Abstract: Various arrangements for performing transmodulation of a forward feeder link are presented. A first data stream and a second data stream can be modulated into a higher-order modulation forward feeder link having a higher-order digital modulation scheme. A satellite can receive the higher-order modulation forward feeder link. The satellite can demodulate the higher-order modulator forward feeder link into a bit stream. This bit stream may then be remodulated and retransmitted as multiple forward user links.

Abstract: A receiver and method for compensating for linear impairments at a receiver including receiving an Rx signal including an asymmetric response of a satellite filter; pre-equalizing the Rx signal with a coefficient; and demodulating, after the pre-equalizing, the Rx signal.

Abstract: Methods and systems for monitoring a communication network using machine-learning techniques are disclosed. In some implementations, a forecasted amount of traffic for a communication network is determined using one or more network traffic forecasting models being configured to generate the forecasted amount of traffic based on data indicating one or more previous amounts of traffic for the communication network. A measure of network health is generated based on a measured amount of traffic and the forecasted amount of traffic. Data indicating one or more characteristics of the communication network is processed using one or more machine learning models to generate a predicted measure of network health for a future time period. An indication of the predicted measure of network health for the future time period is provided.

Abstract: An Encrypted Transport Proxy Backbone Protocol module is configured to set up ET Proxy Backbone connections with another distributed proxy device with each ET Proxy Backbone connection including multiple ET Proxy Backbone channels for transmitting ET proxy packets having different QoS classes. Each ET Proxy Backbone channel includes a separate queue. The ET Proxy Backbone Protocol module is also configured to schedule transmissions of the ET proxy packets from each respective queue; multiplex the ET proxy packets from each respective queue via the associated ET Proxy Backbone channel; perform local recovery of network impairments over the access network and perform congestion control to prevent packets from client devices and web servers from causing network congestion to the access network.

Abstract: Systems and methods for aligning timing of an inroute transmission of a terminal with a gateway are disclosed. A system may include a processor and a memory storing instructions, which when executed by the processor, may cause the processor to perform a random estimation of location pertaining to a time-division multiple access (TDMA) frame boundary of a gateway. Based on an asynchronous scrambled coded multiple access (ASCMA) technique, the system may transmit ASCMA group burst packets including precise timing feedback request for the gateway. The system may receive a feedback from the gateway, in response to the precise timing feedback request. The processor may determine an adjustment for aligning timing of an inroute transmission of the terminal with respect to the TDMA frame boundary of the gateway. The system may apply the adjustment to synchronize the timing of the inroute transmission of the terminal with the gateway.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for improving adaptive satellite communication. In some implementations, a method includes receiving, by a receiver and from a transmitter, code blocks transmitted according to a first set of parameters that comprises one or more of a first modulation used to transmit the code blocks or a first coding used to encode the code blocks for transmission. A number of corrupted code blocks and a number of parity blocks in a series of the code blocks received are determined. The number of corrupted code blocks are compared with the number of parity blocks. A second set of parameters are determined based on the comparison of the number of corrupted code blocks with the number of parity blocks. The second set of parameters are communicated to the transmitter for subsequent transmissions.

Abstract: Systems and methods for estimating the kind of traffic a VPN is carrying and determining which WAN connection to use for VPN network traffic to reduce usage costs while maintaining responsiveness in a VPN router or gateway. A VPN classifier examines VPN packets and estimates the type of traffic they are carrying and selects a policy for upstream or downstream traffic to determine which tunnel or tunnels to send network traffic. Further, policies may be applied to VPN packets as a function of usage knob.

Abstract: A network device for providing configurable reference frequencies in a satellite communication system is disclosed. The network device may be any of a satellite modem, satellite transceiver, or satellite router. The network device may receive information pertaining to a type of an Outdoor Unit (ODU), determine the type of ODU based on the received information, and provide a plurality of configurable reference frequencies based on the type of the Outdoor Unit (ODU) such that the plurality of configurable reference frequencies may be used with different combinations of low noise block converters (LNBs) and block-up converters (BUCs).

Abstract: An Encrypted Transport (ET) proxy module is configured to receive incoming ET proxy packets from an ET proxy backbone module and transmit outgoing ET proxy packets to the ET proxy backbone module. The ET proxy module is also configured to set up an HTTP tunnel with an ET proxy client of the client device or with an ET proxy at a web server for receiving incoming UDP payloads from the client device or web server and transmitting outgoing UDP payloads to the client device or web server. The ET proxy module is also configured to receive prioritization preferences from client devices or web servers pertaining to the UDP payloads indicating preferred quality-of-service (QoS) classes for the UDP payloads, and to schedule transmission of the outgoing UDP payloads via the HTTP tunnel based on QoS classes of the outgoing UPD payloads.

Abstract: An Encrypted Transport Proxy Backbone Protocol module is configured to set up ET Proxy Backbone connections with another distributed proxy device with each ET Proxy Backbone connection including multiple ET Proxy Backbone channels for transmitting ET proxy packets having different QoS classes. Each ET Proxy Backbone channel includes a separate queue. The ET Proxy Backbone Protocol module is also configured to schedule transmissions of the ET proxy packets from each respective queue; multiplex the ET proxy packets from each respective queue via the associated ET Proxy Backbone channel; perform local recovery of network impairments over the access network and perform congestion control to prevent packets from client devices and web servers from causing network congestion to the access network.

