JPS57162563A - Delay wave detecting circuit - Google Patents
Delay wave detecting circuitInfo
- Publication number
- JPS57162563A JPS57162563A JP56047907A JP4790781A JPS57162563A JP S57162563 A JPS57162563 A JP S57162563A JP 56047907 A JP56047907 A JP 56047907A JP 4790781 A JP4790781 A JP 4790781A JP S57162563 A JPS57162563 A JP S57162563A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- output
- delay
- detector
- phase
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/22—Demodulator circuits; Receiver circuits
- H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation
- H04L27/2331—Demodulator circuits; Receiver circuits using non-coherent demodulation wherein the received signal is demodulated using one or more delayed versions of itself
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
PURPOSE:To obtain a delay wave detecting circuit being affected with the fluctuation of the input carrier frequency and the fluctuation of the delay degree of a delay circuit, by makig the output of the delay circuit of a delay wave detecting circuit pass through a variable phase circuit which is controlled by the output of a circuit that detects the above-mentioned fluctuations. CONSTITUTION:The input carrier wave signal is branched into three parts by a signal branching circuit 1. The 1st output b1 is led directly to a phase wave detector 2; the 2nd output b2 is led to the detector 2 via a delay circuit 3 and a variable phase shifter 5; and the 3rd output b3 is shifted by pi/d2 phase and then receives the phase wave detection by the output of the shifter 5 and a control signal detector 7. The signal of the detector 7 is switched by a switch circuit 8 and based on the output of the detector 2, and the outut of the detector 2 controls the shifter 5. A series of these loops function to suppress the effect of the carrier frequency and the delay degree of the carrier 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56047907A JPS57162563A (en) | 1981-03-30 | 1981-03-30 | Delay wave detecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56047907A JPS57162563A (en) | 1981-03-30 | 1981-03-30 | Delay wave detecting circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57162563A true JPS57162563A (en) | 1982-10-06 |
| JPS6338142B2 JPS6338142B2 (en) | 1988-07-28 |
Family
ID=12788443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56047907A Granted JPS57162563A (en) | 1981-03-30 | 1981-03-30 | Delay wave detecting circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57162563A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1986000186A1 (en) * | 1984-06-08 | 1986-01-03 | Independent Broadcasting Authority | Circuit for demodulating phase shift keyed signals |
-
1981
- 1981-03-30 JP JP56047907A patent/JPS57162563A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1986000186A1 (en) * | 1984-06-08 | 1986-01-03 | Independent Broadcasting Authority | Circuit for demodulating phase shift keyed signals |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6338142B2 (en) | 1988-07-28 |
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