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Analog Cancellation for Full-Duplex Wireless in Multipath Self-Interference Channels
Jong-Ho LEE Ji-won CHOI Jae-Hoon JUNG Seong-Cheol KIM Yong-Hwa KIM
IEICE TRANSACTIONS on Communications
Publication Date: 2015/04/01
Online ISSN: 1745-1345
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
full-duplex, interference cancellation, multipath, orthogonal frequency-division multiplexing (OFDM),
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In this paper, we propose an analog cancellation scheme for multipath self-interference channels in full-duplex wireless orthogonal frequency-division multiplexing (OFDM) systems. The conventional approaches emulate the radio-frequency (RF) self-interference signals by passing the RF transmit signals through delay lines and programmable attenuators. By contrast, our proposed scheme computes the phase-rotated and weighted versions of the baseband transmit signals in the baseband domain, which are simply upconverted to obtain the emulated RF self-interference signals. Numerical results are presented to verify the suppression performance of the proposed scheme.