Abstract: Systems, methods, and apparatus, including computer-readable media, for enhanced network communication using multiple network connections. In some implementations, a networking apparatus concurrently maintains connectivity to a network through each of multiple network transports. The networking apparatus receives one or more packets to be transmitted over the network and classifies the one or more packets to determine a class of service. The networking apparatus selects one of the multiple network transports to transmit the one or more packets based on (i) the class of service for the one or more packets and (ii) measures of expected latency for transmission of the one or more packets over the respective multiple network transports. The networking apparatus transmits the one or more packets using the selected network transport.

Abstract: Systems and methods for facilitating an inroute transmission of data are disclosed. A system may include a processor and a memory storing instructions, which when executed by the processor, may cause the processor to receive information pertaining to a bandwidth capacity of a communication channel for an inroute transmission of data from a terminal of a plurality of terminals. The processor may determine, based on the received information and using an asynchronous scrambled coded multiple access (ASCMA) technique, a bandwidth allocation for the inroute transmission of data. The inroute to transmission may be in a form of ASCMA transmission of one or more encapsulated group burst packets.

Abstract: Embodiments disclosed herein relate generally to techniques for mitigating blockages associated with satellite systems. More specifically, techniques disclosed herein, describe solutions for minimizing service interruption during satellite handover. One or more blockages associated with one or more user terminals that connect to a satellite system may be determined by various means. Utilizing those blockages, handover times for the one or more user terminals may be determined such that service interrupts may be minimized.

Abstract: An apparatus and method for mitigating polarization mismatch in reflector antenna systems. A feed unit is configured to determine a polarization mismatch between a first polarization associated with a first wave and a second polarization associated with a reflector unit. The feed unit pre-distorts the first wave to achieve a compensated polarization for reducing and/or eliminating a polarization mismatch. The pre-distorted first wave having the compensated polarization is used to illuminate the reflector unit. A re-radiated wave is reflected by the reflector unit. Furthermore, the level of the re-radiated wave is increased as a result of the pre-distortion.

Abstract: Systems and methods are provided for enabling reliable signaling in the presence of strong phase noise and frequency offset. To this end, a method is provided comprising receiving, at a receiver, a communication signal, including data, from a transmitter via a communication channel, and jointly tracking and jointly correcting phase noise errors and frequency errors in the communication signal with a joint detector using an iterative feedback correction process between an output decoder of the receiver and the joint detector.

Abstract: A system and method are disclosed for estimating the location of a satellite terminal. The terminal is selected from among a plurality of terminals, and one or more position estimates are generated for a satellite which provides service to the terminal. The position estimated can be generated, for example, by performing a first one or more iterative grid searches over a plurality of potential position estimates for the satellite. A location estimate is subsequently generated for the terminal by performing a second one or more iterative grid searches over a plurality of potential location estimates for the terminal.

Abstract: Techniques described herein provide phase and amplitude calibration of phased array antennas. In an N-by-M phased array having N*M channels, embodiments use aggregated measurements over multiple concurrently active channels to improve signal-to-leakage performance, while also using sequences of exclusion groups to yield an individualized calibration value for each channel (i.e., N*M individualized calibration values). For example, a J×K channel group of the array is selected in each of a sequence of measurement frames based on a calibration schema. Over J*K measurement sub-frames, a set of J*K aggregate measurements is obtained, each with different subsets of the channel group activated and excluded from the measurement. The aggregate calibration measurements can be used to compute J*K individualized calibration values, each for a channel of the channel group. In some implementations, each calibration value is computed as a complex value including both amplitude and phase calibrations information.

Abstract: A system for a Rydberg atom based quantum communications transceiver is provided. The system may include a laser source for generating a photon. The system may also include one or more optical elements to create a pair of entangled photons from a generated photon, wherein the pair of entangled photons comprises a first entangled photon and a second entangled photon. The system may further include a radio-frequency (RF) based element to generate a quantum communication path from the pair of entangled photons by creating two Rydberg atom vapor cells (RAVC) that are entangled such that entangled photons may transfer or communicate their entangled state to Rydberg atoms within the Rydberg atom vapor cells (RAVCs) and form at least one entangled link with the other, the communication path comprising the least one entangled link. The system may also include one or more photon receivers, which may use at least one translation technique, to translate entangled state of each of the Rydberg atom vapor cells (RAVC).

Abstract: Systems and methods for estimating the kind of traffic a VPN is carrying and determining which WAN connection to use for VPN network traffic to reduce usage costs while maintaining responsiveness in a VPN router or gateway. A VPN classifier examines VPN packets and estimates the type of traffic they are carrying and selects a policy for upstream or downstream traffic to determine which tunnel or tunnels to send network traffic. Further, policies may be applied to VPN packets as a function of usage knob.

Abstract: A method for communicating with a legacy terminal supporting a legacy air interface and a new terminal supporting a next generation air interface including: assigning a same carrier to the legacy terminal and the new terminal; receiving a terminal identifier and an optional payload for transmission at a MAC/RLC layer; determining if the terminal identifier is associated with the legacy terminal or the new terminal; composing, based on the determining, a burst header; formatting, a burst including the burst header and the optional payload; and transmitting the burst. In the method, the burst header is set to one of the one or more valid burst headers when the burst is associated with the legacy terminal, and the burst header is set to one of the one or more undefined burst headers when the burst is associated with the new terminal.