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<p>data using a minimum of <a href="page.php?w=radio_spectrum">radio spectrum</a> bandwidth.  OFDM has higher <a href="page.php?w=spectral_efficiency">spectral efficiency</a> and more resistance to <a href="page.php?w=fading">fading</a> than AM or FM.  In OFDM multiple radio carrier waves closely spaced in frequency are transmitted within the radio channel, with each carrier modulated with bits from the incoming <a href="page.php?w=bitstream">bitstream</a> so multiple <a href="page.php?w=binary_digit">bits</a> are being sent simultaneously, in parallel.</p><p>
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