JPS61112458A - 変復調装置 - Google Patents

変復調装置

Info

Publication number
JPS61112458A
JPS61112458A JP59233825A JP23382584A JPS61112458A JP S61112458 A JPS61112458 A JP S61112458A JP 59233825 A JP59233825 A JP 59233825A JP 23382584 A JP23382584 A JP 23382584A JP S61112458 A JPS61112458 A JP S61112458A
Authority
JP
Japan
Prior art keywords
signal
input
output
outputs
value
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
JP59233825A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0234551B2 (enExample
Inventor
Yasutsune Yoshida
泰玄 吉田
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Priority to JP59233825A priority Critical patent/JPS61112458A/ja
Priority to US06/794,662 priority patent/US4750191A/en
Priority to AU49365/85A priority patent/AU588162B2/en
Priority to CA000494589A priority patent/CA1282494C/en
Priority to EP93119447A priority patent/EP0588387B1/en
Priority to BR8505564A priority patent/BR8505564A/pt
Priority to CN85108891A priority patent/CN1007951B/zh
Priority to DE3588002T priority patent/DE3588002T2/de
Priority to EP85114133A priority patent/EP0186757B1/en
Priority to DE3588126T priority patent/DE3588126T2/de
Publication of JPS61112458A publication Critical patent/JPS61112458A/ja
Publication of JPH0234551B2 publication Critical patent/JPH0234551B2/ja
Granted 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
    • H04L27/3405—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power
    • H04L27/3411—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power reducing the peak to average power ratio or the mean power of the constellation; Arrangements for increasing the shape gain of a signal set
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/66—Digital/analogue converters
    • H03M1/664—Non-linear conversion not otherwise provided for in subgroups of H03M1/66

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Theoretical Computer Science (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
JP59233825A 1984-11-06 1984-11-06 変復調装置 Granted JPS61112458A (ja)

Priority Applications (10)

Application Number Priority Date Filing Date Title
JP59233825A JPS61112458A (ja) 1984-11-06 1984-11-06 変復調装置
US06/794,662 US4750191A (en) 1984-11-06 1985-11-04 D/A converter capable of producing an analog signal having levels of a preselected number different from 2N and communication network comprising the D/A converter
AU49365/85A AU588162B2 (en) 1984-11-06 1985-11-05 D/A converter capable of producing an analog signal having levels of a preselected number different from 2N and communication network comprising the D/A converter
CA000494589A CA1282494C (en) 1984-11-06 1985-11-05 D/a converter capable of producing an analog signal having levels of a preselected number different from 2 and communication network comprising the d/a converter
EP93119447A EP0588387B1 (en) 1984-11-06 1985-11-06 D/A converter capable of producing an analog signal having levels of a preselected number different from 2**N and communication network comprising the D/A converter
BR8505564A BR8505564A (pt) 1984-11-06 1985-11-06 Conversor digital-analogico,modulador e demodulador
CN85108891A CN1007951B (zh) 1984-11-06 1985-11-06 能产生预选电平数不等于2n的模拟信号的数模转换器及带有这种转换器的调制器和解调器
DE3588002T DE3588002T2 (de) 1984-11-06 1985-11-06 QAM Modulator und Demodulator.
EP85114133A EP0186757B1 (en) 1984-11-06 1985-11-06 QAM modulator and demodulator
DE3588126T DE3588126T2 (de) 1984-11-06 1985-11-06 D/A-Wandler, fähig zur Erzeugung eines analogen Signals mit vorausgewählter, von 2N verschiedener Pegelzahl, und ein mit einem solchen D/A-Wandler versehenes Kommunikationsnetz

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59233825A JPS61112458A (ja) 1984-11-06 1984-11-06 変復調装置

Publications (2)

Publication Number Publication Date
JPS61112458A true JPS61112458A (ja) 1986-05-30
JPH0234551B2 JPH0234551B2 (enExample) 1990-08-03

Family

ID=16961149

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59233825A Granted JPS61112458A (ja) 1984-11-06 1984-11-06 変復調装置

Country Status (1)

Country Link
JP (1) JPS61112458A (enExample)

Also Published As

Publication number Publication date
JPH0234551B2 (enExample) 1990-08-03

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees