Ali Y. Al-Zahrani
Department of Electrical and Computer Engineering
University of Jeddah
Jeddah 21589, Saudi Arabia
ABSTRACT
The global bandwidth scarcity and the ever-growing demand for fast wireless services
have motivated the quest for new techniques that enhance the spectral efficiency
(SE) of wireless systems. Most conventional SE increasing methods (e.g., adaptive
modulation and coding) have already been exhausted. Single-channel full-duplex
(SCFD) communication is a new attractive approach in which each node may simultaneously
receive and transmit over the same frequency channel, and thus, it has
the potential to double the current SE figures. In this paper, we derive a model for
the signal-to-interference-plus-noise ratio (SINR) in a SCFD-based cellular system
with imperfect self-interference cancellation. Furthermore, given a set of uplink and
downlink quality of service requirements, we answer the following two fundamental
questions. First, is this set achievable in the SCFD-based cellular system? Second,
if the given set is achievable, what is the optimal achieving policy? To that end, we
provide a unified model for the SCFD-based cellular system, and give insights in the
matrix of interference channel gains. Simulation results suggest that depending on
the locations of the users, a combination of full-duplex and half-duplex modes over
the whole network is more favourable policy.
KEYWORDS
Full-duplex, cellular network, self-interference, inter-cell interference, resource allocations and interference cancellation
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