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Full-Duplex Relaying with Improper Gaussian Signaling over Nakagami-m Fading Channels. (arXiv:1704.06640v1 [cs.IT])
来源于:arXiv
We study the potential employment of improper Gaussian signaling (IGS) in
full-duplex relaying (FDR) with non-negligible residual self-interference (RSI)
under Nakagami-m fading. IGS is recently shown to outperform traditional proper
Gaussian signaling (PGS) in several interference-limited settings. In this
work, IGS is employed as an attempt to alleviate RSI. We use two performance
metrics, namely, the outage probability and ergodic rate. First, we provide
upper and lower bounds for the system performance in terms of the relay
transmit power and circularity coefficient, a measure of the signal
impropriety. Then, we numerically optimize the relay signal parameters based
only on the channel statistics to improve the system performance. Based on the
analysis, IGS allows FDR to operate even with high RSI. The results show that
IGS can leverage higher power budgets to enhance the performance, meanwhile it
relieves RSI impact via tuning the signal impropriety. Interestingly,
one-dimensional 查看全文>>