Diversity scheme

<p>In <a href="/facts/Telecommunications/vxoj1cxR">telecommunications</a>, a diversity scheme refers to a method for improving the reliability of a message signal by using two or more <a href="/facts/Channel_(communications)/MtlxEShV">communication channels</a> with different characteristics. Diversity is mainly used in <a href="/facts/Radio_communication/XFr909M2">radio communication</a> and is a common technique for combatting <a href="/facts/Fading/RsDwBbdz">fading</a> and <a href="/facts/Co-channel_interference/I95JpU6Y">co-channel interference</a> and avoiding <a href="/facts/Error_burst/UXkhCd2D">error bursts</a>. It is based on the fact that individual channels experience fades and interference at different, random times, i.e., they are at least partly <a href="/facts/Independence_(probability_theory)/NUzQtnUL">independent</a>. Multiple versions of the same signal may be transmitted and/or received and combined in the receiver. Alternatively, a redundant <a href="/facts/Forward_error_correction/cLUTUJrA">forward error correction</a> code may be added and different parts of the message transmitted over different channels. Diversity techniques may exploit the <a href="/facts/Multipath_propagation/dJFXvAbW">multipath propagation</a>, resulting in a <a href="/facts/Diversity_gain/ga5PFjW9">diversity gain</a>, often measured in <a href="/facts/Decibels/0LyxAPXh">decibels</a>.
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Diversity scheme open-in-new

Diversity scheme