Abstract
We investigate outage performance of fixed-gain and variable-gain amplify-and-forward (AF) full-duplex (FD) relaying systems under residual loop-interference (LI) in non-identical Nakagami-m fading channels. New exact outage probability expressions are derived analytically in a single-integral form by using the cumulative distribution function approach. Moreover, tight lower-bound and asymptotic outage probability expressions are derived in closed-form for the evaluated systems. It is shown that the fixed-gain AF-FD relaying outperforms the variable-gain AF-FD relaying when LI power and/or signal-to-noise ratio increase. The analytical results are verified by Monte-Carlo simulations.
Highlights
Full-Duplex (FD) communication allows receiving and transmitting the signal at the same time interval using the same frequency band, it improves the spectral efficiency and reduces end-to-end delay with respect to the conventional half-duplex communication [1]
6 Conclusions New exact outage probability expressions for the fixedgain and variable-gain AF-FD relaying systems were presented over non-identical Nakagami-m fading channels
The outage probabilities were obtained from cumulative distribution function (CDF) of the end-to-end signal-to-interference-plus-noise ratio (SINR) at the destination and verified through Monte-Carlo simulations
Summary
Full-Duplex (FD) communication allows receiving and transmitting the signal at the same time interval using the same frequency band, it improves the spectral efficiency and reduces end-to-end delay with respect to the conventional half-duplex communication [1]. The outage probability of the variable-gain AF-FD relaying system with direct link is derived for Rayleigh fading channels in [13] under processing delay and residual LI. In [14], optimal PA problem based on statistical and instantaneous channel state information for the variable-gain AF-FD relaying system with direct link is investigated for Rayleigh fading under total source and relay power constraint. In [21], the outage performance of the fixed-gain AF-FD relaying is investigated and compared with the variable-gain AF-FD relaying over Rayleigh fading channels where the exact outage probability expression is obtained in a singleintegral. We derive exact outage probability expressions for both fixed-gain and variable-gain dualhop AF-FD relaying where all channels are modeled as Nakagami-m fading channel including the residual LI channel. AF-FD systems similar to [8] and [21]
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