Full-duplex communications are potential candidate for increasing the spectral efficiency for 5G mobile systems and beyond, which can transmit and receive simultaneously on the same carrier frequency. The key challenge is the self-interference (SI) caused by the coupling between the transmitter (TX) and its own receiver (RX). This paper proposes a new type of SI canceller based on the channel estimation between TX and its own RX through the use of a specific demodulation reference signal (DMRS) which is special type of physical layer signal. In this paper, we first show the configuration of the proposed SI canceller using the DMRS. Then, we demonstrate the BER performance of OFDM-based QPSK and QAM signals under static and Rician fading channels for SI, using link-level simulations. The simulation results indicate that the proposed SI canceller can sufficiently improve the BERs for OFDM-based QPSK and QAM signals.
Proposal of Self-Interference Canceller Using DMRS for Full Duplex Mobile Communications
2023-06-01
1204648 byte
Conference paper
Electronic Resource
English
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