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Partial-Duplex Amplify-and-Forward Relaying: Spectral Efficiency Analysis Under Self-Interference
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DOI：10.1109/TWC.2019.2902390.png)
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Abstract
En 中文
We propose a novel mode of operation for amplify-and-forward relays in which the spectra of the relay input and output signals partially overlap. This partial-duplex relaying mode encompasses half- and full-duplex as particular cases. By viewing the partial-duplex relay as a bandwidth-preserving linear periodically time-varying system, a spectral efficiency analysis under self-interference is developed. In contrast with previous works, self-interference is regarded as a useful information-bearing component rather than simply assimilated to noise. This approach reveals that previous results regarding the impact of self-interference on (full-duplex) relay performance are overly pessimistic. Based on a frequency-domain interpretation of the effect of self-interference, a number of suboptimal decoding architectures at the destination node are also discussed. It is found that the partial-duplex relaying mode may provide an attractive tradeoff between spectral efficiency and receiver complexity.
Keywords:
Partial-duplex
full-duplex
half-duplex
amplify-and-forward
self-interference
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