GB1324189A - Data demodulator employing comparison - Google Patents

Data demodulator employing comparison

Info

Publication number
GB1324189A
GB1324189A GB4303770A GB4303770A GB1324189A GB 1324189 A GB1324189 A GB 1324189A GB 4303770 A GB4303770 A GB 4303770A GB 4303770 A GB4303770 A GB 4303770A GB 1324189 A GB1324189 A GB 1324189A
Authority
GB
United Kingdom
Prior art keywords
signals
mark
counter
signal
space
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
GB4303770A
Other languages
English (en)
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.)
Lockheed Martin Corp
Original Assignee
Sanders Associates 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 Sanders Associates Inc filed Critical Sanders Associates Inc
Publication of GB1324189A publication Critical patent/GB1324189A/en
Expired legal-status Critical Current

Links

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
    • H04L27/14—Demodulator circuits; Receiver circuits
    • H04L27/156—Demodulator circuits; Receiver circuits with demodulation using temporal properties of the received signal, e.g. detecting pulse width
    • H04L27/1563—Demodulator circuits; Receiver circuits with demodulation using temporal properties of the received signal, e.g. detecting pulse width using transition or level detection
    • 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
    • H04L27/14—Demodulator circuits; Receiver circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
GB4303770A 1969-09-17 1970-09-08 Data demodulator employing comparison Expired GB1324189A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US85862769A 1969-09-17 1969-09-17

Publications (1)

Publication Number Publication Date
GB1324189A true GB1324189A (en) 1973-07-18

Family

ID=25328758

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4303770A Expired GB1324189A (en) 1969-09-17 1970-09-08 Data demodulator employing comparison

Country Status (11)

Country Link
US (1) US3656064A (https=)
JP (1) JPS4819496B1 (https=)
BE (1) BE756261A (https=)
CA (1) CA926476A (https=)
CH (1) CH534461A (https=)
DE (1) DE2045794A1 (https=)
FR (1) FR2065695B1 (https=)
GB (1) GB1324189A (https=)
IL (1) IL35235A (https=)
NL (1) NL7013568A (https=)
SE (1) SE364154B (https=)

