JPS5538776A - Multiplied spectrum diffusion modulation system - Google Patents

Multiplied spectrum diffusion modulation system

Info

Publication number
JPS5538776A
JPS5538776A JP11210578A JP11210578A JPS5538776A JP S5538776 A JPS5538776 A JP S5538776A JP 11210578 A JP11210578 A JP 11210578A JP 11210578 A JP11210578 A JP 11210578A JP S5538776 A JPS5538776 A JP S5538776A
Authority
JP
Japan
Prior art keywords
carriers
modulation
channels
given
parts
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
JP11210578A
Other languages
Japanese (ja)
Other versions
JPS581580B2 (en
Inventor
Tatsuro Shomura
Yoshiteru Morihiro
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 JP53112105A priority Critical patent/JPS581580B2/en
Publication of JPS5538776A publication Critical patent/JPS5538776A/en
Publication of JPS581580B2 publication Critical patent/JPS581580B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems

Landscapes

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

Abstract

PURPOSE:To ensure a highly efficient transmission for the information of several channels through one unit of the transmission device by giving the PSK modulation to several carriers of different phases via the spectrum diffusion codes and them compounding these carriers for transmission. CONSTITUTION:The output of carrier generator 16 is branched through branching circuit 25, and the phase is shifted by shifter 26 for one of the carriers. The double- phase PSK modulation is given to each carrier at primary modulation parts 31 and 32 and via the independent information given from input terminals 11 and 12, and furthermore the secondary modulation is given at secondary modulation part 41 and 42 via different codes generated from diffusion code generation parts 51 and 52. These modulated carriers are compounded at compounding circuit 27 to be transmitted through amplifier 28. Thus in case the communication is carried out for independent n channels via one unit of the transmission device, no modification is required at all just by preparing the primary and secondary modulation parts in the amount equivalent to n channels.
JP53112105A 1978-09-11 1978-09-11 Multiplexed spread spectrum modulation method Expired JPS581580B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53112105A JPS581580B2 (en) 1978-09-11 1978-09-11 Multiplexed spread spectrum modulation method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53112105A JPS581580B2 (en) 1978-09-11 1978-09-11 Multiplexed spread spectrum modulation method

Publications (2)

Publication Number Publication Date
JPS5538776A true JPS5538776A (en) 1980-03-18
JPS581580B2 JPS581580B2 (en) 1983-01-12

Family

ID=14578261

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53112105A Expired JPS581580B2 (en) 1978-09-11 1978-09-11 Multiplexed spread spectrum modulation method

Country Status (1)

Country Link
JP (1) JPS581580B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987004883A1 (en) * 1986-02-04 1987-08-13 Advanced Systems Research Pty. Ltd. Spread-spectrum multiplexed transmission system
US6791965B2 (en) 1996-12-20 2004-09-14 Fujitsu Limited Code multiplexing transmitting apparatus
US6826169B1 (en) 1996-12-20 2004-11-30 Fujitsu Limited Code multiplexing transmitting apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6395782A (en) * 1986-10-09 1988-04-26 Video Res:Kk Time table preparing system for commercial for broadcasting

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987004883A1 (en) * 1986-02-04 1987-08-13 Advanced Systems Research Pty. Ltd. Spread-spectrum multiplexed transmission system
US6791965B2 (en) 1996-12-20 2004-09-14 Fujitsu Limited Code multiplexing transmitting apparatus
US6826169B1 (en) 1996-12-20 2004-11-30 Fujitsu Limited Code multiplexing transmitting apparatus
US7376114B2 (en) 1996-12-20 2008-05-20 Fujitsu Limited Code multiplexing transmitting apparatus

Also Published As

Publication number Publication date
JPS581580B2 (en) 1983-01-12

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