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Noncoherent symbol synchronization techniques

Show simple item record Simon, Marvin 2009-04-08T18:18:12Z 2009-04-08T18:18:12Z 2005-10-17
dc.identifier.citation Military Communications Conference (MILCOM), Atlantic City, New Jersey, October 17-20, 2005. en_US
dc.identifier.clearanceno 05-1242
dc.description.abstract Traditional methods for establishing symbol synchronization (sync) in digital communication receivers assume that carrier sync has already been established, i.e., the problem is addressed at the baseband level assuming that a "perfect" estimate of carrier phase is available. We refer to this approach as coherent symbol sync. Since, for NRZ signaling, a suppressed carrier sync loop such as an I-Q Costas loop includes integrate-and-dump (I&D) filters in its in-phase (1) and quadrature (Q) arms, the traditional approach is to first track the carrier in the absence of symbol sync information, then feed back the symbol sync estimate to these filters, and then iterate between the two to a desirable operating level In this paper, we revisit the symbol sync problem by examining methods for obtaining such sync in the absence of carrier phase information, i.e., so-called noncoherent symbol sync loops. We compare the performance of these loops with that of a well-known coherent symbol sync loop and examine the conditions under which one is preferable over the other. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2005. en_US
dc.subject digital communications en_US
dc.subject coherent symbol sync en_US
dc.subject noncoherent symbol sync loops en_US
dc.title Noncoherent symbol synchronization techniques en_US
dc.type Preprint en_US

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