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A Factor Graph Approach to Digital Self-Interference Mitigation in OFDM Full-Duplex Systems | IEEE Journals & Magazine | IEEE Xplore

A Factor Graph Approach to Digital Self-Interference Mitigation in OFDM Full-Duplex Systems


Abstract:

Digital self-interference cancellation is a major challenge for orthogonal frequency division multiplexing full-duplex transmissions. Therefore, reliable estimation of bo...Show More

Abstract:

Digital self-interference cancellation is a major challenge for orthogonal frequency division multiplexing full-duplex transmissions. Therefore, reliable estimation of both the signal-of-interest and the self-interference channel, becomes the limiting factor in a mobile radio context. In this letter, improved estimation of the time-varying channels is obtained by solving the problem jointly with self-interference cancellation and decoding using a factor graph approach. Taking advantage of the per-subcarrier structure of message-passing, a low-complexity receiver is obtained. Our semianalytical and numerical results show the superiority of the proposed scheme over state-of-the art self-interference cancellation methods under limited pilot overhead.
Published in: IEEE Signal Processing Letters ( Volume: 24, Issue: 3, March 2017)
Page(s): 344 - 348
Date of Publication: 02 February 2017

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