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公开(公告)号：EP4142178A1
公开(公告)日：2023-03-01
申请号：EP21193578.8
申请日：2021-08-27
IPC分类号： H04B7/185
摘要： The present invention relates to a method for managing transmit power on a communication link between a transmitter and at least one receiver. The method comprises :
a) determining a distortion metric on a signal sent from the transmitter and received in one of said receivers,
b) determining an updated transmit power value for a next signal to be sent from said transmitter, thereby taking into account said distortion metric.-
公开(公告)号：EP3879722A1
公开(公告)日：2021-09-15
申请号：EP21169391.6
申请日：2019-07-29
摘要： The present invention relates to a controller device (106) for use in a system (100) for communication via satellite (102) between a gateway (101) and a plurality of terminals (103). The controller device comprises calculation means arranged to calculate a time-frequency plan for transmitting one or more burst signals from at least one terminal of a satellite network and is arranged to transmit transmit information to each terminal of the at least one terminal based on the calculated time-frequency plan in order to allow the terminal to transmit a transmit burst signal comprising one or more forward error correction words, said transmit information for a first class of terminals comprising configuration information on one or more transmit burst signals so allowing said terminal of said first class of terminals to transmit said one or more transmit burst signals in a frame, each transmit burst signal being configured with said configuration information and having a time duration less than or equal to a duration of the frame, wherein the configuration information comprises information on at least one of {a symbol rate based on signal quality, power based on signal quality, location of groups of pilot symbols, size of groups of pilot symbols in the transmit burst signal, a preamble}.
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公开(公告)号：EP3857738A1
公开(公告)日：2021-08-04
申请号：EP19773467.6
申请日：2019-09-27
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公开(公告)号：EP3800807A1
公开(公告)日：2021-04-07
申请号：EP20199118.9
申请日：2020-09-29
发明人： DELARUELLE, Daniel
摘要： The present invention relates to a method for a logon procedure in a satellite communication system comprising at least one terminal, a satellite and either a gateway proxy on-board the satellite or a gateway. The method comprises transmitting a logon burst signal from a terminal of the satellite communication system to the gateway proxy on-board the satellite or the gateway, whereby the logon burst signal comprises one or more transmit parameter fields, each transmit parameter field corresponding to a signal transmit time or a signal transmit level or a signal transmit frequency of the logon burst signal in the terminal.
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公开(公告)号：EP4184823A1
公开(公告)日：2023-05-24
申请号：EP21209624.2
申请日：2021-11-22
发明人： DUYCK, Dieter , REYNDERS, Brecht
摘要： The invention proposes a communication system comprising
- a transmitter and one or more receivers, said transmitter arranged to transmit over a communication link a sequence of physical layer frames at a physical layer symbol rate,
- adaptive coding and modulation optimization means arranged to determine per receiver of said one or more receivers a first modulation and coding for transmitting data,
whereby the transmitter maps the data in frames using an operational modulation and coding based on the first modulation and coding and inserts encoded and modulated data frames into said sequence. The transmitter can further insert into the sequence at least one fill frame modulated (and encoded) with a first fill modulation (and coding), said first fill modulation (and coding) selected from a set of fill modulations (and codings) comprising at least one fill modulation (and coding) with a modulation order higher than QPSK.
The communication system further comprises link quality detection means to determine a metric of the communication link quality from a version of at least some of the physical layer frames received at the receive side and to convey the communication link quality metric to the adaptive coding and modulation optimization means.-
公开(公告)号：EP3968543A1
公开(公告)日：2022-03-16
申请号：EP21207666.5
申请日：2019-07-02
摘要： The present invention relates to an earth station receiver device (3) arranged for receiving a set of data transmitted in super-frames by an earth station transmitter device of a satellite communication system, whereby at least one of said super-frames contains less than 415 pilot segments, said pilot segments obtained by inserting a pilot field of 36 super-frame pilot symbols type A as defined in DVB-S2X in between each pair of consecutive blocks of 16 capacity units, said capacity units each 90 symbols long and obtained by converting a super-frame preamble comprising a start of super-frame, SOSF, and a super-frame format indicator, SFFI, and a plurality of physical layer frames whereby a first subset of capacity units corresponding to said super-frame preamble is prepended to a second subset of capacity units corresponding to the plurality of physical layer frames. The earth station receiver device comprises detection means arranged to check after each detected pilot field whether or not there is a SOSF indication.
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公开(公告)号：EP3761524A1
公开(公告)日：2021-01-06
申请号：EP20181831.7
申请日：2018-06-06
IPC分类号： H04B7/204
摘要： The present invention relates to a satellite communication system arranged for consecutively illuminating a plurality of contours on earth and comprising :
- a transmitter to generate a signal to be transmitted and comprising
* encoding means for mapping a sequence of bits, organized into a hopping frame according to a hopping plan, to a sequence of digital symbols,
* modulation means arranged for receiving said sequence of digital symbols and for modulating said digital symbols on a waveform at a symbol rate, thereby obtaining a modulated signal to be transmitted, and for transmission of the modulated signal, said modulation means being arranged for indicating when a next hopping frame is needed,
- a satellite comprising a beam hopping transponder arranged for receiving the modulated signal and for outputting a version of the modulated signal to an illumination circuit arranged in the satellite for steering illumination from one contour to another particular contour according to the hopping plan, said illumination of that one contour starting at a switching time instant,
- one or more receivers in said particular contour of the contours to be illuminated and arranged for receiving the outputted signal,
- a central controller having an established communication link with at least one of the receivers and arranged for receiving via an established link information on observed illumination transitions, said central controller comprising computation means for computing an adjusted symbol rate for the transmitter based on a comparison of the observed illumination transitions with a target switching time instant.-
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公开(公告)号：EP4416878A1
公开(公告)日：2024-08-21
申请号：EP22817774.7
申请日：2022-11-17
发明人： DUYCK, Dieter , REYNDERS, Brecht
CPC分类号： H04B7/18523 , H04L1/0004 , H04L1/001 , H04L1/20
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