JPS57154962A - Digital multiphase and multivalue modulator - Google Patents

Digital multiphase and multivalue modulator

Info

Publication number
JPS57154962A
JPS57154962A JP56040025A JP4002581A JPS57154962A JP S57154962 A JPS57154962 A JP S57154962A JP 56040025 A JP56040025 A JP 56040025A JP 4002581 A JP4002581 A JP 4002581A JP S57154962 A JPS57154962 A JP S57154962A
Authority
JP
Japan
Prior art keywords
signal
circuit
base band
multivalue
modulator
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
JP56040025A
Other languages
English (en)
Inventor
Hikari Abe
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
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP56040025A priority Critical patent/JPS57154962A/ja
Publication of JPS57154962A publication Critical patent/JPS57154962A/ja
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
    • H04L27/32—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
    • H04L27/36—Modulator circuits; Transmitter circuits
    • H04L27/362—Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated

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)
JP56040025A 1981-03-19 1981-03-19 Digital multiphase and multivalue modulator Pending JPS57154962A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56040025A JPS57154962A (en) 1981-03-19 1981-03-19 Digital multiphase and multivalue modulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56040025A JPS57154962A (en) 1981-03-19 1981-03-19 Digital multiphase and multivalue modulator

Publications (1)

Publication Number Publication Date
JPS57154962A true JPS57154962A (en) 1982-09-24

Family

ID=12569356

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56040025A Pending JPS57154962A (en) 1981-03-19 1981-03-19 Digital multiphase and multivalue modulator

Country Status (1)

Country Link
JP (1) JPS57154962A (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01106614A (ja) * 1987-10-20 1989-04-24 Nec Corp 乗算器

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5443406A (en) * 1977-09-12 1979-04-06 Nippon Telegr & Teleph Corp <Ntt> Nonlinear distortion compensating device for amplitude phase modulated wave

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5443406A (en) * 1977-09-12 1979-04-06 Nippon Telegr & Teleph Corp <Ntt> Nonlinear distortion compensating device for amplitude phase modulated wave

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01106614A (ja) * 1987-10-20 1989-04-24 Nec Corp 乗算器

Similar Documents

Publication Publication Date Title
TW327262B (en) Wideband vector modulator
KR890006069A (ko) 이중 브랜치 수신기
RU2119240C1 (ru) Способ и устройство восстановления частнотно-модулированного сигнала
JPS57154962A (en) Digital multiphase and multivalue modulator
JPS6471366A (en) Coherent digital signal blanking, bi-phase modulation and frequency doubler circuit and methodology
US7212577B2 (en) Information transfer methods
GB1346608A (en) Dual single sideband transmission system
JPS5637755A (en) Multiphase modulating device
SU1363503A1 (ru) Устройство дл передачи и приема широкополосного звукового сигнала
JPS5660149A (en) Transmitter for multiphase multilevel modulated signal accompanying amplitude modulation
GB1514557A (en) Colour television signal converter and process of conversion
JPS5698941A (en) Ssb power generating system
JPS5574253A (en) Phase modulator
SU801296A1 (ru) Устройство дл передачи дискретнойиНфОРМАции
JPS55117354A (en) Diversity transmission system
SU1003369A1 (ru) Передающа система с угловой модул цией дл вещани
JPS57125537A (en) Space diversity receiver
JPS54146914A (en) Diversity receiving system
JPS5583306A (en) Phase modulator
SU457997A1 (ru) Способ функционального преобразовани аналогового сигнала
JPS567553A (en) Digital type fm modulator
JPH0234539B2 (ja) Deijitarushorigatachotsukohenchosochi
JPS5555629A (en) Noise compensation system in audio signal intermittent transmission
JPS55166333A (en) Digital phase modulator
JPS5513504A (en) Phase modulation system