Abstract
This letter analyses capacity of a multichannel relay system with subchannel pairing (SP) over Rayleigh fading channels. We aim to derive unified capacity expressions for three SP cases, i.e., ordered subchannel pairing (OSP), reversely ordered subchannel pairing (ROSP) and non-subchannel pairing (NSP). In particular, we quantify higher-order statistics of the capacity in decode-and-forward (DF) protocol associated with three power allocation schemes: uniform power allocation, water-filling power assignment and power adaptation with truncated channel inversion policy. While in amplify-and-forward (AF) protocol, we only concern the ergodic capacity for uniform power allocation due to mathematical tractability. Finally, theoretical formulas well coincide with simulation results.
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