CA2083776A1 - Digital communication system using superposed transmission of high speed and low speed digital signals - Google Patents

Digital communication system using superposed transmission of high speed and low speed digital signals

Info

Publication number
CA2083776A1
CA2083776A1 CA2083776A CA2083776A CA2083776A1 CA 2083776 A1 CA2083776 A1 CA 2083776A1 CA 2083776 A CA2083776 A CA 2083776A CA 2083776 A CA2083776 A CA 2083776A CA 2083776 A1 CA2083776 A1 CA 2083776A1
Authority
CA
Canada
Prior art keywords
digital signals
speed digital
low speed
signals
high speed
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
CA2083776A
Other languages
French (fr)
Other versions
CA2083776C (en
Inventor
Takatoshi Sugiyama
Shuji Kubota
Masahiro Morikura
Kiyoshi Enomoto
Shuzo Kato
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
Takatoshi Sugiyama
Shuji Kubota
Masahiro Morikura
Kiyoshi Enomoto
Shuzo Kato
Nippon Telegraph & Telephone Corporation
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 Takatoshi Sugiyama, Shuji Kubota, Masahiro Morikura, Kiyoshi Enomoto, Shuzo Kato, Nippon Telegraph & Telephone Corporation filed Critical Takatoshi Sugiyama
Publication of CA2083776A1 publication Critical patent/CA2083776A1/en
Application granted granted Critical
Publication of CA2083776C publication Critical patent/CA2083776C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/204—Multiple access
    • H04B7/216—Code division or spread-spectrum multiple access [CDMA, SSMA]

Abstract

A digital communication system using superposed transmission of high and low speed digital signals capable of transmitting superposed high and low speed digital signals through an identical frequency band efficiently by increasing a simultaneously transmittable number of channels in the low speed digital signals, while achieving the practically reasonable bit error rate performances for both the high speed digital signals and the low speed digital signals. In this system, the low speed digital signals are transmitted in a form of spread spectrum signals and the high speed digital signals are cancelled out from the superposed transmission signals in obtaining the output low speed digital signals by using the phase inverted replica of the high speed digital signals to be combined with the superposed transmission signals, so that it becomes possible to increase a number of channels for the low speed digital signals, while achieving the practically reasonable bit error rate performances for both the high speed digital signals and the low speed digital signals.
CA 2083776 1991-11-26 1992-11-25 Digital communication system using superposed transmission of high speed and low speed digital signals Expired - Lifetime CA2083776C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JPP3-310782 1991-11-26
JP31078291A JP2554219B2 (en) 1991-11-26 1991-11-26 Digital signal superposition transmission method

Publications (2)

Publication Number Publication Date
CA2083776A1 true CA2083776A1 (en) 1993-05-27
CA2083776C CA2083776C (en) 1998-09-29

Family

ID=18009406

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2083776 Expired - Lifetime CA2083776C (en) 1991-11-26 1992-11-25 Digital communication system using superposed transmission of high speed and low speed digital signals

Country Status (5)

Country Link
US (1) US5280537A (en)
EP (1) EP0545225B1 (en)
JP (1) JP2554219B2 (en)
CA (1) CA2083776C (en)
DE (1) DE69230663T2 (en)

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Also Published As

Publication number Publication date
JPH05153086A (en) 1993-06-18
JP2554219B2 (en) 1996-11-13
EP0545225B1 (en) 2000-02-09
EP0545225A2 (en) 1993-06-09
DE69230663T2 (en) 2000-07-06
US5280537A (en) 1994-01-18
CA2083776C (en) 1998-09-29
EP0545225A3 (en) 1994-04-13
DE69230663D1 (en) 2000-03-16

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