METHOD AND SYSTEM FOR DOPPLER ESTIMATION

A mobile device ( 101 ) and method ( 200 ) for estimating a Doppler frequency is provided. The method can include receiving ( 202 ) a communication signal containing preambles ( 120 ) and pilots ( 125 ), identifying pilot locations ( 203 ), computing ( 204 ) an autocorrelation from the preambles and...

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Bibliographische Detailangaben
Hauptverfasser:	RUDOWICZ MICHAEL J, RAINBOLT BRADLEY J
Format:	Patent
Sprache:	eng
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY JAMMING OF COMMUNICATION SECRET COMMUNICATION TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Beschreibung
Zusammenfassung:	A mobile device ( 101 ) and method ( 200 ) for estimating a Doppler frequency is provided. The method can include receiving ( 202 ) a communication signal containing preambles ( 120 ) and pilots ( 125 ), identifying pilot locations ( 203 ), computing ( 204 ) an autocorrelation from the preambles and pilots, identifying ( 205 ) a zero-crossing of the autocorrelation, and calculating ( 206 ) the Doppler frequency from the zero-crossing. The autocorrelation uses a forward ( 410 ) and backward ( 420 ) computation of a preamble fading estimate and a pilot fading estimate that is averaged over a plurality of frames that is independent of pilot structure.