A system for transmitting signals includes Orbital Angular Momentum (OAM) processing circuitry for receiving a plurality of input signals and applying a different orbital angular momentum to each of the plurality of input signals for transmission to a second location. Electromagnetic knot processing circuitry receives a plurality of OAM processed signals from the OAM processing circuitry and applies an electromagnetic knot to each of the received OAM processed signal before transmission to the second location. Multiplexing circuitry multiplexes the plurality of OAM/electromagnetic knot processed signals into a single multiplexed OAM/electromagnetic knot processed signal. A first signal degradation caused by environmental factors of the OAM/electromagnetic knot processed signal is improved over a second signal degradation caused by the environmental factors of a signal not including the electromagnetic knot. A transmitter transmits the single multiplexed OAM/electromagnetic knot processed signal to the second location.

An adjustable payload for small geostationary communication satellites is disclosed. In an example, a communication satellite includes a payload system having a software defined payload that is configured to provide communication services. The software defined payload includes a processor for providing at least one of gain control per transponder and carrier/sub-channel, channelization, channel routing, signal conditioning or equalization, spectrum analysis, interference detection, regenerative or modem processing, bandwidth flexibility, digital beamforming, digital pre-distortion or power amplifier linearization, for at least one user slice for a plurality of user terminals and at least one gateway slice for a gateway station. The software defined payload also includes an input side and an output side for each slice. Each input side includes an input filter and an analog-to-digital converter and each output side includes an output filter and a digital-to-analog converter. The payload system also includes antennas communicatively coupled to the software defined payload.

A system and method for managing a transmit power of a terminal includes dividing a spectrum into frequency bins and an inroute layout including inroutes; mapping at least one of the frequency bins with each of the inroute; determining a respective normalized Transmit Power (TP) for each of the frequency bins; calculating a transmission TP based on the respective normalized TP of one or more of the frequency bins mapped to a selected inroute; and transmitting a radio signal with the transmission TP on the selected inroute. A first frequency bin is adjacent a second frequency bin, a respective normalized TP of the first frequency bin compared to a respective normalized TP of the second frequency bin varies no more than a threshold power delta, a count of frequency bins is greater than one and unequal to a count of the inroute layout.

Systems, apparatuses, methods, and software are described herein that provide enhanced satellite communication nodes. In one example, a parent communication node is configured to establish a satellite edge network over at least a satellite communication pathway with a child communication node remotely located from a geographic location of the parent node. The child communication node is configured to communicate over at least the satellite communication pathway to establish a connection to the satellite edge network and route communications of a local communication interface to the satellite edge network.

A method and system for determining inroute frame timing for a Very Small Aperture Terminal (VSAT) includes receiving an appointment to transmit, on an inroute, at a start of a slot X of a frame number M; establishing, at a VSAT, an arrival time of a super frame numbering packet (SFNP) including a satellite ephemeris vector and a frame number N; calculating, at the VSAT, a timing offset (T.sub.RO) to be applied to the arrival time to compensate for a time varying gateway-satellite-terminal propagation delay (T.sub.HS+T.sub.SR); setting a transmit instant as an end of the T.sub.RO after the arrival time; adding to the transmit instant a duration of X slots and a duration of (M-N) frames; and transmitting a burst, on the inroute from the VSAT, at the transmit instant. In the method, the calculating is based on computing T.sub.HS+T.sub.SR from the satellite ephemeris vector, a gateway transmits the SFNP and receives the burst in the slot X within the frame number M of the inroute, and N is greater than or equal to M. A method and system for using ephemeris data for inroute timing is disclosed.

A method performed by a first network node (101) for enabling a second feeder link (132) to be established between a second network node (102) and an airborne or orbital communication node (110) in non-terrestrial communications network (100) to handle wireless devices (121) being served by the airborne or orbital communication node (110) is provided. The first network node (101) is handling the wireless devices (121) served by the airborne or orbital communication node (110) over a first feeder link (131) between the first network node (101) and the airborne or orbital communication node (110). The method comprises determining (701) that the wireless devices served by the airborne or orbital communication node (110) are to be handled by the second network node (102) over the second feeder link (132). Also, the method comprises initiating (702) the second feeder link (132) to be established between the second network node (102) and the airborne or orbital communication node (110). Further, a first network node (101) for enabling a second feeder link (132) to be established between a second network node (102) and an airborne or orbital communication node (110) in non-terrestrial communications network (100) to handle wireless devices (121) being served by the airborne or orbital communication node (110) is also provided. A second network node and a method therein, as well as, computer programs and carriers are further provided.

A portable station device performs: a coarse adjustment to the antenna direction of a target communication satellite, the antenna direction being calculated based on the longitude of the target communication satellite from satellite information about the longitudes of communication satellites, a beacon signal, and a telemetry signal and the installation location of the portable station device; measurement of the frequencies of the beacon signal and the telemetry signal; determination of whether the measured frequencies of the beacon signal and the telemetry signal are correct or not with reference to the frequencies of the beacon signal and the telemetry signal of the target communication satellite in the satellite information; and a fine adjustment on the antenna direction such that the beacon signal received in the coarsely adjusted antenna direction reaches the highest reception level, if the determination is correct.

A method, network node and wireless device for reliable link performance for cellular Internet of things (IoT) and New Radio (NR) in non-terrestrial networks. In some embodiments, a network node configured to operate in a cellular non-terrestrial network is provided. The network node includes processing circuitry configured to provide an indication of transmission property information associated with a reconfiguration of precoding weights where the indication of transmission property information provides information associated with decoding a physical downlink shared channel or physical downlink control channel

A system includes a satellite communications terminal including a computer programmed to provide communications for user devices with a destination network. The computer detects a physical state or change in a physical state specified as a trigger to transfer the communications for the user devices with the destination network from a satellite communications channel to a cellular communications channel. Upon detecting the trigger event, the computer establishes a communications link with a cellular device and provides communications for the user devices with the destination network via the cellular device and the cellular communications channel.

Telemedicine systems and methods are described. In a telemedicine system operable to communicate with a remote operations center, communications can be transmitted/received using a transceiver having an antenna. The antenna can include first and second di-pole antenna elements, the first di-pole antenna element being vertically polarized and the second di-pole antenna element being horizontally polarized. A controller of the system can establish, using the transceiver, a telemedicine session with the operations center using a Transport Morphing Protocol (TMP), the TMP being an acknowledgement-based user datagram protocol. The controller can also mask one or more transient network degradations to increase resiliency of the telemedicine session. The telemedicine system can include a 2D and 3D carotid Doppler and transcranial Doppler and/or other diagnostic devices, and provides for real-time connectivity and communication between medical personnel in an emergency vehicle and a receiving hospital for immediate diagnosis and treatment to a patient in need.