METHOD AND APPARATUS FOR OBTAINING INITIAL CARRIER AND SYMBOL PHASE ESTIMATES FOR USE IN SYNCHRONIZING TRANSMITTED DATA

METHOD AND APPARATUS FOR OBTAINING INITIAL CARRIER AND SYMBOL PHASE ESTIMATES FOR USE IN SYNCHRONIZING TRANSMITTED DATA

A method and apparatus for determining initial carrier and symbol phase estimates in a burst mode digital communication system are described. In-phase and quadrature sample of a BPSK preamble are sampled to obtain correlation values. Next, sum and differences of the correlation values are obtained....

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: SAYEGH, SOHEIL, I
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Beschreibung
Zusammenfassung:A method and apparatus for determining initial carrier and symbol phase estimates in a burst mode digital communication system are described. In-phase and quadrature sample of a BPSK preamble are sampled to obtain correlation values. Next, sum and differences of the correlation values are obtained. Then the initial carrier phase estimate (THETAHAT) and the initial symbol phase estimate (TAUHAT) are obtained through application of an algorithm. The apparatus that implements the method consists of adders, inverters, arc tangent look-up tables and divide by 2 logic units.