Please use this identifier to cite or link to this item:
http://hdl.handle.net/10071/25001
Author(s): | João Sande Lemos Monteiro, F. A. Ivo Sousa António J. Rodrigues |
Editor: | José M. F. Moura, Dapeng Oliver Wu |
Date: | 2015 |
Title: | Full-duplex relaying in MIMO-OFDM frequency-selective channels with optimal adaptive filtering |
ISBN: | 978-1-4799-7591-4 |
DOI (Digital Object Identifier): | 10.1109/GlobalSIP.2015.7418364 |
Keywords: | Decode-and-forward relay In-band full-duplex Frequency-selective MIMO channel Adaptive filtering Recursive least squares |
Abstract: | In-band full-duplex transmission allows a relay station to theoretically double its spectral efficiency by simultaneously receiving and transmitting in the same frequency band, when compared to the traditional half-duplex or out-of-band full-duplex counterpart. Consequently, the induced self-interference suffered by the relay may reach considerable power levels, which decreases the signal-to-interference-plus-noise ratio (SINR) in a decode-and-forward (DF) relay, leading to a degradation of the relay performance. This paper presents a technique to cope with the problem of self-interference in broadband multiple-input multiple-output (MIMO) relays. The proposed method uses a time-domain cancellation in a DF relay, where a replica of the interfering signal is created with the help of a recursive least squares (RLS) algorithm that estimates the interference frequency-selective channel. Its convergence mean time is shown to be negligible by simulation results, when compared to the length of a typical orthogonal-frequency division multiplexing (OFDM) sequences. Moreover, the bit-error-rate (BER) and the SINR in a OFDM transmission are evaluated, confirming that the proposed method extends significantly the range of self-interference power to which the relay is resilient to, when compared with other mitigation schemes. |
Peerreviewed: | yes |
Access type: | Open Access |
Appears in Collections: | IT-CRI - Comunicações a conferências internacionais |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
conferenceobject_27418.pdf | Versão Aceite | 350,92 kB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.