Optimum Single Antenna Full Duplex Using Hybrid Junctions

This paper investigates electrical balance (EB) in hybrid junctions as a method of achieving transmitter-receiver isolation in single antenna full duplex wireless systems. A novel technique for maximizing isolation in EB duplexers is presented, and we show that the maximum achievable isolation is proportional to the variance of the antenna reflection coefficient with respect to frequency. Consequently, antenna characteristics can have a significant detrimental impact on the isolation bandwidth. Simulations that include embedded antenna measurements show a mean isolation of 62 dB over a 20-MHz bandwidth at 1.9 GHz but relatively poor performance at wider bandwidths. Furthermore, the operational environment can have a significant impact on isolation performance. We present a novel method of characterizing radio reflections being returned to a single antenna. Results show as little as 39 dB of attenuation in the radio echo for a highly reflective indoor environment at 1.9 GHz and that the mean isolation of an EB duplexer is reduced by 7 dB in this environment. A full duplex architecture exploiting EB is proposed.

[1]  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).

[2]  D. W. Bliss,et al.  Simultaneous Transmission and Reception for Improved Wireless Network Performance , 2007, 2007 IEEE/SP 14th Workshop on Statistical Signal Processing.

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

[4]  Michael Faulkner,et al.  Analysis of an Adaptive Wideband Duplexer With Double-Loop Cancellation , 2007, IEEE Transactions on Vehicular Technology.

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

[6]  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).

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

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

[9]  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.

[10]  Mark A Beach,et al.  Division-free duplex for wireless applications , 1998 .

[11]  Hooman Darabi,et al.  A Multiband RF Antenna Duplexer on CMOS: Design and Performance , 2013, IEEE Journal of Solid-State Circuits.

[12]  Asad A. Abidi,et al.  A tunable integrated duplexer with 50dB isolation in 40nm CMOS , 2009, 2009 IEEE International Solid-State Circuits Conference - Digest of Technical Papers.

[13]  Sampath Rangarajan,et al.  Wideband digital cancellation for full-duplex communications , 2012, 2012 Conference Record of the Forty Sixth Asilomar Conference on Signals, Systems and Computers (ASILOMAR).

[14]  Dinan Gunawardena,et al.  Efficiency and Fairness in Distributed Wireless Networks Through Self-interference Cancellation and Scheduling , 2009 .

[15]  P. Pursula,et al.  Hybrid Transformer-Based Adaptive RF Front End for UHF RFID Mobile Phone Readers , 2008, 2008 IEEE International Conference on RFID.

[16]  Sampath Rangarajan,et al.  Characterizing the throughput gain of single cell MIMO wireless systems with full duplex radios , 2012, 2012 10th International Symposium on Modeling and Optimization in Mobile, Ad Hoc and Wireless Networks (WiOpt).

[17]  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).

[18]  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).

[19]  Pekka Pursula,et al.  Wideband adaptive isolator for UHF RFID reader , 2009 .

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

[21]  Philip Schniter,et al.  Full-duplex MIMO relaying: Achievable rates under limited dynamic range , 2012, 2012 Conference Record of the Forty Sixth Asilomar Conference on Signals, Systems and Computers (ASILOMAR).

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

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

[24]  Hooman Darabi,et al.  An on-chip wideband and low-loss duplexer for 3G/4G CMOS radios , 2010, 2010 Symposium on VLSI Circuits.

[25]  Ahmad Mirzaei,et al.  Highly Integrated and Tunable RF Front Ends for Reconfigurable Multiband Transceivers: A Tutorial , 2011, IEEE Transactions on Circuits and Systems I: Regular Papers.

[26]  R. Weigel,et al.  An Interference Cancellation Technique for the Use in Multiband Software Radio Frontend Design , 2000, 2000 30th European Microwave Conference.

[27]  B. R. Myers.  Network theory-An introduction to reciprocal and nonreciprocal circuits , 1965 .

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

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

[30]  Gerhard Fettweis,et al.  Digital compensation of transmitter leakage in FDD zero‐IF receivers , 2012, Trans. Emerg. Telecommun. Technol..

[31]  P. Uthansakul,et al.  Digital and RF interference cancellation for single-channel full-duplex transceiver using a single antenna , 2013, 2013 10th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology.

[32]  S. H. Abdelhalem,et al.  Hybrid Transformer-Based Tunable Differential Duplexer in a 90-nm CMOS Process , 2013, IEEE Transactions on Microwave Theory and Techniques.

[33]  H. Vincent Poor,et al.  Full Duplexity in Beamforming-Based Multi-Hop Relay Networks , 2012, IEEE Journal on Selected Areas in Communications.

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

[35]  Jong-Ho Lee,et al.  Self-Interference Cancelation Using Phase Rotation in Full-Duplex Wireless , 2013, IEEE Transactions on Vehicular Technology.

[36]  Rodney G. Vaughan,et al.  Channels, Propagation and Antennas for Mobile Communications , 2003 .

[37]  Taneli Riihonen,et al.  Mitigation of Loopback Self-Interference in Full-Duplex MIMO Relays , 2011, IEEE Transactions on Signal Processing.