Systems and methods are disclosed herein for adaptively coordinating among satellite communication channels. A method, according to an example implementation of the disclosed technology, can include: receiving, at a radio frequency receiver disposed on a target satellite, a plurality of signals associated with a corresponding plurality of candidate satellite communication channels; detecting, among the plurality of signals, a command structure; selecting, for communications with a first ground station, a first channel of the candidate satellite communication channels, based at least in part, on information in the detected command structure; establishing a communication link with the first ground station using the first channel; receiving, via the first channel, and from the first ground station, one or more downlink instructions; selecting a downlink communication channel based on the received one or more downlink instructions; and transmitting information to the first ground station via the selected downlink communication channel.

Systems and methods are provided for increasing or decreasing the transmission speed of a VSAT used in a satellite network. A VSAT may include an ASIC and an FPGA in a transmission block of the VSAT. The ASIC includes an ASIC transmit modulator configured to modulate an input information signal, and circuitry for bypassing at least a portion of the ASIC transmit modulator. The FPGA includes circuitry for receiving a signal bypassing at least a portion of the ASIC transmit modulator, and an FPGA transmit modulator configured to modulate the bypassed signal. In implementations, the system uses the ASIC to burst format an input information signal with a payload burst segment; bypasses a transmit modulator of the ASIC after burst formatting the input information signal with the ASIC; and uses an FPGA to insert additional burst segments into the ASIC burst-formatted signal.

A mesh receiver, computer readable storage medium and method for a very small aperture terminal (VSAT) performing communications in a satellite-based network. The mesh receiver includes a receiver that receives a plurality of TDMA mesh carriers simultaneously in the network in plural channels. The mesh carriers have a transmitted frequency, transmitted gain, and transmitted timing that is unknown to the mesh receiver. The mesh receiver also includes circuitry configured to blindly derive gain, frequency, and timing values from the received mesh carriers, and a demodulator that demodulates the received TDMA mesh carriers and generates demodulated bursts for packets of the communications based on the blindly derived gain, frequency, and timing values.

A ground station computing system for communicating with a satellite is provided, including a processor and associated memory storing instructions that cause the processor to execute a software-defined radio (SDR) program. The SDR program is configured to receive signals from a plurality of satellites and determine a doppler shift signature pattern of one of the satellites. The SDR program is further configured to detect, within the received signals from the plurality of satellites, packet preambles from the one of the plurality of satellites, based on correlations between portions of the received signals and the doppler shift signature pattern.

Synchronizing the local time of beacons. Systems and methods discipline a high-stability local clock of a designated beacon within a geographic region to a network time, and synchronize a local clock of another beacon within the geographic region to the network time.

In one implementation, a communications satellite includes a main antenna system and a communications controller. The main antenna system is configured to send communications to and receive communications from one or more terrestrial terminal devices. The communications controller has a memory storing a plurality of terminal attribute sets, each of which specifies attributes for communicating with a corresponding class of terrestrial terminal devices. The communications controller is configured to receive a terminal class identifier from an active terrestrial terminal device, identify, from among the stored terminal attribute sets, a particular terminal attribute set as corresponding to the terminal class identifier received from the active terrestrial terminal device, and control the communications satellite to communicate with the active terrestrial terminal device according to the attributes for communicating specified in the particular terminal attribute set identified as corresponding to the terminal class identifier received from the active terrestrial terminal device.

A relay side receiving unit (931) receives a relay signal (99), an analog relay unit (932) outputs by analog processing the relay signal (99) whose frequency bandwidth is controlled, and a digital relay unit (933) outputs by digital processing the relay signal (99) whose frequency bandwidth is controlled. A relay side transmitting unit (934) transmits the relay signal (99) output by the analog relay unit (932), the digital relay unit (933). A relay side control unit (935) controls the analog relay unit (932), the digital relay unit (933) in accordance with an analog relay unit control signal (941A), a digital relay unit control signal (941D) indicating a frequency band of the relay signal (99).

A communication system is described. The system includes: at least one gateway able to provide broadband connectivity, a set of ground terminals, and a set of aerial platforms, where at least one aerial platform is able to communicate with at least one gateway using radio frequencies, each aerial platform is able to communicate with ground terminals using radio frequencies, and each aerial platform is able to communicate with each other aerial platform using radio frequencies. An automated method for determining a beam direction for communication among UAVs includes: dividing a space around the UAV into multiple sub-regions, and, iteratively: selecting a sub-region from among the multiple sub-regions; pointing a signal toward the sub-region; and determining whether a signal is received from another UAV, until all sub-regions from among the multiple sub-regions have been selected.

Systems and methods for adapting a timer(s) for a satellite-based radio access network are disclosed. Embodiments of a method performed by a wireless device and corresponding embodiments of a wireless device are disclosed. In some embodiments, a method performed by a wireless device comprises obtaining a value to be used to offset, extend, and/or scale one or more timers related to the satellite-based radio access network relative to values for non-satellite-based radio access networks. The method further comprises utilizing the value to offset a start of one or more timers, extend one or more timers, and/or scale one or more timers and performing one or more actions based on the one or more offset timers, the one or more extended timers, and/or the one or more scaled timers. Embodiments of a method performed by a base station and corresponding embodiments of a base station are also disclosed.

A transmission method includes generating, by a first device, a first authentication code based on first information, a first key, and first data. The first information includes at least one of sending time information or first context information. The method further includes generating, by the first device, a first data packet based on the first authentication code and the first data. The method further includes sending, by the first device, the first data packet, the first device being part of a first transmission system.