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Orthogonal frequency-division multiplexing
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==== SDARS ==== The ground segments of the [[Digital Audio Radio Service]] (SDARS) systems used by [[XM Satellite Radio]] and [[Sirius Satellite Radio]] are transmitted using Coded OFDM (COFDM).<ref>{{cite web |website=EE Times |author=Junko Yoshida |date=June 28, 2001 |url=https://www.eetimes.com/agere-gets-sirius-about-satellite-radio-design/ |title=Agere gets Sirius about satellite radio design}}</ref> The word "coded" comes from the use of [[forward error correction]] (FEC).<ref name=cobas />
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