TY - GEN
T1 - Analysis of transmit and receive implementation losses in full duplex wireless transceivers
AU - Regev, Dror
AU - Ginzberg, Nimrod
AU - Cohen, Emanuel
N1 - Publisher Copyright:
© 2020 IEEE.
PY - 2020/5
Y1 - 2020/5
N2 - This work studies transmit (TX) and receive (RX) power losses in single antenna in-band full duplex transceiver architectures employing passive self-interference cancellation (SIC) filters. Three different RF front-end (RFFE) approaches to realize passive primary TX-RX isolation - a circulator, an electrical-balanced duplexer (EBD), and quadrature balanced power amplifiers (QBPA), are considered and analyzed. The analysis assumes the SIC stage is implemented as a dual delay-line FIR filter with adjustable delay and amplitude. Closed-form expressions are derived to describe the accuracy of this filter in approximating frequency-selective channels over a wide bandwidth. System-level simulations at the frequency range between 5 and 6 GHz demonstrate that all three RFFEs can provide more than 60 dB isolation over 80 MHz of bandwidth for antenna reflections as high as 14 dB. TX and RX losses vary depending on the RFFE architecture and the insertion loss of the FIR filter.
AB - This work studies transmit (TX) and receive (RX) power losses in single antenna in-band full duplex transceiver architectures employing passive self-interference cancellation (SIC) filters. Three different RF front-end (RFFE) approaches to realize passive primary TX-RX isolation - a circulator, an electrical-balanced duplexer (EBD), and quadrature balanced power amplifiers (QBPA), are considered and analyzed. The analysis assumes the SIC stage is implemented as a dual delay-line FIR filter with adjustable delay and amplitude. Closed-form expressions are derived to describe the accuracy of this filter in approximating frequency-selective channels over a wide bandwidth. System-level simulations at the frequency range between 5 and 6 GHz demonstrate that all three RFFEs can provide more than 60 dB isolation over 80 MHz of bandwidth for antenna reflections as high as 14 dB. TX and RX losses vary depending on the RFFE architecture and the insertion loss of the FIR filter.
KW - Electrical Balanced Duplexer (EBD)
KW - Full Duplex
KW - Quadrature Balanced Power Amplifiers (QBPA)
KW - self-interference cancellation (SIC)
UR - http://www.scopus.com/inward/record.url?scp=85092059971&partnerID=8YFLogxK
U2 - 10.1109/WMCS49442.2020.9172411
DO - 10.1109/WMCS49442.2020.9172411
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AN - SCOPUS:85092059971
T3 - Proceedings of the 2020 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems: Making Waves in Texas, WMCS 2020
BT - Proceedings of the 2020 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2020 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems, WMCS 2020
Y2 - 26 May 2020 through 28 May 2020
ER -