Hughes Network Systems, LLC

Other

John Alfred Schmid

Yezdi F Antia

Jack Lundstedt

Guy Bryan Montgomery

Bahman Salamat

Mustafa Eroz

George Eapen

Yeqing Tang

Frank Li

Brian Smith

Doug Ricker

A satellite terminal and a machine-implemented method are provided for encoding a burst header of a burst for transmission on an inroute. One component of a group of satellite terminal components consisting of an ASIC, a FPGA, and a DSP, generates a burst header having five information bits encoded therein. The five information bits may be encoded using a Reed-Muller code, a (32, 5) block code or a convolutional code having a code rate of either 1/5 or 1/10. The five information bits may represent one or more of a modulation type for a payload of the burst, a code rate for encoding the payload, a code type, and a spreading factor for spreading the payload during transmission. A satellite gateway and a machine-implemented method are also provided for decoding a burst header of a burst received on an inroute as described above.

Inroute burst header in a VSAT system

Power spectral density in an aeronautical satellite communication system is controlled through the use of adaptive inroute selection and spreading. Once a communication session has been established between the aircraft and the satellite, environmental conditions and aircraft conditions are monitored to detect events capable of affecting transmit/receive properties during the communication session. A maximum allowable transmission output is determined based, at least in part, on governmental regulations and the conditions being monitored. One or more transmit parameters are adjusted during the time interval in order to maintain transmission output power of the aircraft terminal below the maximum allowable transmission output power.

Power spectral density control using AIS and spreading in an aeronautical SATCOM terminal using a low profile antenna

A TCP/IP packet decoder fetches, from a packet received via a satellite communication system, IP version information, which is provided to version comparators. When a version comparator indicates a match, protocol information is provided to a TCP comparator. If the TCP comparator determines that the packet is a TCP data packet, a flag is raised causing generation of a TCP acknowledgment for transmission to a source device. In another embodiment, a layer 3 switch or router includes a TCP hardware filter to determine whether the received packet is a TCP data packet, thereby causing the TCP data packet to be mirrored for transmission to a modem. In a third embodiment, a TCP hardware filter, provides an indication to a layer 2 switch when a TCP data packet is received causing the TCP data packet to be mirrored for transmission to a modem, which generates and transmits a TCP acknowledgment.

Hardware TCP accelerator

Power spectral density in an aeronautical satellite communication system is controlled through the use of adaptive inroute selection and spreading. Once a communication session has been established between the aircraft and the satellite, environmental conditions and aircraft conditions are monitored to detect events capable of affecting transmit/receive properties during the communication session. A maximum allowable transmission output is determined based, at least in part, on governmental regulations and the conditions being monitored. One or more transmit parameters are adjusted in order to maintain transmission output power of the aircraft terminal below the maximum allowable transmission output power.

It is determined, e.g., in a communications terminal, that a test triggering event has occurred. A test is initiated based on the determination that the test triggering event has occurred. One or more transmissions are transmitted at one or more respective specified power levels. Measurement data is received from a remote measurement unit indicating respective received power levels of the one or more transmissions by the remote measurement unit. Based on the measurement data, a maximum transmit power level is determined.

Communications terminal with linear operating point determination

A mobile terminal for satellite communications receives communication, e.g., from a gateway via a satellite link. A frequency lock loop unit locks to the carrier frequency of the received communication. The mobile terminal includes a global positioning system for receiving global positioning data. The mobile terminal determines the Doppler frequency shift of the received communications based on the global positioning data. The mobile terminal generates a reference clock for return transmissions based on the frequency of the frequency lock loop, corrected for the Doppler shift. A correction factor of two times the determined Doppler frequency shift is used, to compensate for both a forward and return transmission link.

Mobile terminal with frequency lock loop

A small vehicle detector for determining a size of a vehicle entering a particular area and assigning a rate of charge based on the determined size of vehicle including an entrance for a vehicle to enter the area. The small vehicle detector further includes a vehicle size detector system for determining size of the vehicle. The small vehicle detector also includes a ticket dispenser for dispensing a ticket with the assigned rate of charge based on the size determined by the vehicle size detector.

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Darnestown, MD, United States of America

John Alfred Schmid