JPS5590165A - Data transmission system - Google Patents

Data transmission system

Info

Publication number
JPS5590165A
JPS5590165A JP16576478A JP16576478A JPS5590165A JP S5590165 A JPS5590165 A JP S5590165A JP 16576478 A JP16576478 A JP 16576478A JP 16576478 A JP16576478 A JP 16576478A JP S5590165 A JPS5590165 A JP S5590165A
Authority
JP
Japan
Prior art keywords
transmission
reception
thetait
circuit
reception side
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
Application number
JP16576478A
Other languages
Japanese (ja)
Inventor
Koichi Honma
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP16576478A priority Critical patent/JPS5590165A/en
Publication of JPS5590165A publication Critical patent/JPS5590165A/en
Pending 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
    • H04L27/18—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
    • H04L27/2334—Demodulator circuits; Receiver circuits using non-coherent demodulation using filters

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 attain narrow-band and constant-amplitude efficient transmission by performing Nyquist waveform transmission by providing PLL circuits to transmission and reception parts and a bit integrating circuit to the reception side. CONSTITUTION:On a transmission side and reception, PLLs are composed of phase detectors 12 and 15, loop filters 13 and 16, and VCOs 14 and 17, and on the reception side, bit integrating circuit 19, etc., are added. In this constitution, transfer characteristic FT(s) of filter 13 are represented by closed-loop transfer function HT(s)=thetaOT/thetaiT denoting constants of detector 12 and VCO14 by KDT and KOT respectively. Here, thetaiT and thetaoT are phase characteristics of respective parts. As to the reception side, HR(s)=thetaoR/thetaiR is obtained similarly. Next, output VI of filter 16 is passed through phase equalizer 18 and circuit 19 to obtain output V2=ETAT(s). HR(s).HE(s).thetaiT/KoR. Here, amplitude characteristics are made to approximate by a rational function to obtain transfer characteristics FT and FR, which are mixed by a circuit, so that the overall characteristics will satisfy the 1st Nyquist postulate.
JP16576478A 1978-12-27 1978-12-27 Data transmission system Pending JPS5590165A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16576478A JPS5590165A (en) 1978-12-27 1978-12-27 Data transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16576478A JPS5590165A (en) 1978-12-27 1978-12-27 Data transmission system

Publications (1)

Publication Number Publication Date
JPS5590165A true JPS5590165A (en) 1980-07-08

Family

ID=15818591

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16576478A Pending JPS5590165A (en) 1978-12-27 1978-12-27 Data transmission system

Country Status (1)

Country Link
JP (1) JPS5590165A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55133163A (en) * 1979-04-03 1980-10-16 Meisei Electric Co Ltd Psk signal transmission circuit
JPS57152258A (en) * 1981-03-13 1982-09-20 Nec Corp Fm modulator
JPS62269446A (en) * 1986-05-09 1987-11-21 ハニ−ウエル　インコ−ポレイテツド Phase transfer keying modulator

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IEEE TRANSACTIONS ON COMMUNICATIONS=1977 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55133163A (en) * 1979-04-03 1980-10-16 Meisei Electric Co Ltd Psk signal transmission circuit
JPS57152258A (en) * 1981-03-13 1982-09-20 Nec Corp Fm modulator
JPS62269446A (en) * 1986-05-09 1987-11-21 ハニ−ウエル　インコ−ポレイテツド Phase transfer keying modulator

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