JPS60176353A - 受信周波数補正方式 - Google Patents
受信周波数補正方式Info
- Publication number
- JPS60176353A JPS60176353A JP3041484A JP3041484A JPS60176353A JP S60176353 A JPS60176353 A JP S60176353A JP 3041484 A JP3041484 A JP 3041484A JP 3041484 A JP3041484 A JP 3041484A JP S60176353 A JPS60176353 A JP S60176353A
- Authority
- JP
- Japan
- Prior art keywords
- output
- lower limits
- range
- discriminator
- operational amplifier
- 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
- 238000000034 method Methods 0.000 claims description 22
- 238000001514 detection method Methods 0.000 claims description 17
- 238000010586 diagram Methods 0.000 description 9
- 230000010355 oscillation Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 241001494908 Akihito Species 0.000 description 1
- 241000963438 Gaussia <copepod> Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000002747 voluntary effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
- H04L27/16—Frequency regulation arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3041484A JPS60176353A (ja) | 1984-02-22 | 1984-02-22 | 受信周波数補正方式 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3041484A JPS60176353A (ja) | 1984-02-22 | 1984-02-22 | 受信周波数補正方式 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS60176353A true JPS60176353A (ja) | 1985-09-10 |
JPH051662B2 JPH051662B2 (enrdf_load_stackoverflow) | 1993-01-08 |
Family
ID=12303285
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3041484A Granted JPS60176353A (ja) | 1984-02-22 | 1984-02-22 | 受信周波数補正方式 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60176353A (enrdf_load_stackoverflow) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03139941A (ja) * | 1989-10-25 | 1991-06-14 | Nec Corp | 周波数変調波受信装置 |
JPH04264851A (ja) * | 1991-02-19 | 1992-09-21 | Tokyo Electric Co Ltd | 受信機の自動周波数制御方法 |
US6226505B1 (en) | 1996-11-20 | 2001-05-01 | Nec Corporation | Automatic frequency correction apparatus and method for radio calling system |
JP2006332878A (ja) * | 2005-05-24 | 2006-12-07 | Japan Radio Co Ltd | 2シンボル区間積分出力の閾値設定装置 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5523674A (en) * | 1978-08-09 | 1980-02-20 | Fujitsu Ten Ltd | Correction circuit for intermediate frequency |
-
1984
- 1984-02-22 JP JP3041484A patent/JPS60176353A/ja active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5523674A (en) * | 1978-08-09 | 1980-02-20 | Fujitsu Ten Ltd | Correction circuit for intermediate frequency |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03139941A (ja) * | 1989-10-25 | 1991-06-14 | Nec Corp | 周波数変調波受信装置 |
JPH04264851A (ja) * | 1991-02-19 | 1992-09-21 | Tokyo Electric Co Ltd | 受信機の自動周波数制御方法 |
US6226505B1 (en) | 1996-11-20 | 2001-05-01 | Nec Corporation | Automatic frequency correction apparatus and method for radio calling system |
JP2006332878A (ja) * | 2005-05-24 | 2006-12-07 | Japan Radio Co Ltd | 2シンボル区間積分出力の閾値設定装置 |
Also Published As
Publication number | Publication date |
---|---|
JPH051662B2 (enrdf_load_stackoverflow) | 1993-01-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP3413060B2 (ja) | 直接変換受信機 | |
US5901347A (en) | Fast automatic gain control circuit and method for zero intermediate frequency receivers and radiotelephone using same | |
JP3744546B2 (ja) | 被サンプリング信号の可変d.c.オフセットを補償する方法および装置 | |
US6195400B1 (en) | Two-mode demodulating apparatus | |
JPH0137055B2 (enrdf_load_stackoverflow) | ||
US6034990A (en) | Digital radio transmission and reception system applying a direct modulation and demodulation method | |
US6240147B1 (en) | Auto frequency control apparatus | |
JPS6239848B2 (enrdf_load_stackoverflow) | ||
US5663989A (en) | Control arrangements for digital radio receivers | |
JPS5831065B2 (ja) | Fsk復調装置 | |
US5444736A (en) | Radio communication apparatus having an automatic frequency control circuit for controlling a transmission frequency on the basis of a reception frequency | |
JPS60176353A (ja) | 受信周波数補正方式 | |
US5949829A (en) | Central error detecting circuit for FSK receiver | |
JPS60153660A (ja) | 周波数ずれ補正方式 | |
US6389089B1 (en) | Method of searching for pilot signals | |
JPH07288551A (ja) | Fsk復調回路 | |
JP2716475B2 (ja) | デジタル遅延検波装置 | |
US6954508B2 (en) | Automatic frequency control system adapted to compensate for an insufficient capture range | |
JPS60119156A (ja) | Msk直交同期検波回路 | |
JP2513329B2 (ja) | 周波数変調波受信装置 | |
US7015749B1 (en) | Frequency discriminator using replica compensated delay lines and method of operation | |
JPH01212932A (ja) | Dpsk変調ヘテロダイン検波方式 | |
JPH0260263A (ja) | 無線機に用いる局部発振器の周波数安定化回路 | |
JPH01164151A (ja) | 符号判定基準電圧生成方式 | |
JPS61156958A (ja) | Gmsk変調器 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term |