JPH04360434A - Spread spectrum transmitter and spread spectrum receiver - Google Patents

Spread spectrum transmitter and spread spectrum receiver

Info

Publication number
JPH04360434A
JPH04360434A JP3136527A JP13652791A JPH04360434A JP H04360434 A JPH04360434 A JP H04360434A JP 3136527 A JP3136527 A JP 3136527A JP 13652791 A JP13652791 A JP 13652791A JP H04360434 A JPH04360434 A JP H04360434A
Authority
JP
Japan
Prior art keywords
data
spread
parallel
spread spectrum
serial
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
JP3136527A
Inventor
Michihiro Izumi
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP3136527A priority Critical patent/JPH04360434A/en
Publication of JPH04360434A publication Critical patent/JPH04360434A/en
Priority claimed from US08/259,122 external-priority patent/US5467367A/en
Application status is Pending legal-status Critical

Links

Abstract

PURPOSE: To quicken the spread spectrum transmission by generating plural spread codes with a different phase from a spread code respectively so as to send the code in parallel.
CONSTITUTION: A serial base band data 201 is converted into an n-channel parallel data by a serial/parallel converter 202. On the other hand, a spread code generated by a spread code generator 203 is inputted to delay circuits 241-243 and a parallel data is modulated by modulators 251-253. A spread modulation data is added by an adder 206 analogically, converted into one channel data and the result is inputted to a multiplier 211. Then the signal is multiplied with an output a synchronization spread code generator 208, amplified by an amplifier 212 and the result is sent as a radio signal. A receiver side applies prescribed processing synchronously with the sender side and the same data as the base band data 201 is demodulated, The n-bit data is communicated in parallel in this way, the communication is attained at a speed being a multiple of (n) of the speed of the serial communication.
COPYRIGHT: (C)1992,JPO&Japio
JP3136527A 1991-06-07 1991-06-07 Spread spectrum transmitter and spread spectrum receiver Pending JPH04360434A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3136527A JPH04360434A (en) 1991-06-07 1991-06-07 Spread spectrum transmitter and spread spectrum receiver

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP3136527A JPH04360434A (en) 1991-06-07 1991-06-07 Spread spectrum transmitter and spread spectrum receiver
US08/259,122 US5467367A (en) 1991-06-07 1994-06-13 Spread spectrum communication apparatus and telephone exchange system

Publications (1)

Publication Number Publication Date
JPH04360434A true JPH04360434A (en) 1992-12-14

Family

ID=15177271

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3136527A Pending JPH04360434A (en) 1991-06-07 1991-06-07 Spread spectrum transmitter and spread spectrum receiver

Country Status (1)

Country Link
JP (1) JPH04360434A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07170210A (en) * 1993-12-16 1995-07-04 Nec Corp Spread spectrum modulating/demodulating method and modem using the same
JPH07183829A (en) * 1993-12-24 1995-07-21 Nec Corp Radio data communication equipment
US5586113A (en) * 1993-11-08 1996-12-17 Ntt Mobile Communications Network Inc. CDMA communications method and system
JPH09139693A (en) * 1995-11-15 1997-05-27 Nec Corp Phase modulation multiplex transmitter
JPH09153843A (en) * 1995-11-30 1997-06-10 Nec Corp Code multiplex communication equipment
JPH09321661A (en) * 1996-03-28 1997-12-12 Y R P Ido Tsushin Kiban Gijutsu Kenkyusho:Kk Spread spectrum communication system
JPH09321656A (en) * 1996-05-29 1997-12-12 Saitama Nippon Denki Kk Code division clock transmission system
US5737329A (en) * 1995-04-14 1998-04-07 Kabushiki Kaisha Toshiba Spread spectrum communication apparatus
JPH10233752A (en) * 1997-02-19 1998-09-02 Nec Corp Message transmission system
US5949816A (en) * 1996-03-05 1999-09-07 Sharp Kabushiki Kaisha Spread spectrum communication apparatus
US5960028A (en) * 1995-08-11 1999-09-28 Sharp Kabushiki Kaisha Spread spectrum communication system
US6212222B1 (en) 1999-01-20 2001-04-03 Mitsubishi Denki Kabushiki Kaisha Initial acquisition circuit

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5586113A (en) * 1993-11-08 1996-12-17 Ntt Mobile Communications Network Inc. CDMA communications method and system
JPH07170210A (en) * 1993-12-16 1995-07-04 Nec Corp Spread spectrum modulating/demodulating method and modem using the same
JPH07183829A (en) * 1993-12-24 1995-07-21 Nec Corp Radio data communication equipment
US6363100B1 (en) 1993-12-24 2002-03-26 Nec Corporation Radio data communication system using spread spectrum scheme
US5737329A (en) * 1995-04-14 1998-04-07 Kabushiki Kaisha Toshiba Spread spectrum communication apparatus
US5960028A (en) * 1995-08-11 1999-09-28 Sharp Kabushiki Kaisha Spread spectrum communication system
EP0758823A3 (en) * 1995-08-11 2000-05-17 Sharp Kabushiki Kaisha Spread spectrum communication system
JPH09139693A (en) * 1995-11-15 1997-05-27 Nec Corp Phase modulation multiplex transmitter
US6295273B1 (en) 1995-11-15 2001-09-25 Nec Corporation Phase modulation multiplexing transmission unit and phase modulation multiplexing method
JPH09153843A (en) * 1995-11-30 1997-06-10 Nec Corp Code multiplex communication equipment
US5949816A (en) * 1996-03-05 1999-09-07 Sharp Kabushiki Kaisha Spread spectrum communication apparatus
JPH09321661A (en) * 1996-03-28 1997-12-12 Y R P Ido Tsushin Kiban Gijutsu Kenkyusho:Kk Spread spectrum communication system
JPH09321656A (en) * 1996-05-29 1997-12-12 Saitama Nippon Denki Kk Code division clock transmission system
JPH10233752A (en) * 1997-02-19 1998-09-02 Nec Corp Message transmission system
US6212222B1 (en) 1999-01-20 2001-04-03 Mitsubishi Denki Kabushiki Kaisha Initial acquisition circuit

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