circuit, and an output of the rectifier circuit. and a level comparison circuit that compares the level of the DC voltage with a DC voltage corresponding to a predetermined DU ratio (amplitude ratio of desired wave and interference wave) and outputs a detection signal when the output voltage of the rectifier circuit exceeds the DC voltage. A same channel interference wave detection circuit characterized in that the same channel interference wave detection circuit is configured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988095588U JPH0216632U (en) | 1988-07-19 | 1988-07-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988095588U JPH0216632U (en) | 1988-07-19 | 1988-07-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0216632U true JPH0216632U (en) | 1990-02-02 |
Family
ID=31320270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988095588U Pending JPH0216632U (en) | 1988-07-19 | 1988-07-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0216632U (en) |
-
1988
- 1988-07-19 JP JP1988095588U patent/JPH0216632U/ja active Pending
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