JPS5652953A - Deciding circuit - Google Patents

Deciding circuit

Info

Publication number
JPS5652953A
JPS5652953A JP12827379A JP12827379A JPS5652953A JP S5652953 A JPS5652953 A JP S5652953A JP 12827379 A JP12827379 A JP 12827379A JP 12827379 A JP12827379 A JP 12827379A JP S5652953 A JPS5652953 A JP S5652953A
Authority
JP
Japan
Prior art keywords
area
decision
mapping
decision part
qam signal
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
Application number
JP12827379A
Other languages
Japanese (ja)
Other versions
JPS5854703B2 (en
Inventor
Masakazu Shirakawa
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP54128273A priority Critical patent/JPS5854703B2/en
Publication of JPS5652953A publication Critical patent/JPS5652953A/en
Publication of JPS5854703B2 publication Critical patent/JPS5854703B2/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
    • H04L27/32—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

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 deciding circuit of the multilevel QAM (orthogonal amplitude modulation) which does not require ROM of the large capacity, by combining the mapping circuit part and two kinds of deciding circuit parts. CONSTITUTION:A hexadecimal QAM signal which has been demodulated is provided to the input terminal 41, and is supplied to the first decision part 42 and the mapping part 43, respectively. The first decision part 42 decides to which this hexadecimal QAM signal belongs among the areas 0-7, in accordance with the eight border lines shown in the figure. The mapping part 43 converts the area by operation to one area of the eight areas, concerning the said hexadecimal QAM signal, and the second decision part 44 receives the conversion information and decides a corresponding ideal point by means of operation in accordance with the optimum border line. And the decision result relating to the area by the first decision part 42, and the information of the ideal point in the area 0 by the second decision part 44 are provided to the decoding part 45, and the decided data bit can be received from its output terminal 46.
JP54128273A 1979-10-04 1979-10-04 Judgment circuit Expired JPS5854703B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54128273A JPS5854703B2 (en) 1979-10-04 1979-10-04 Judgment circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54128273A JPS5854703B2 (en) 1979-10-04 1979-10-04 Judgment circuit

Publications (2)

Publication Number Publication Date
JPS5652953A true JPS5652953A (en) 1981-05-12
JPS5854703B2 JPS5854703B2 (en) 1983-12-06

Family

ID=14980746

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54128273A Expired JPS5854703B2 (en) 1979-10-04 1979-10-04 Judgment circuit

Country Status (1)

Country Link
JP (1) JPS5854703B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57209995A (en) * 1981-06-18 1982-12-23 Sumitomo Chem Co Ltd Improvement of low-temperature fluidity of fuel oil
JPS58179292A (en) * 1982-04-13 1983-10-20 Nippon Synthetic Chem Ind Co Ltd:The Stabilization of liquid hydrocarbon-based mixture
JPS59136391A (en) * 1983-01-04 1984-08-04 エクソン・リサ−チ・アンドエンヂニアリング・コムパニ− Improved low temperature fluid intermediate distillate composition
JPH01188144A (en) * 1988-01-22 1989-07-27 Canon Inc Data deciding method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6210702A (en) * 1985-07-08 1987-01-19 Chino Corp Program controller

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57209995A (en) * 1981-06-18 1982-12-23 Sumitomo Chem Co Ltd Improvement of low-temperature fluidity of fuel oil
JPS6033154B2 (en) * 1981-06-18 1985-08-01 住友化学工業株式会社 Method for improving low temperature fluidity of fuel oil
JPS58179292A (en) * 1982-04-13 1983-10-20 Nippon Synthetic Chem Ind Co Ltd:The Stabilization of liquid hydrocarbon-based mixture
JPH0420036B2 (en) * 1982-04-13 1992-03-31 Nippon Synthetic Chem Ind
JPS59136391A (en) * 1983-01-04 1984-08-04 エクソン・リサ−チ・アンドエンヂニアリング・コムパニ− Improved low temperature fluid intermediate distillate composition
JPH0330637B2 (en) * 1983-01-04 1991-05-01 Exxon Research Engineering Co
JPH01188144A (en) * 1988-01-22 1989-07-27 Canon Inc Data deciding method

Also Published As

Publication number Publication date
JPS5854703B2 (en) 1983-12-06

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