DE3377967D1 - Improved modem signal acquisition technique - Google Patents

Improved modem signal acquisition technique

Info

Publication number
DE3377967D1
DE3377967D1 DE8383305581T DE3377967T DE3377967D1 DE 3377967 D1 DE3377967 D1 DE 3377967D1 DE 8383305581 T DE8383305581 T DE 8383305581T DE 3377967 T DE3377967 T DE 3377967T DE 3377967 D1 DE3377967 D1 DE 3377967D1
Authority
DE
Germany
Prior art keywords
angle
phase
indicated
result
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.)
Expired
Application number
DE8383305581T
Other languages
English (en)
Inventor
Chauncey Stevens Miller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Northrop Grumman Space and Mission Systems Corp
Original Assignee
TRW Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TRW Inc filed Critical TRW Inc
Application granted granted Critical
Publication of DE3377967D1 publication Critical patent/DE3377967D1/de
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/04—Speed or phase control by synchronisation signals
    • H04L7/041—Speed or phase control by synchronisation signals using special codes as synchronising signal
    • H04L7/046—Speed or phase control by synchronisation signals using special codes as synchronising signal using a dotting sequence
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/38—Demodulator circuits; Receiver circuits
    • H04L27/3818—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
DE8383305581T 1983-09-21 1983-09-21 Improved modem signal acquisition technique Expired DE3377967D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP83305581A EP0134860B1 (de) 1983-09-21 1983-09-21 Signal-Zugriffstechnik für einen Modulator-Demodulator

Publications (1)

Publication Number Publication Date
DE3377967D1 true DE3377967D1 (en) 1988-10-13

Family

ID=8191292

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8383305581T Expired DE3377967D1 (en) 1983-09-21 1983-09-21 Improved modem signal acquisition technique

Country Status (2)

Country Link
EP (1) EP0134860B1 (de)
DE (1) DE3377967D1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4686689A (en) * 1986-07-24 1987-08-11 Graham-Patten Systems, Inc. Phase-locked loop circuit
US5230015A (en) * 1989-06-15 1993-07-20 Mitsubishi Denki Kabushiki Kaisha Method and apparatus for static video telephone transmission/receiving
JP2505582B2 (ja) * 1989-06-15 1996-06-12 三菱電機株式会社 静止画テレビ電話装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3971996A (en) * 1973-01-18 1976-07-27 Hycom Incorporated Phase tracking network
US3956623A (en) * 1974-10-21 1976-05-11 Gte Automatic Electric Laboratories Incorporated Digital phase detector
US3962637A (en) * 1974-11-11 1976-06-08 Hycom Incorporated Ultrafast adaptive digital modem
JPS5910621B2 (ja) * 1975-01-08 1984-03-10 日本電気株式会社 デ−タ伝送復調器
US3978407A (en) * 1975-07-23 1976-08-31 Codex Corporation Fast start-up adaptive equalizer communication system using two data transmission rates
CA1157917A (en) * 1978-04-26 1983-11-29 Ran F. Chiu Fast learn digital adaptive equalizer
US4253184A (en) * 1979-11-06 1981-02-24 Bell Telephone Laboratories, Incorporated Phase-jitter compensation using periodic harmonically related components

Also Published As

Publication number Publication date
EP0134860A1 (de) 1985-03-27
EP0134860B1 (de) 1988-09-07

Similar Documents

Publication Publication Date Title
DE3377967D1 (en) Improved modem signal acquisition technique
EP0080157A3 (en) Method and arrangement for demodulating frequency-modulated signals using sampled values
IE39196B1 (en) Automatic frequency corrector for a local oscillator
GB2027315B (en) Circuit for detecting and correcting switching phase errors in colour signals
JPS5378725A (en) Process circuit for color video signal
JPS52114256A (en) Phase synchronization circuit
JPS5423459A (en) Delay detector
JPS5412251A (en) Phase synchronizing circuit
JPS53103362A (en) Digital phase synchronous loop
JPS536518A (en) Detector for time axis variation
JPS5550775A (en) Phase alignment system
JPS5321969A (en) Power-factor measuring circuit for unbalanced three-phase current
ALEINER Use of the maximum likelihood method for the detection of an incompletely known signal
JPS5243468A (en) Method of calculating effective value
JPS5217855A (en) Electromagnetic flowmeter generator
JPS556261A (en) Loran c signal tracer
JPS6424543A (en) Timing synchronizing circuit for modem
JPS52126270A (en) Antiphase detector
JPS5465905A (en) Circuit for detecting loose contact
JPS6362932B2 (de)
JPS524764A (en) Impulse noise removing system of phase synchronizing loop type fm demo dulator
JPS5561109A (en) Oscillator with function of temperature compensation
JPS5370624A (en) Phase synchronous circuit
JPS5513549A (en) Timing phase synchronizing system
JPH0771981A (ja) アナログ検出信号とリファレンス信号間の自動位相補正方法

Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee