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Outage Probability of Full-duplex Systems in Multi-spectrum Environments

Authors:
Jaeyeong Choi
Seunglae Kam
Dongkyu Kim
Daesik Hong

Keywords: bi-directional full duplex; multi-spectrum environment; spectrum selection

Abstract:
The goal of this paper is to investigate outage performance in a multi-spectral bi-directional full-duplex system (M-BFD). The system considered is two-way communication between two nodes equipped with a single shared antenna. Because full-duplex transmission is being employed, the required SNR associated with the target rate at each node for BFD is smaller than that for a bi-directional half-duplex system (BHD). In a single spectrum environment, therefore, BFD outperforms BHD in terms of outage probability. From a practical perspective, we investigate whether BFD remains advantageous over BHD in a multi-spectrum environment. We investigate the optimal spectrum selection strategy in terms of outage probability for M-BFD. The outage probability is derived as a closed-form expression under this selection strategy. The results show that the diversity orders for M-BFD and multi-spectral BHD (M-BHD) are identical. In the high signal-to-noise ratio (SNR) range, furthermore, the SNR difference between the outage curves for M-BFD and for M-BHD is shown to be inversely proportional to the number of available spectra, but in proportional to the target data rate.

Pages: 65 to 69

Copyright: Copyright (c) IARIA, 2014

Publication date: July 20, 2014

Published in: conference

ISSN: 2308-3484

ISBN: 978-1-61208-365-0

Location: Paris, France

Dates: from July 20, 2014 to July 24, 2014