etalement spectre v4
etalement spectre v4
etalement spectre v4
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I-1. Rappels de transmission Modulation QPSK à 2porteusesb(t)h(t)â ka kb kCNAI(t)CNA Q(t) osc.90°e RF(t)s RF(t)osc.-90°h(t)^b kCITI - Dept Télécoms 3