METHOD FOR DEMODULATING SIGNALS IN A RETURN LINK OF A SATELLITE SYSTEM CAPABLE OF ENHANCING A TRANSMISSION RATE IN THE RETURN LINK AND A DEMODULATING APPARATUS THEREOF AND A METHOD FOR MODULATING SIGNALS IN THE RETURN LINK AND AN MODULATING APPARATUS THEREOF

摘要

PURPOSE: A method for demodulating signals in a return link of a satellite system and a demodulating apparatus thereof and a method for modulating signals in the return link and a modulating apparatus thereof are provided to check a symbol of a burst signal in a reception terminal by modulating the burst signal in a transmission terminal of a return link in a satellite system.;CONSTITUTION: The symbol timing of burst, which is received through a return link of a satellite system, is estimated. The estimated symbol timing of the received burst is synchronized by reference symbol timing(110). An Oerder & Myer algorithm of a non data-aided method is used to estimate a symbol timing error. A location of timing synchronous burst is synchronized to a reference burst location(150) by using a preamble symbol and a postamble symbol of the timing synchronous burst synchronized by symbol timing(130). A carrier wave of the location synchronous burst is recovered by using a pilot symbol of the location synchronous burst synchronized to the reference burst location.;COPYRIGHT KIPO 2012