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3916324A (en) * 1971-07-01 1975-10-28 Sanders Associates Inc Method and apparatus for producing a baud timing signal from a modulated carrier signal
US3729684A (en) * 1971-07-01 1973-04-24 Sanders Associates Inc Data demodulator employing multiple correlations and filters
FR2164544B1 (https=) * 1971-12-21 1974-09-27 Ibm France
US3778727A (en) * 1972-05-11 1973-12-11 Singer Co Crystal controlled frequency discriminator
FR2144400A5 (https=) * 1972-06-30 1973-02-09 Schlumberger Compteurs
US3810161A (en) * 1973-03-15 1974-05-07 Westinghouse Electric Corp Apparatus for receiving a frequency and phase coded vehicle control signal
US3814918A (en) * 1973-06-28 1974-06-04 Motorola Inc Digital filter for a digital demodulation receiver
USRE29257E (en) * 1973-06-28 1977-06-07 Motorola, Inc. Digital filter for a digital demodulation receiver
US3879665A (en) * 1973-06-28 1975-04-22 Motorola Inc Digital frequency-shift keying receiver
DE2354718C3 (de) * 1973-11-02 1981-12-17 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Demodulationsverfahren für phasenumgetastete Schwingungen und Schaltungsanordnung zur Durchführung des Verfahrens
US3938052A (en) * 1974-05-09 1976-02-10 Teletype Corporation Digital demodulator for phase-modulated waveforms
US3979685A (en) * 1974-09-16 1976-09-07 Hycom Incorporated Frequency shift key demodulator
US4007330A (en) * 1975-08-13 1977-02-08 Bunker Ramo Corporation Method and apparatus for demodulation of relative phase modulated binary data
US4007331A (en) * 1975-08-13 1977-02-08 Bunker Ramo Corporation Apparatus for demodulation of relative phase modulated binary data
US4064361A (en) * 1975-12-31 1977-12-20 Bell Telephone Laboratories, Incorporated Correlative timing recovery in digital data transmission systems
DE2834689A1 (de) * 1978-08-08 1980-02-14 Licentia Gmbh Digitaler zweitondemodulator
FR2485294A1 (fr) 1980-06-23 1981-12-24 Trt Telecom Radio Electr Demodulateur de frequence utilisant un circuit a retard variable avec la frequence recue
US4368434A (en) * 1980-09-18 1983-01-11 Codex Corporation Programmable digital detector for the demodulation of angle modulated electrical signals
US4458206A (en) * 1981-12-21 1984-07-03 Motorola, Inc. Circuit for synchronizing the demodulation of phase modulated transmission bursts
JPS5923945A (ja) * 1982-07-30 1984-02-07 Toshiba Corp 無線回線信号の検出方式
DE3228969A1 (de) * 1982-08-03 1984-02-09 Siemens AG, 1000 Berlin und 8000 München Verfahren und vorrichtung zur empfangsseitigen rueckgewinnung eines taktsignals
JPS5930217A (ja) * 1982-08-06 1984-02-17 インタ−ナシヨナル　ビジネス　マシ−ンズ　コ−ポレ−シヨン 誤り検出機能を有する復調器
US4532639A (en) * 1983-09-19 1985-07-30 Sperry Corporation CFAR receiver apparatus for detecting a signal in noise
US5185679A (en) * 1988-05-12 1993-02-09 Mitsubishi Denki Kabushiki Kaisha Inversion phenomenon preventing circuit
US5208839A (en) * 1991-05-28 1993-05-04 General Electric Company Symbol synchronizer for sampled signals
US5521938A (en) * 1994-07-01 1996-05-28 Motorola, Inc. Apparatus for performing frequency conversion in a communication system
KR0157711B1 (ko) * 1995-07-12 1998-11-16 김광호 데이타 통신단말장치에서 등화방법
US6064705A (en) * 1997-08-20 2000-05-16 Sarnoff Corporation Manchester encoding and decoding system
US6144253A (en) * 1997-10-27 2000-11-07 Elsag International N.V. Digital FSK demodulator
US7123652B1 (en) * 1999-02-24 2006-10-17 Thomson Licensing S.A. Sampled data digital filtering system
RU2168868C1 (ru) * 2000-01-06 2001-06-10 Омский научно-исследовательский институт приборостроения Устройство для приема телеграфных сигналов
US6891905B1 (en) 2001-08-23 2005-05-10 National Semiconductor Corporation Apparatus and method for FSK demodulation with integrated time and frequency tracking
US20070053466A1 (en) * 2005-09-08 2007-03-08 Klostermann Daniel J Frequency shift keying demodulation technique
RU2476436C1 (ru) * 2012-01-25 2013-02-27 Общество С Ограниченной Ответственностью "Вдс Фарма" Комплексные соединения германия с аминокислотами и карбоновыми кислотами

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3013211A (en) * 1959-11-20 1961-12-12 Collins Radio Co Counter type phase-pulse detector
US3092736A (en) * 1960-03-30 1963-06-04 Lignes Telegraph Telephon Plural signal frequency detector able to continuously distinguish whether frequency difference is positive or negative
US3392337A (en) * 1965-02-09 1968-07-09 Continental Electronics Mfg Wide band frequency discriminator employing a constant delay
US3387220A (en) * 1965-02-23 1968-06-04 Automatic Elect Lab Apparatus and method for synchronously demodulating frequency modulated differentially coherent duobinary signals
US3571712A (en) * 1969-07-30 1971-03-23 Ibm Digital fsk/psk detector

Also Published As

Publication number Publication date
JPS4819496B1 (https=) 1973-06-14
NL7013568A (https=) 1971-03-19
US3656064A (en) 1972-04-11
DE2045794A1 (de) 1971-06-09
CH534461A (it) 1973-02-28
FR2065695B1 (https=) 1974-05-24
CA926476A (en) 1973-05-15
IL35235A0 (en) 1970-11-30
FR2065695A1 (https=) 1971-08-06
BE756261A (fr) 1971-03-01
IL35235A (en) 1973-03-30
SE364154B (https=) 1974-02-11

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees