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JPS57129042A - Modulator and demodulator for spectrum spread loop multiplex transmission - Google Patents

Modulator and demodulator for spectrum spread loop multiplex transmission

Info

Publication number
JPS57129042A
JPS57129042A JP56014885A JP1488581A JPS57129042A JP S57129042 A JPS57129042 A JP S57129042A JP 56014885 A JP56014885 A JP 56014885A JP 1488581 A JP1488581 A JP 1488581A JP S57129042 A JPS57129042 A JP S57129042A
Authority
JP
Japan
Prior art keywords
multiplier
transmission line
spectrum spread
selector
multiplied
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
JP56014885A
Other languages
Japanese (ja)
Other versions
JPS6336695B2 (en
Inventor
Satoshi Hasegawa
Botaro Hirosaki
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 JP56014885A priority Critical patent/JPS57129042A/en
Priority to US06/264,163 priority patent/US4392220A/en
Priority to AU71156/81A priority patent/AU537148B2/en
Priority to CA000378694A priority patent/CA1165476A/en
Priority to EP81104133A priority patent/EP0041253B1/en
Priority to DE8181104133T priority patent/DE3172013D1/en
Publication of JPS57129042A publication Critical patent/JPS57129042A/en
Publication of JPS6336695B2 publication Critical patent/JPS6336695B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/10—Code generation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/0022—PN, e.g. Kronecker
    • H04J13/0025—M-sequences

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)

Abstract

PURPOSE:To make a transmitting and receiving terminal small insize, by using in common an M sequence generator, a multiplier and a low pass filter, for various service functions by use of a selector. CONSTITUTION:A spectrum spread signal from a transmission line 350 is multiplied by an output of an M sequence generator 301 by a multiplier 302, this multiplied output is inputted to a low pass filter 312, and a data component is extracted. A high pass filter 303 removes a data component from an output of the multiplier 302, and sends it out again to the transmission line 350 through an adder 306. In case of a multiple address communication receiving mode and a monitoring mode, the spectrum spread signal of the transmission line 350 is added to a multiplier 308 by a selector 309, is multiplied by an M sequence signal, and a result of multiplication is added to the adder 306 through a selector 307 and is sent out to the transmission line 350.
JP56014885A 1980-05-30 1981-02-03 Modulator and demodulator for spectrum spread loop multiplex transmission Granted JPS57129042A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP56014885A JPS57129042A (en) 1981-02-03 1981-02-03 Modulator and demodulator for spectrum spread loop multiplex transmission
US06/264,163 US4392220A (en) 1980-05-30 1981-05-15 Modem to be coupled to a directional transmission line of an SS multiplex communication network
AU71156/81A AU537148B2 (en) 1980-05-30 1981-05-29 Code division multiplex transmission
CA000378694A CA1165476A (en) 1980-05-30 1981-05-29 Modem to be coupled to a directional transmission line of an ss multiplex communication network
EP81104133A EP0041253B1 (en) 1980-05-30 1981-05-29 Transmitter-receiver to be coupled to a directional transmission line of a spread-spectrum multiplex communication network
DE8181104133T DE3172013D1 (en) 1980-05-30 1981-05-29 Transmitter-receiver to be coupled to a directional transmission line of a spread-spectrum multiplex communication network

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56014885A JPS57129042A (en) 1981-02-03 1981-02-03 Modulator and demodulator for spectrum spread loop multiplex transmission

Publications (2)

Publication Number Publication Date
JPS57129042A true JPS57129042A (en) 1982-08-10
JPS6336695B2 JPS6336695B2 (en) 1988-07-21

Family

ID=11873463

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56014885A Granted JPS57129042A (en) 1980-05-30 1981-02-03 Modulator and demodulator for spectrum spread loop multiplex transmission

Country Status (1)

Country Link
JP (1) JPS57129042A (en)

Also Published As

Publication number Publication date
JPS6336695B2 (en) 1988-07-21

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