SE7500358A - - Google Patents


Publication number
SE7500358A SE7500358A SE7500358A SE7500358A SE 7500358 A SE7500358 A SE 7500358A SE 7500358 A SE7500358 A SE 7500358A SE 7500358 A SE7500358 A SE 7500358A SE 7500358 A SE7500358 A SE 7500358A
Prior art keywords
initial access
Prior art date
Application number
Other versions
SE408115B (en
U Reiner
J Zilg
Original Assignee
Siemens Ag
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
Priority to DE19742401604 priority Critical patent/DE2401604B2/en
Application filed by Siemens Ag filed Critical Siemens Ag
Publication of SE7500358A publication Critical patent/SE7500358A/xx
Publication of SE408115B publication Critical patent/SE408115B/en



    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/14Relay systems
    • H04B7/15Active relay systems
    • H04B7/204Multiple access
    • H04B7/212Time-division multiple access [TDMA]
    • H04B7/2125Synchronisation
    • H04B7/2126Synchronisation using a reference station


1488572 Satellite TDMA communication system SIEMENS AG 3 Jan 1975 [14 Jan 1974] 226/75 Heading H4M In a satellite communication system wherein transmitted bursts comprising TDM signal channels together with a preamble from different ground stations are combined in time staggered fashion to form a TDM block at a satellite and are retransmitted therefrom, the time required for phase correction of a burst before it is initially transmitted from a ground station is considerably reduced relative to that required in the prior art. For a particular ground station BSt2 to effect initial access it transmits an initial access signal (operation (a) (Fig. 3)) at a substantially lower level than effective signals to the satellite Sa, receives this initial access signal when retransmitted from the satellite and monitors the position of the signal as it appears in the TDM block (b). As a result of this the transmission phase at the ground station is adjusted to an intermediate phase, displaced from the desired proper phase at which burst transmission should occur by about half the possible tolerance in measuring the phase deviation between the initial access signal and the desired phase (c). The burst preamble adjusted to this intermediate phase is then transmitted (d) and is fine adjusted to the intermediate phase by a burst transmission phase control system making use of the ground stationsatellite loop (e). The burst preamble is next incrementally phase shifted by a programmed control arrangement not using the station-satellite loop to the desired phase (f). Thereafter the complete burst is transmitted (g) and held at the desired phase by the station-satellite phase control system.
SE7500358A 1974-01-14 1975-01-14 Method for transferring messages via satellite SE408115B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19742401604 DE2401604B2 (en) 1974-01-14 1974-01-14 nachrichtenuebertragungsverfahren satellite

Publications (2)

Publication Number Publication Date
SE7500358A true SE7500358A (en) 1975-07-15
SE408115B SE408115B (en) 1979-05-14



Family Applications (1)

Application Number Title Priority Date Filing Date
SE7500358A SE408115B (en) 1974-01-14 1975-01-14 Method for transferring messages via satellite

Country Status (16)

Country Link
US (1) US4010420A (en)
AR (1) AR204189A1 (en)
AT (1) AT345347B (en)
AU (1) AU467213B2 (en)
BE (1) BE824368A (en)
CA (1) CA1054731A (en)
CH (1) CH573194A5 (en)
DE (1) DE2401604B2 (en)
FI (1) FI61374C (en)
FR (1) FR2258063B1 (en)
GB (1) GB1488572A (en)
IN (1) IN144680B (en)
IT (1) IT1028340B (en)
NL (1) NL167561C (en)
SE (1) SE408115B (en)
YU (1) YU7675A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2607433C3 (en) * 1976-02-24 1980-01-17 Siemens Ag
GB1583342A (en) * 1976-07-30 1981-01-28 Marconi Co Ltd Satellite communication systems
US4346470A (en) * 1980-03-21 1982-08-24 Ibm Corporation Initial acquisition of synchronization for a station in a TDMA satellite communication network
FR2502426B1 (en) * 1981-03-20 1984-07-27 Trt Telecom Radio Electr
JPH0117620B2 (en) * 1982-03-10 1989-03-31 Nippon Electric Co
US4587661A (en) * 1983-03-04 1986-05-06 Rca Corporation Apparatus for synchronizing spread spectrum transmissions from small earth stations used for satellite transmission
US4577316A (en) * 1984-02-13 1986-03-18 Rca Corporation Synchronization system for a regenerative subtransponder satellite communication system
ES2048052B1 (en) * 1991-09-05 1996-01-16 Alcatel Standard Electrica Architecture for optical fiber systems division multiple access time
JPH0787424B2 (en) * 1993-06-30 1995-09-20 日本電気株式会社 Burst signal transmission system
JP5355936B2 (en) * 2007-06-28 2013-11-27 日本信号株式会社 Reader / writer and article sorting system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3418579A (en) * 1964-09-08 1968-12-24 Comm And Systems Inc Satellite communication synchronizing system
US3530252A (en) * 1966-11-16 1970-09-22 Communications Satellite Corp Acquisition technique for time division multiple access satellite communication system
US3532985A (en) * 1968-03-13 1970-10-06 Nasa Time division radio relay synchronizing system using different sync code words for "in sync" and "out of sync" conditions
DE1940958B2 (en) * 1968-08-15 1971-11-04 Time division multiple messaging system
JPS5011735B1 (en) * 1968-12-10 1975-05-06
US3795772A (en) * 1972-05-01 1974-03-05 Us Navy Synchronization system for pulse orthogonal multiplexing systems
US3813496A (en) * 1972-10-02 1974-05-28 Communications Satellite Corp Tdma bursts acquisition system
US3843843A (en) * 1972-10-30 1974-10-22 Rca Corp A time division multiple access synchronization technique

Also Published As

Publication number Publication date
GB1488572A (en) 1977-10-12
FR2258063A1 (en) 1975-08-08
FI61374C (en) 1982-07-12
CA1054731A1 (en)
FI750081A (en) 1975-07-15
AT345347B (en) 1978-09-11
AR204189A1 (en) 1975-11-28
NL167561B (en) 1981-07-16
BE824368A1 (en)
BE824368A (en) 1975-07-14
CH573194A5 (en) 1976-02-27
IT1028340B (en) 1979-01-30
FI61374B (en) 1982-03-31
NL167561C (en) 1981-12-16
DE2401604A1 (en) 1975-07-17
CA1054731A (en) 1979-05-15
SE408115B (en) 1979-05-14
YU7675A (en) 1982-05-31
IN144680B (en) 1978-06-17
AU467213B2 (en) 1975-11-27
FR2258063B1 (en) 1980-04-30
AU7730375A (en) 1975-11-27
ATA23375A (en) 1978-01-15
DE2401604B2 (en) 1976-08-12
US4010420A (en) 1977-03-01
NL7500433A (en) 1975-07-16

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