1 research outputs found
Partial-Duplex Amplify-and-Forward Relaying: Spectral Efficiency Analysis under Self-Interference
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-duplex and full-duplex as
particular cases. By viewing the partial-duplex relay as a bandwidth-preserving
Linear Periodic Time-Varying system, an analysis of the spectral efficiency in
the presence of 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.Comment: Submitted to IEEE Transactions on Wireless Communication