GB1363451A – System for dispersing energy in a radiotelegraphic communication channel
– Google Patents
GB1363451A – System for dispersing energy in a radiotelegraphic communication channel
– Google Patents
System for dispersing energy in a radiotelegraphic communication channel
Info
Publication number
GB1363451A
GB1363451A
GB3649871A
GB3649871A
GB1363451A
GB 1363451 A
GB1363451 A
GB 1363451A
GB 3649871 A
GB3649871 A
GB 3649871A
GB 3649871 A
GB3649871 A
GB 3649871A
GB 1363451 A
GB1363451 A
GB 1363451A
Authority
GB
United Kingdom
Prior art keywords
signal
digital
combined
communication channel
combiner
Prior art date
1970-08-03
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.)
Expired
Application number
GB3649871A
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.)
KDDI Corp
Original Assignee
Kokusai Denshin Denwa KK
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.)
1970-08-03
Filing date
1971-08-03
Publication date
1974-08-14
1971-08-03
Application filed by Kokusai Denshin Denwa KK
filed
Critical
Kokusai Denshin Denwa KK
1974-08-14
Publication of GB1363451A
publication
Critical
patent/GB1363451A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04B—TRANSMISSION
H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 – H04B13/00; Details of transmission systems not characterised by the medium used for transmission
H04B1/69—Spread spectrum techniques
H04B1/707—Spread spectrum techniques using direct sequence modulation
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
H04L25/00—Baseband systems
H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
H04L25/40—Transmitting circuits; Receiving circuits
H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
H04L25/4904—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using self-synchronising codes, e.g. split-phase codes
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
H04L27/00—Modulated-carrier systems
H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
Abstract
1363451 Telegraphy KOKUSAI DENSHIN DENWA KK 3 Aug 1971 [3 Aug 1970] 36498/71 Heading H4P To reduce peaks in the power spectrum of a digital phase or frequency modulated radio carrier wave, the modulating digital signal is combined with a digital noise signal prior to modulation. An analogue signal is converted in a coder 1, driven by clock source 5, to a digital signal V 1 which is combined in a combiner 2 with a digital noise signal V 2 from generator 3. The resulting signal phase, or frequency, modulates a radio carrier (4). The combiner may be an exclusive OR or NOR circuit. In a receiver the demodulated signal is combined with a locally generated digital noise signal in a similar combining circuit to extract the original digital signal. The arrangement may be used in a radio telegraphic communication channel and a station identification signal UV may be added to each frame.
GB3649871A
1970-08-03
1971-08-03
System for dispersing energy in a radiotelegraphic communication channel
Expired
GB1363451A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
JP6730370
1970-08-03
Publications (1)
Publication Number
Publication Date
GB1363451A
true
GB1363451A
(en)
1974-08-14
Family
ID=13341091
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB3649871A
Expired
GB1363451A
(en)
1970-08-03
1971-08-03
System for dispersing energy in a radiotelegraphic communication channel
Country Status (2)
Country
Link
CA
(1)
CA953367A
(en)
GB
(1)
GB1363451A
(en)
Cited By (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
EP0174989A1
(en)
*
1984-03-20
1986-03-26
Applied Spectrum Technologies, Inc.
Data and voice communications system
GB2265068A
(en)
*
1992-03-11
1993-09-15
Soundcraft Electronics Ltd
Digital control of audio analogue systems
US6942706B2
(en)
2002-08-20
2005-09-13
Invista North America S.A.R.L.
Vat acid dyeing of textile fibers
GB2461590A
(en)
*
1982-08-11
2010-01-13
Electronique Serge Dassault
Elimination of interference introduced by switching of the respective channels of a pulse radar
1971
1971-07-30
CA
CA119,515A
patent/CA953367A/en
not_active
Expired
1971-08-03
GB
GB3649871A
patent/GB1363451A/en
not_active
Expired
Cited By (8)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2461590A
(en)
*
1982-08-11
2010-01-13
Electronique Serge Dassault
Elimination of interference introduced by switching of the respective channels of a pulse radar
GB2461590B
(en)
*
1982-08-11
2010-06-23
Electronique Serge Dassault
Process and device for elimination of the effect of clutter signals associated with switching of the receiving channels of a pulse radar
EP0174989A1
(en)
*
1984-03-20
1986-03-26
Applied Spectrum Technologies, Inc.
Data and voice communications system
EP0174989A4
(en)
*
1984-03-20
1988-11-02
Applied Spectrum Tech
Data and voice communications system.
GB2265068A
(en)
*
1992-03-11
1993-09-15
Soundcraft Electronics Ltd
Digital control of audio analogue systems
US5454040A
(en)
*
1992-03-11
1995-09-26
Soundcraft Electronics Limited
Digital control of analog systems
GB2265068B
(en)
*
1992-03-11
1995-10-04
Soundcraft Electronics Ltd
Improvements in or relating to the digital control of analogue audio systems
US6942706B2
(en)
2002-08-20
2005-09-13
Invista North America S.A.R.L.
Vat acid dyeing of textile fibers
Also Published As
Publication number
Publication date
CA953367A
(en)
1974-08-20
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Legal Events
Date
Code
Title
Description
1974-12-27
PS
Patent sealed
1991-04-03
PCNP
Patent ceased through non-payment of renewal fee
