Self-interference mitigation in full-duplex base-station using dual polarized reflect-array

This paper proposes the use of reflect-array to mitigate self-interference in the propagation domain aiming to achieve a full-duplex mobile system. An ultra-wideband reflect-array is designed to enable full-duplex in an indoor/outdoor LTE base-station with half-duplex users. The antenna design is customized to meet the full-duplex requirements by generating two cross-polarized beams using two separate feeders to achieve high isolation between the downlink and uplink signals. The paper also analyzes the components of self-interference in the direct and back-scattered paths, and the amount of isolation that can be achieved in a wideband system. Both reflect-array and full-duplex technologies are strong candidates to be used in 5G.

[1]  Muhammad Ramlee Kamarudin,et al.  A Review of Wideband Reflectarray Antennas for 5G Communication Systems , 2017, IEEE Access.

[2]  J. Encinar,et al.  Reflectarray antennas , 2007, Developments in Antenna Analysis and Design: Volume 2.

[3]  A. Ludwig.  The definition of cross polarization , 1973 .

[4]  J.H. Reed,et al.  Antenna Isolation, Wideband Multipath Propagation Measurements, and Interference Mitigation for On-frequency Repeaters , 2004, IEEE SoutheastCon, 2004. Proceedings..

[5]  Nidal Zarifeh,et al.  I/Q imbalance calibration for higher self-interference cancellation levels in Full-Duplex wireless transceivers , 2014, 1st International Conference on 5G for Ubiquitous Connectivity.

[6]  A. A. Mitkees,et al.  Wideband rectangular dielectric resonator elements reflectarray , 2012, The 2nd Middle East Conference on Antennas and Propagation.

[7]  Thomas Kaiser,et al.  UWB Reflectarray Antenna for chipless RFID applications , 2014, 2014 31st National Radio Science Conference (NRSC).

[8]  Philip Levis,et al.  Beyond full duplex wireless , 2012, 2012 Conference Record of the Forty Sixth Asilomar Conference on Signals, Systems and Computers (ASILOMAR).

[9]  Ashutosh Sabharwal,et al.  Passive Self-Interference Suppression for Full-Duplex Infrastructure Nodes , 2013, IEEE Transactions on Wireless Communications.

[10]  Tsuyoshi Murata,et al.  {m , 1934, ACML.

[11]  M. R. Chaharmir,et al.  Design of Broadband, Single Layer Dual-Band Large Reflectarray Using Multi Open Loop Elements , 2010, IEEE Transactions on Antennas and Propagation.

[12]  Thomas Kaiser,et al.  General Principles and Basic Algorithms for Full-duplex Transmission , 2016 .

[13]  J. Encinar,et al.  Bandwidth Improvement in Large Reflectarrays by Using True-Time Delay , 2008, IEEE Transactions on Antennas and Propagation.

[14]  N. K. Shankaranarayanan,et al.  Design and Characterization of a Full-Duplex Multiantenna System for WiFi Networks , 2012, IEEE Transactions on Vehicular Technology.

[15]  John Huang,et al.  Bandwidth study of microstrip reflectarray and a novel phased reflectarray concept , 1995, IEEE Antennas and Propagation Society International Symposium. 1995 Digest.

[16]  Ashutosh Sabharwal,et al.  Full-duplex wireless communications using off-the-shelf radios: Feasibility and first results , 2010, 2010 Conference Record of the Forty Fourth Asilomar Conference on Signals, Systems and Computers.