JPS5685961A - Phase modulator - Google Patents

Phase modulator

Info

Publication number
JPS5685961A
JPS5685961A JP16330779A JP16330779A JPS5685961A JP S5685961 A JPS5685961 A JP S5685961A JP 16330779 A JP16330779 A JP 16330779A JP 16330779 A JP16330779 A JP 16330779A JP S5685961 A JPS5685961 A JP S5685961A
Authority
JP
Japan
Prior art keywords
kpm
phi
terminal
modulated wave
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.)
Pending
Application number
JP16330779A
Other languages
Japanese (ja)
Inventor
Katsumi Kobayashi
Noboru Kan
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP16330779A priority Critical patent/JPS5685961A/en
Publication of JPS5685961A publication Critical patent/JPS5685961A/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
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H04L27/2032—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner
    • H04L27/2035—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using a single or unspecified number of carriers

Abstract

PURPOSE:To reduce the power consumption of the modulator and make it small- sized, by reading out the cos value and the sin value at every period of the modulated wave, in the phase modulator for obtaining the sampled phase modulated wave by means of digital processing. CONSTITUTION:The sampling value m(lT') of a modulated wave is input to the multiplier 17 from the terminal 15, it is multiplied by a constant kp of the terminal 16, and outputs kpm(lT'). This output is added to phi'(lT') from the terminal 22, and phi'(lT')+kpm(lT') is output. This value is input to the cos arithmetic circuit 23 and the sin arithmetic circuit 24, and cos [phi'(lT')+kpm(l'T')] and sin [phi' (lT')+kpm(l'T')] are output, respectively. These two values are reciprocally selected at every T by the selective circuit 25, are inverted at every 2T by the code inverting circuit 26, and a phase modulated wave can be obtained from the terminal 19.
JP16330779A 1979-12-14 1979-12-14 Phase modulator Pending JPS5685961A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16330779A JPS5685961A (en) 1979-12-14 1979-12-14 Phase modulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16330779A JPS5685961A (en) 1979-12-14 1979-12-14 Phase modulator

Publications (1)

Publication Number Publication Date
JPS5685961A true JPS5685961A (en) 1981-07-13

Family

ID=15771333

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16330779A Pending JPS5685961A (en) 1979-12-14 1979-12-14 Phase modulator

Country Status (1)

Country Link
JP (1) JPS5685961A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5881364A (en) * 1981-11-11 1983-05-16 Yokogawa Hewlett Packard Ltd Digital phase area amplitude modulator
JPS61234153A (en) * 1985-04-10 1986-10-18 Hitachi Ltd Digital modulator

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5324763A (en) * 1976-08-20 1978-03-07 Oki Electric Ind Co Ltd Data transmission system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5324763A (en) * 1976-08-20 1978-03-07 Oki Electric Ind Co Ltd Data transmission system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5881364A (en) * 1981-11-11 1983-05-16 Yokogawa Hewlett Packard Ltd Digital phase area amplitude modulator
JPH0435922B2 (en) * 1981-11-11 1992-06-12 Yokogawa Hyuuretsuto Patsukaado Kk
JPS61234153A (en) * 1985-04-10 1986-10-18 Hitachi Ltd Digital modulator

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