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A more practical scenario is investigated. In this scenario, the available relays are randomly dispersed at various locations, and the relay selection scheme selects the optimal relay location. It can be seen from the figure that the achievable sum rate for a single pair of relays located at the optimum location between the source and the destination is 2.4 bps/Hz. However, when relay selection is performed from six pairs of relays randomly deployed at various locations, the achievable sum rate increases to 3.1 bps/Hz. Similarly, if six pairs of relays are all located around the optimum location, the improvement in the data rate is the same as that achieved by randomly deployed relays .
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IEEE/ICACT20220371 Slide.15
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