Tuesday, August 9, 2011

Selection Diversity

What is Selection Diversity?
consider a scenario where we have a single antenna for transmission and multiple antennas at the receiver (as shown in the figure below).
Figure: Receive diversity in a wireless link
At the receiver we have now N copies of the same transmitted symbol. Which then poses the problem – how to effectively combine them to reliably recover the data.
Selection diversity approach is one way out – With selection diversity, the receiver selects the antenna with the highest received signal power and ignore observations from the other antennas. The chosen receive antenna is one which gives max signal power.

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