Viasat, Inc.

Eric A Fowlie

Fan Mo

Yuri Zelensky

Murat Arabaci

Chase B Nemeth-Neumann

Sameep Dave

One example includes a frame synchronization module. The module includes a search correlator configured to find a first unique word (UW) pattern in a first set of digital sample blocks of a first data frame and a second UW pattern in a second digital sample blocks of a second data frame. The module also includes a buffer configured to store the first and second data frames and to concurrently release the buffered first and second data frames for downstream processing in response to time-aligning the first and second UW patterns of the respective first and second sets of digital sample blocks being aligned to a clock index.

Synchronizing and aligning sample frames received on multi-component signals at a communications receiver

A frame synchronization system and method is disclosed. The system can comprise controller, a search correlator, and a buffer. The controller can be configured to operate on a first stream of first digital sample blocks associated with a first signal and a second stream of second digital sample blocks associated with a second signal. The search correlator can be configured to determine an index of a first unique word (UW) pattern within first searchable digital sample blocks corresponding to the first digital sample blocks and an index of a second UW pattern within second searchable digital sample blocks corresponding to the second digital sample blocks. The buffer can be configured to store the first digital sample blocks and the second digital sample blocks and to release the buffered first and the second digital sample blocks for flow downstream when the stream of first digital sample blocks and the stream of second digital sample blocks are aligned.

Methods, systems, and devices are described for filtering data from an optical signal to compensate for chromatic dispersion in an optical path. Samples of different polarizations are filtered in the frequency domain with a matched filter by time-sharing a conversion module. The conversion module first converts a set of samples to the frequency domain for filtering when in a Fast Fourier Transform (FFT) configuration and then converts the filtered set of samples back to the time domain when in an Inverse FFT (IFFT) configuration. The size of the FFT in the FFT configuration and of the IFFT in the IFFT configuration is the same as the size of the samples being processed by the conversion module to enable both configurations to be based on a set of constant multipliers. Both configurations may be based on a pipelined architecture to sequentially process the samples in an efficient manner.

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Middleburg Heights, OH, United States of America

Eric A Fowlie