JPS57103449A - Modulating circuit for tdma - Google Patents

Modulating circuit for tdma

Info

Publication number
JPS57103449A
JPS57103449A JP17856580A JP17856580A JPS57103449A JP S57103449 A JPS57103449 A JP S57103449A JP 17856580 A JP17856580 A JP 17856580A JP 17856580 A JP17856580 A JP 17856580A JP S57103449 A JPS57103449 A JP S57103449A
Authority
JP
Japan
Prior art keywords
pulse
modulation
modulator
same polarity
polarity
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
JP17856580A
Other languages
Japanese (ja)
Other versions
JPS6242545B2 (en
Inventor
Noriyoshi Ikeda
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 JP17856580A priority Critical patent/JPS57103449A/en
Publication of JPS57103449A publication Critical patent/JPS57103449A/en
Publication of JPS6242545B2 publication Critical patent/JPS6242545B2/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
    • H04L27/18—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

PURPOSE:To simplify the circuit constitution of the transmitting part, by generating two modulation pulses of the same polarity and the opposite polarity depending upon the presence and the absence of the input of a burst switching pulse and by inputting these modulation pulses to a reflex two-phase modulator. CONSTITUTION:When a burst switching pulse inputted to a modulating circuit 9 consists of a two-phase modultor 4 and an exclusive OR gate 5 is 0, a modulation pulse B of the same polarity as a main signal pulse A is outputted from the gate 5. When the burst switching pulse is 1, the modulation pulse B of a polarity opposite to that of the main signal pulse A is outputted. Modulation pulses A and B are inputted as a bias to a reflex two-phase modulator 4 consisting of modulating diodes 7 and 8 and a hybrid 6 to modulates a carrier wave from an oscillation source 1 of the transmission station. The modulator 4 outputs waves with phases modulated at 0 deg. and 180 deg. when modulation pulses A and B have the same polarity, and the modulator 4 functions as an output break switch to return the modulated wave to the input when they have polarities opposite to each other.
JP17856580A 1980-12-17 1980-12-17 Modulating circuit for tdma Granted JPS57103449A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17856580A JPS57103449A (en) 1980-12-17 1980-12-17 Modulating circuit for tdma

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17856580A JPS57103449A (en) 1980-12-17 1980-12-17 Modulating circuit for tdma

Publications (2)

Publication Number Publication Date
JPS57103449A true JPS57103449A (en) 1982-06-28
JPS6242545B2 JPS6242545B2 (en) 1987-09-09

Family

ID=16050699

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17856580A Granted JPS57103449A (en) 1980-12-17 1980-12-17 Modulating circuit for tdma

Country Status (1)

Country Link
JP (1) JPS57103449A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05193377A (en) * 1992-03-19 1993-08-03 Yanmar Diesel Engine Co Ltd Excavating machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05193377A (en) * 1992-03-19 1993-08-03 Yanmar Diesel Engine Co Ltd Excavating machine

Also Published As

Publication number Publication date
JPS6242545B2 (en) 1987-09-09

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