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This letter proposes three smart relaying strategies, including power allocation, continuous power control, and discrete power control strategies, to mitigate the error propagation problem for single-relay decode-and-forward cooperative networks using selection combining at the destination. By fully exploiting the channel state information at the relay, these relaying strategies can optimize transmit...
In this paper, we consider constellation design for decode-and-forward relay networks with adaptive modulation, which improves the diversity combining gain by averaging over all transmission branches the bit reliability variations brought by multilevel modulation formats. A novel bit-error-rate expression for maximal ratio combining of M-ary Quadrature Amplitude Modulation (M-QAM) signals with different...
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