Abstract: A method for a logon procedure in a 5GNR non-terrestrial network is provided, which includes at least one user equipment, a satellite and either a gNodeB base station or a gNodeB base station on-board the satellite or a gateway. The method includes transmitting a logon burst signal from a user equipment of the satellite communication system to the gNodeB base station or gNodeB base station on-board the satellite. The logon burst signal includes 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 user equipment.

Abstract: A method for a logon procedure in a 5GNR non-terrestrial network is provided, which includes at least one user equipment, a satellite and either a gNodeB base station or a gNodeB base station on-board the satellite or a gateway. The method includes transmitting a logon burst signal from a user equipment of the satellite communication system to the gNodeB base station or gNodeB base station on-board the satellite. The logon burst signal includes 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 user equipment.

Abstract: A transmission system includes encoding and modulation means for encoding and mapping a plurality of baseband frames of information bits, each baseband frame associated with a modulation and coding type, to a plurality of frames of encoded and modulated symbols; generator means to generate one or more values to determine a superframe length; framing means arranged for inserting synchronization symbols and preambles into frames of the plurality of frames of encoded and modulated symbols, so obtaining a plurality of superframes, each preamble indicating the start of a superframe; spreading means arranged to receive the plurality of superframes (or a version thereof), and to spread each symbol in the plurality of superframes with a spreading sequence to a chip sequence, so obtaining a plurality of spread superframes. One or more values determine for a current superframe a frame length different from the frame length of the preceding superframe.

Abstract: A method of communication in a wireless communication system includes a gateway and one or more terminals. The method involves scheduling a first plurality of resource elements for downlink transmission of payload data in a first physical channel with a given power spectral density; scheduling a second plurality of resource elements for downlink transmission of broadcast information and/or control information related to the downlink transmission in the first physical channel; transmitting the payload data in the first physical channel and the broadcast information and/or control information in at least the second physical channel; demodulating and decoding in at least one terminal the broadcast information and/or a subset of the control information in the second physical channel; and demodulating and decoding in the at least one terminal the payload data in the first physical channel based on the demodulated and decoded broadcast information and/or control information.

Abstract: A method for adjusting transmit power of a terminal transmitter on a return link between the terminal transmitter and a receiver. The method includes: a) determining on a version of at least one data burst signal comprised in the receive signal, and a first metric is indicative of the amount of non-linear distortion with which the version of the at least one data burst signal is impaired; b) determining on at least a part of the receive signal a second metric indicative of at least one impairment other than the amount of non-linear distortion; c) determining an updated transmit power value for a next data burst signal to be sent from the first terminal transmitter, thereby taking into account the first and second metric.

Abstract: A method is provided for adjusting at least one transmit parameter of a digital transmitter of a communication system by estimating phase noise of a sequence of symbols received in a demodulator of a digital receiver of the communication system. The method includes: measuring a phase for the symbols of the sequence, deriving a total phase error for the sequence from the measured phases, determining a characteristic of the total phase error, deriving, based on a signal quality estimation of the received sequence of symbols, an indication of a contribution to the characteristic from at least one impairment different from phase noise, obtaining a phase noise estimation by subtracting the indication of the contribution from the characteristic of the total phase error, adjusting the at least one transmit parameter depending on the obtained phase noise estimation.

Abstract: A system for communication via satellite between a gateway and a plurality of terminals comprises: a controller device to calculate a time-frequency plan of burst signals from a terminal and to transmit, based on the time-frequency plan, to the terminal information including configuration information on transmit burst signals; a multi-carrier demodulator structure arranged to receive a resulting signal comprising receive signals and arranged to receive information for the receive signals.

Abstract: A system for communication via satellite between a gateway and a plurality of terminals comprises: a controller device to calculate a time-frequency plan of burst signals from a terminal and to transmit, based on the time-frequency plan, to the terminal information including configuration information on transmit burst signals; a multi-carrier demodulator structure arranged to receive a resulting signal comprising receive signals and arranged to receive information for the receive signals.

Abstract: A method is provided for adjusting at least one transmit parameter of a digital transmitter of a communication system by estimating phase noise of a sequence of symbols received in a demodulator of a digital receiver of the communication system. The method includes: measuring a phase for the symbols of the sequence, deriving a total phase error for the sequence from the measured phases, determining a characteristic of the total phase error, deriving, based on a signal quality estimation of the received sequence of symbols, an indication of a contribution to the characteristic from at least one impairment different from phase noise, obtaining a phase noise estimation by subtracting the indication of the contribution from the characteristic of the total phase error, adjusting the at least one transmit parameter depending on the obtained phase noise estimation.

Abstract: A method for adjusting transmit power of a terminal transmitter on a return link between the terminal transmitter and a receiver. The method includes: a) determining on a version of at least one data burst signal comprised in the receive signal, and a first metric is indicative of the amount of non-linear distortion with which the version of the at least one data burst signal is impaired; b) determining on at least a part of the receive signal a second metric indicative of at least one impairment other than the amount of non-linear distortion; c) determining an updated transmit power value for a next data burst signal to be sent from the first terminal transmitter, thereby taking into account the first and second metric.

Abstract: The present invention relates to a method for a logon procedure in a 5GNR non-terrestrial network comprising at least one user equipment, a satellite and either a gNodeB base station or a gNodeB_base station on-board the satellite or a gateway. The method comprises transmitting a logon burst signal from a user equipment of the satellite communication system to the gNodeB base station or gNodeB base station on-board the satellite, 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 user equipment.

Abstract: A system for communication via satellite between a gateway and a plurality of terminals comprises: a controller device to calculate a time-frequency plan of burst signals from a terminal and to transmit, based on the time-frequency plan, to the terminal information including configuration information on transmit burst signals; a multi-carrier demodulator structure arranged to receive a resulting signal comprising receive signals and arranged to receive information for the receive signals.