Maximal Ratio Combining (MRC)
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Maximal Ratio Combining (MRC)
- Maximal ratio combining (MRC) is a type of receive diversity technique where multiple received signals are combined, thus improving sensitivity.
- MRC algorithms are used to combine multiple received signals by looking at each unique signal and optimally combining the signals in a method that is additive as opposed to destructive.
- MIMO systems using MRC will effectively raise the SNR level of the received signal.
- MRC is useful when a non-MIMO radio transmits to a MIMO receiver and multipath occurs.
- The MRC algorithm focuses on the signal with the highest SNR level; however, it may still combine information from the noisier signals. The end result is that less data corruption occurs because a better estimate of the original data has been reconstructed.
- MRC uses a receive-combining function that assesses the phase and SNR of each incoming signal. Each received signal is phase-shifted so that they can be combined. The amplitude of the incoming signals is also modified to focus on the signal with the best SNR.
Reference:
Coleman, David D.,Westcott, David A. CWNA: Certified Wireless Network Administrator Official Study Guide: Exam CWNA-106 Wiley.
Coleman, David D.,Westcott, David A. CWNA: Certified Wireless Network Administrator Official Study Guide: Exam CWNA-106 Wiley.
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