JPS5710554A - Modulation and demodulation device for frequency spread multiplex communication - Google Patents

Modulation and demodulation device for frequency spread multiplex communication

Info

Publication number
JPS5710554A
JPS5710554A JP8436580A JP8436580A JPS5710554A JP S5710554 A JPS5710554 A JP S5710554A JP 8436580 A JP8436580 A JP 8436580A JP 8436580 A JP8436580 A JP 8436580A JP S5710554 A JPS5710554 A JP S5710554A
Authority
JP
Japan
Prior art keywords
signal
series
pseudo
line
modulation
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
JP8436580A
Other languages
Japanese (ja)
Other versions
JPS6334663B2 (en
Inventor
Botaro Hirosaki
Satoshi Hasegawa
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 JP8436580A priority Critical patent/JPS5710554A/en
Publication of JPS5710554A publication Critical patent/JPS5710554A/en
Publication of JPS6334663B2 publication Critical patent/JPS6334663B2/ja
Granted legal-status Critical Current

Links

Classifications

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

Abstract

PURPOSE:To prevent the deterioration of performance of multiplex system, by obtaining information signal through the product modulation of pseudo maximum length series code with an input information signal at modulation side of each subscriber and through the detection of correlation at demodulation side. CONSTITUTION:A binary information series 251 with a pseudo m-series signal 253 is modulated and outputted 252 at a multiplication circuit 201 to be an output signal to a transmission line. A pseudo m-series generator 203 produces a pseudo m-series for subscriber in synchronizing with a frame synchronizing signal 257 by using a master clock 257 and outputs it to a signal line 256. The signal from a signal line 255 is multiplied with the pseudo m-series at a multiplication circuit 204 and is outputted on a signal line 258. The signal on the line 258 is inputted to an integration discrimination circuit 205, and after the integration for one frame is made, discrimination is made and output is given to a signal line 259 as binary series. This binary series is demodulated into the original information signal at a demodulator 206 and outputted to a signal line 260.
JP8436580A 1980-06-20 1980-06-20 Modulation and demodulation device for frequency spread multiplex communication Granted JPS5710554A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8436580A JPS5710554A (en) 1980-06-20 1980-06-20 Modulation and demodulation device for frequency spread multiplex communication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8436580A JPS5710554A (en) 1980-06-20 1980-06-20 Modulation and demodulation device for frequency spread multiplex communication

Publications (2)

Publication Number Publication Date
JPS5710554A true JPS5710554A (en) 1982-01-20
JPS6334663B2 JPS6334663B2 (en) 1988-07-12

Family

ID=13828493

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8436580A Granted JPS5710554A (en) 1980-06-20 1980-06-20 Modulation and demodulation device for frequency spread multiplex communication

Country Status (1)

Country Link
JP (1) JPS5710554A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS594244A (en) * 1982-06-29 1984-01-11 Toshiba Corp Code generator for frequency selection
JPS594243A (en) * 1982-06-29 1984-01-11 Toshiba Corp Code generator for frequency selection
JPH0552053U (en) * 1991-12-18 1993-07-09 積水化学工業株式会社 Eaves gutter connection structure
WO2005071858A1 (en) * 2004-01-26 2005-08-04 Seiko Epson Corporation Information transmission system, electronic apparatus, and wireless communication terminal
JP2005210611A (en) * 2004-01-26 2005-08-04 Seiko Epson Corp Information transmitting system and electronic apparatus
JP2005217799A (en) * 2004-01-29 2005-08-11 Seiko Epson Corp Electronic apparatus

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS594244A (en) * 1982-06-29 1984-01-11 Toshiba Corp Code generator for frequency selection
JPS594243A (en) * 1982-06-29 1984-01-11 Toshiba Corp Code generator for frequency selection
JPH0427742B2 (en) * 1982-06-29 1992-05-12 Tokyo Shibaura Electric Co
JPH0427741B2 (en) * 1982-06-29 1992-05-12 Tokyo Shibaura Electric Co
JPH0552053U (en) * 1991-12-18 1993-07-09 積水化学工業株式会社 Eaves gutter connection structure
WO2005071858A1 (en) * 2004-01-26 2005-08-04 Seiko Epson Corporation Information transmission system, electronic apparatus, and wireless communication terminal
JP2005210611A (en) * 2004-01-26 2005-08-04 Seiko Epson Corp Information transmitting system and electronic apparatus
JP2005217799A (en) * 2004-01-29 2005-08-11 Seiko Epson Corp Electronic apparatus

Also Published As

Publication number Publication date
JPS6334663B2 (en) 1988-07-12

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