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Compared with the conventional AF-based single-relay cooperative networks, there is nearly double spectrum efficiency in the AF-based two-path relay cooperative networks. However, there are few channel estimation methods for that. In this paper, we propose this channel estimation scheme. Firstly, we find the necessary channel state information (CSI) based on the FIC (full interference cancelation)...
In this paper, we study the pilot power allocation in the amplify-and-forward (AF) relay system based on orthogonal frequency division multiplexing (OFDM) modulation. By giving the closed-form expression of the outage probability, we theoretically derive the optimized pilot power allocation. Then we verify our results through simulation. At last, the numerical results match the analytical results...
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