Hughes Network Systems, LLC

Brandon Lasher

Sri Bhat

Bala Subramaniam

Liming Qin

Zengquan Fan

Seokho Kim

Kish Jadhav

Techniques are described for demodulating burst communications, such as for demodulating satellite beam-hopping communications in a demodulator of a very small aperture terminal (VSAT) satellite receiver. The demodulator includes a front-end and a sample/symbol domain processor. The front-end is configured to selectively operate in either of an adaptive mode or a freeze mode. During demodulation, the sample/symbol domain processor detects start of superframe (SOSF) and end of superframe (EOSF) locations to determine where each dwell time and non-dwell time begins and ends. During at least a portion or each dwell time, the front-end is set to operate in adaptive mode, in which the front-end uses feedback control from the sample/symbol domain processor to continuously adapt to timing and frequency of the received burst transmission. During at least the duration of each non-dwell time, the front-end is set to operate in freeze mode, in which adaptation of the front-end is frozen.

VSAT demodulator architecture for beam hopping satellite systems

A satellite terminal comprises a processor and a memory. The memory stores instructions executable by the processor to determine a frequency spectrum distribution for a wireless communication signal received from an antenna, to input the determined frequency spectrum distribution of the received wireless communication signal to a machine learning program trained to identify one or more satellite communication carriers in a frequency spectrum distribution, to receive a list of one or more satellite communication carriers from the trained machine learning program, and to lock the satellite terminal to one of the carriers included in the list of one or more satellite communication carriers.

Carrier acquisition in satellite communications

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for channel bonding in an adaptive coding and modulation mode. In some implementations, a system receives packets of a data stream for transmission in a satellite communications system. The system determines a modulation and coding arrangement for the received packets. The system generates code blocks that include data from the packets of the data stream. The system assigns the generated code blocks for transmission on different carriers. One or more of the different carriers is operated in an adaptive coding and modulation mode to support multiple modulation and coding arrangements within a single carrier. The system transmits the code blocks on the different carriers using the determined one or more modulation and coding arrangements.

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Frederick, MD, United States of America

Brandon Lasher