Full-Duplex Communication – Simultaneous Transmit/Receive Capability
DOI:
https://doi.org/10.63282/3117-5481/AIJCST-V6I2P102Keywords:
Full-duplex wireless communication, Simultaneous transmit and receive, Self-interference cancellation, Spectral efficiency, Latency reduction, Analog and digital cancellation, Passive suppression techniquesAbstract
Full-duplex (FD) wireless communication defined as the ability of a transceiver to transmit and receive simultaneously on the same frequency band has emerged as a promising technique for doubling spectral efficiency and reducing latency in next-generation networks (Sabharwal et al., 2014). Despite its theoretical advantages, practical implementation remains constrained by the challenge of suppressing self-interference (SI), which can exceed the power of the desired signal by over 100 dB (Duarte & Sabharwal, 2010). Recent prototype demonstrations have achieved over 110 dB of SI cancellation through a combination of passive suppression, analog cancellation, and digital signal processing (Bharadia et al., 2013), yet wideband, mobile, and power-efficient FD systems still face limitations caused by nonlinearities and hardware impairments (Riihonen et al., 2020). Advances in adaptive filtering, machine learning-based cancellation, and MIMO-assisted spatial suppression have further improved FD performance, positioning the technology as a key enabler for 5G/6G small cells, intelligent IoT devices, and ultra-dense networks (Ahmed et al., 2024). This paper evaluates the architectural components, cancellation techniques, and emerging research directions of full-duplex communication, highlighting the remaining gaps and the potential for achieving robust real-world FD deployment
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