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<p>without the need for complex equalization filters. Channel <a href="page.php?w=Equalization_%28communications%29">equalization</a> is simplified because OFDM may be viewed as using many slowly modulated <a href="page.php?w=narrowband">narrowband</a> signals rather than one rapidly modulated <a href="page.php?w=wideband">wideband</a> signal. The low symbol rate makes the use of a guard interval between symbols affordable, making it possible to eliminate <a href="page.php?w=intersymbol_interference">intersymbol interference</a> (ISI) and use echoes</p><p>
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