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Summary: A Computationally Intelligent Fast Acquisition Algorithm for Deep Space
Optical Communications
Kourosh Rahnamai£
, Payman Arabshahi, and Tsun-Yee Yan
Jet Propulsion Laboratory/California Institute of Technology
4800 Oak Grove Drive, MS 238-343
Pasadena, CA 91109 USA
rahnamai,payman,yan @dsp.jpl.nasa.gov
Abstract-- An essential requirement in the design and imple-
mentation of optical receivers for deep space communications is
the development of a low-complexity, fast, and intelligent frame
and symbol synchronization technique. In this paper we present
the results of a sub-sequence pattern matching technique that
detects and isolates the data frame boundaries based on partially
received frames. This is in contrast to the traditional correlation
based methods which are not as computationally efficient, and
require full reception of the acquisition sequence prior to syn-
chronization. This technique allows fast convergence and de-
tection of the boundaries with as low as 2-6 bytes of received
synchronization word. In addition, a confirmation method is
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