Recent Advances in Antenna Design and Interference Cancellation Algorithms for In-Band Full Duplex Relays

被引：218

作者：

Heino, Mikko ^{[1
]}

Korpi, Dani ^{[5
]}

Huusari, Timo ^{[5
]}

Antonio-Rodriguez, Emilio ^{[1
]}

Venkatasubramanian, Sathya ^{[2
]}

Riihonen, Taneli ^{[3
]}

Anttila, Lauri ^{[5
]}

Icheln, Clemens ^{[2
]}

Haneda, Katsuyuki ^{[4
]}

Wichman, Risto ^{[3
]}

Valkama, Mikko ^{[5
]}

机构：

[1] Aalto Univ, Espoo, Finland

[2] Aalto Univ, Dept Radio Sci & Engn, Sch Elect Engn, Espoo, Finland

[3] Aalto Univ, Dept Signal Proc & Acoust, Sch Elect Engn, Espoo, Finland

[4] Aalto Univ, Sch Elect Engn, Espoo, Finland

[5] Tampere Univ Technol, Dept Elect & Commun Engn, FIN-33101 Tampere, Finland

来源：

IEEE COMMUNICATIONS MAGAZINE | 2015年 / 53卷 / 05期

基金：

芬兰科学院;

关键词：

Spectrum efficiency - Antennas;

D O I：

10.1109/MCOM.2015.7105647

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In-band full-duplex relays transmit and receive simultaneously at the same center frequency, hence offering enhanced spectral efficiency for relay deployment. In order to deploy such full-duplex relays, it is necessary to efficiently mitigate the inherent self-interference stemming from the strong transmit signal coupling to the sensitive receive chain. In this article, we present novel state-of-the-art antenna solutions as well as digital self-interference cancellation algorithms for compact MIMO fullduplex relays, specifically targeted for reduced-cost deployments in local area networks. The presented antenna design builds on resonant wavetraps and is shown to provide passive isolations on the order of 60-70 dB. We also discuss and present advanced digital cancellation solutions, beyond classical linear processing, specifically tailored against nonlinear distortion of the power amplifier when operating close to saturation. Measured results from a complete demonstrator system, integrating antennas, RF cancellation, and nonlinear digital cancellation, are also presented, evidencing close to 100 dB of overall self-interference suppression. The reported results indicate that building and deploying compact full-duplex MIMO relays is already technologically feasible.

引用

页码：91 / 101

页数：11

共 19 条

[11] Widely Linear Digital Self-Interference Cancellation in Direct-Conversion Full-Duplex Transceiver [J].