Movable Antenna-Enabled Co-Frequency Co-Time Full-Duplex Wireless Communication
CoRR(2024)
Abstract
Movable antenna (MA) provides an innovative way to arrange antennas that can
contribute to improved signal quality and more effective interference
management. This method is especially beneficial for co-frequency co-time
full-duplex (CCFD) wireless communication, which struggles with
self-interference (SI) that usually overpowers the desired incoming signals. By
dynamically repositioning transmit/receive antennas, we can mitigate the SI and
enhance the reception of incoming signals. Thus, this paper proposes a novel
MA-enabled point-to-point CCFD system and formulates the minimum achievable
rate of two CCFD terminals. To maximize the minimum achievable rate and
determine the near-optimal positions of the MAs, we introduce a solution based
on projected particle swarm optimization (PPSO), which can circumvent common
suboptimal positioning issues. Moreover, numerical results reveal that the PPSO
method leads to a better performance compared to the conventional alternating
position optimization (APO). The results also demonstrate that an MA-enabled
CCFD system outperforms the one using fixed-position antennas (FPAs).
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