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What is maximal ratio combining (MRC)?

April 26, 2017combining maximal MRC ratio

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What is maximal ratio combining (MRC)?

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MRC allows for combining diversity (as opposed to the switching diversity used in traditional 802.11a/b/g systems) and is principally used in schemes such as 2 x 3 MIMO, where the number of receive antennas exceeds the number of transmit antennas. The number of spatial streams is limited to the smaller of the number of active transmit antennas and the number of active receive antennas. If there are more receive antennas than transmit antennas, then the extra receive antennas can be employed to provide MRC diversity.