JPS5455357A - Detection circuit for pilot signal - Google Patents
Detection circuit for pilot signalInfo
- Publication number
- JPS5455357A JPS5455357A JP12270277A JP12270277A JPS5455357A JP S5455357 A JPS5455357 A JP S5455357A JP 12270277 A JP12270277 A JP 12270277A JP 12270277 A JP12270277 A JP 12270277A JP S5455357 A JPS5455357 A JP S5455357A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- pilot signal
- base band
- output
- 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
Landscapes
- Circuits Of Receivers In General (AREA)
Abstract
PURPOSE: To obtain an output signal proportional to only the level of a pilot signal by removing beat components basing upon a base band signal from a detection output through a low-pass filter and by full-wave-rectifying and mixing them.
CONSTITUTION: An input signal of pilot signal f'p and base band signal fBB is converted into two mutually 180°-out-of-phase signals, which are phase-detected 23 respectively with local oscillation signal fp equal in frequency or close to pilot signal (f'p), and both the detection output are full-wave-rectified and mixed after beat component [fBB- (fp±Δfm)]=ΔfBB which bases upon the base band signal is removed through low- pass filter 26. Consequently, an output signal can be obtained which is in proportion to the only level of the pilot signal
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12270277A JPS5455357A (en) | 1977-10-13 | 1977-10-13 | Detection circuit for pilot signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12270277A JPS5455357A (en) | 1977-10-13 | 1977-10-13 | Detection circuit for pilot signal |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5455357A true JPS5455357A (en) | 1979-05-02 |
Family
ID=14842489
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12270277A Pending JPS5455357A (en) | 1977-10-13 | 1977-10-13 | Detection circuit for pilot signal |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5455357A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57124948A (en) * | 1981-01-27 | 1982-08-04 | Nec Corp | Signaling demodulation system |
JP2014165903A (en) * | 2013-02-28 | 2014-09-08 | Japan Radio Co Ltd | Transmitter and receiver |
JP2015023366A (en) * | 2013-07-18 | 2015-02-02 | 日本無線株式会社 | Power estimation device and quality evaluation device |
-
1977
- 1977-10-13 JP JP12270277A patent/JPS5455357A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57124948A (en) * | 1981-01-27 | 1982-08-04 | Nec Corp | Signaling demodulation system |
JP2014165903A (en) * | 2013-02-28 | 2014-09-08 | Japan Radio Co Ltd | Transmitter and receiver |
JP2015023366A (en) * | 2013-07-18 | 2015-02-02 | 日本無線株式会社 | Power estimation device and quality evaluation device |
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