Symbol-Level Selective Full-Duplex Relaying with Power and Location Optimization

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Abstract

In this paper, a symbol-level selective transmission
for full-duplex (FD) relaying networks is proposed to mitigate
error propagation effects and improve system spectral efficiency.
The idea is to allow the FD relay node to predict the correctly
decoded symbols of each frame, based on the generalized square
deviation method, and discard the erroneously decoded symbols,
resulting in fewer errors being forwarded to the destination node.
Using the capability for simultaneous transmission and reception
at the FD relay node, our proposed strategy can improve the
transmission efficiency without extra cost of signalling overhead.
In addition, targeting on the derived expression for outage probability,
we compare it with half-duplex (HD) relaying case, and
provide the transmission power and relay location optimization
strategy to further enhance system performances. The results
show that our proposed scheme outperforms the classic relaying
protocols, such as cyclic redundancy check based selective
decode-and-forward (S-DF) relaying and threshold based SDF
relaying in terms of outage probability and bit-error-rate.
Moreover, the performances with optimal power allocation are
better than those with equal power allocation, especially when
the FD relay node encounters strong self-interference and/or it
is close to the destination node.
Original languageEnglish
Article number8374826
Pages (from-to)5097-5111
Number of pages15
JournalIEEE TRANSACTIONS ON COMMUNICATIONS
Volume66
Issue number11
Publication statusAccepted/In press - 28 May 2018

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