Open AccessNovel Digital Cancelation Method in Presence of Harmonic Self‐Interference
Author(s) -
Ju Hyungsik,
Gwak Donghyuk,
Lee Yuro,
Kim TaeJoong
Publication year - 2017
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.17.0116.0498
Subject(s) - orthogonal frequency division multiplexing , computer science , transceiver , interference (communication) , algorithm , electronic engineering , channel (broadcasting) , spectral efficiency , fast fourier transform , discrete fourier transform (general) , telecommunications , mathematics , fourier transform , engineering , wireless , short time fourier transform , fourier analysis , mathematical analysis
In‐band full‐duplex (IFD) communication has recently attracted a great deal of interest because it potentially provides a two‐fold spectral efficiency increase over half‐duplex communications. In this paper, we propose a novel digital self‐interference cancelation (DSIC) algorithm for an IFD communication system in which two nodes exchange orthogonal frequency‐division multiplexing (OFDM) symbols. The proposed DSIC algorithm is based on the least‐squares estimation of a self‐interference (SI) channel with block processing of multiple OFDM symbols, in order to eliminate the fundamental and harmonic components of SI induced through the practical radio frequency devices of an IFD transceiver. In addition, the proposed DSIC algorithm adopts discrete Fourier transform processing of the estimated SI channel to further enhance its cancelation performance. We provide a minimum number of training symbols to estimate the SI channel effectively. The evaluation results show that our proposed DSIC algorithm outperforms a conventional algorithm.