Analog Baseband Cancellation for Full-Duplex: An Experiment Driven Analysis

Recent wireless testbed implementations have proven that full-duplex communication is in fact possible and can outperform half-duplex systems. Many of these implementations modify existing half-duplex systems to operate in full-duplex. To realize the full potential of full-duplex, radios need to be designed with self-interference in mind. In our work, we use a novel patch antenna prototype in an experimental setup to characterize the self-interference channel between transmit and receive radios. We derive an equivalent analytical baseband model and propose analog baseband cancellation techniques to complement the RF cancellation provided by the patch antenna prototype. Our results show that a wide bandwidth, moderate isolation scheme achieves up to 2.4 bps/Hz higher achievable rate than a narrow bandwidth, high isolation scheme. Furthermore, the analog baseband cancellation yields a 10-10,000 improvement in BER over RF only cancellation.

[1]  Ashutosh Sabharwal,et al.  On the Impact of Phase Noise on Active Cancelation in Wireless Full-Duplex , 2012, IEEE Transactions on Vehicular Technology.

[2]  Sampath Rangarajan,et al.  The case for antenna cancellation for scalable full-duplex wireless communications , 2011, HotNets-X.

[3]  Ahmed M. Eltawil,et al.  Self-interference cancellation with phase noise induced ICI suppression for full-duplex systems , 2013, 2013 IEEE Global Communications Conference (GLOBECOM).

[4]  Thomas M. Cover,et al.  Elements of Information Theory , 2005 .

[5]  Philip Levis,et al.  Practical, real-time, full duplex wireless , 2011, MobiCom.

[6]  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.

[7]  Sampath Rangarajan,et al.  MIDU: enabling MIMO full duplex , 2012, Mobicom '12.

[8]  Taneli Riihonen,et al.  Analog and digital self-interference cancellation in full-duplex MIMO-OFDM transceivers with limited resolution in A/D conversion , 2012, 2012 Conference Record of the Forty Sixth Asilomar Conference on Signals, Systems and Computers (ASILOMAR).

[9]  Ashutosh Sabharwal,et al.  Empowering full-duplex wireless communication by exploiting directional diversity , 2011, 2011 Conference Record of the Forty Fifth Asilomar Conference on Signals, Systems and Computers (ASILOMAR).

[10]  E. Ahmed,et al.  Simultaneous transmit and sense for cognitive radios using full-duplex: A first study , 2012, Proceedings of the 2012 IEEE International Symposium on Antennas and Propagation.

[11]  Ashutosh Sabharwal,et al.  Asynchronous full-duplex wireless , 2012, 2012 Fourth International Conference on Communication Systems and Networks (COMSNETS 2012).

[12]  Ashutosh Sabharwal,et al.  Distributed Full-Duplex via Wireless Side-Channels: Bounds and Protocols , 2012, IEEE Transactions on Wireless Communications.

[13]  Philip Levis,et al.  Achieving single channel, full duplex wireless communication , 2010, MobiCom.

[14]  Sachin Katti,et al.  Full duplex radios , 2013, SIGCOMM.

[15]  Philip Schniter,et al.  Hardware phenomenological effects on cochannel full-duplex MIMO relay performance , 2012, 2012 Conference Record of the Forty Sixth Asilomar Conference on Signals, Systems and Computers (ASILOMAR).

[16]  Ashutosh Sabharwal,et al.  Understanding the impact of phase noise on active cancellation in wireless full-duplex , 2012, 2012 Conference Record of the Forty Sixth Asilomar Conference on Signals, Systems and Computers (ASILOMAR).

[17]  Philip Schniter,et al.  Full-Duplex MIMO Relaying: Achievable Rates Under Limited Dynamic Range , 2011, IEEE Journal on Selected Areas in Communications.

[18]  Lei Zhang,et al.  Virtual full-duplex wireless communication via rapid on-off-division duplex , 2010, 2010 48th Annual Allerton Conference on Communication, Control, and Computing (Allerton).

[19]  Katsuyuki Haneda,et al.  Measurement of loop-back interference channels for outdoor-to-indoor full-duplex radio relays , 2010, Proceedings of the Fourth European Conference on Antennas and Propagation.

[20]  Dinan Gunawardena,et al.  Rethinking Indoor Wireless Mesh Design: Low Power, Low Frequency, Full-Duplex , 2010, 2010 Fifth IEEE Workshop on Wireless Mesh Networks.

[21]  Ashutosh Sabharwal,et al.  Experiment-Driven Characterization of Full-Duplex Wireless Systems , 2011, IEEE Transactions on Wireless Communications.

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

[23]  M.Eng. Ir. Gamantyo Hendrantoro,et al.  PENGUKURAN RESPON IMPULS KANAL RADIO MIMO 2 X 2 PADA FREKUENSI 2,4 GHz MENGGUNAKAN WARP (WIRELESS OPEN ACCESS RESEARCH PLATFORM) , 2014 .

[24]  Jie Lu,et al.  A High-Isolation Dual-Polarization Microstrip Patch Antenna With Quasi-Cross-Shaped Coupling Slot , 2011, IEEE Transactions on Antennas and Propagation.

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

[26]  Taneli Riihonen,et al.  Large-system analysis of rate regions in bidirectional full-duplex MIMO link: Suppression versus cancellation , 2013, 2013 47th Annual Conference on Information Sciences and Systems (CISS).