TY - GEN
T1 - Transmit-receive cross-modulation distortion analysis in full duplex quadrature balanced wireless transceivers
AU - Ginzberg, Nimrod
AU - Regev, Dror
AU - Tsodik, Genadiy
AU - Shilo, Shimi
AU - Ezri, Doron
AU - Cohen, Emanuel
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/12
Y1 - 2019/12
N2 - This paper presents an analysis of the nonlinear interaction between the transmit (TX) and receive (RX) signals in a quadrature balanced full duplex wireless transceiver system. A nonlinear analysis is conducted to describe the inband third-order distortion experienced by the RX signal resulting from the cross-modulation with the TX signal in a simultaneous transmit-receive scenario at the same frequency band. The theoretical analysis is verified in measurements of a quadrature balanced RF front-end, composed of two 5.5GHz class AB power amplifiers designed in 180nm CMOS process. The results indicate that the power ratio between RX carrier to third-order intermodulation distortion, corresponding to the RX EVM, is independent on the RX signal power level. At 10dB backoff from TX saturated power, RX carrier to third-order intermodulation distortion product is 34dBc, implying that at this TX power level and below no digital post-distortion operations are required to account for RX nonlinearities.
AB - This paper presents an analysis of the nonlinear interaction between the transmit (TX) and receive (RX) signals in a quadrature balanced full duplex wireless transceiver system. A nonlinear analysis is conducted to describe the inband third-order distortion experienced by the RX signal resulting from the cross-modulation with the TX signal in a simultaneous transmit-receive scenario at the same frequency band. The theoretical analysis is verified in measurements of a quadrature balanced RF front-end, composed of two 5.5GHz class AB power amplifiers designed in 180nm CMOS process. The results indicate that the power ratio between RX carrier to third-order intermodulation distortion, corresponding to the RX EVM, is independent on the RX signal power level. At 10dB backoff from TX saturated power, RX carrier to third-order intermodulation distortion product is 34dBc, implying that at this TX power level and below no digital post-distortion operations are required to account for RX nonlinearities.
KW - Cross-modulation
KW - Full duplex
KW - Intermodulation distortion
KW - Quadrature balanced power amplifiers
KW - Self-interference cancellation
KW - Simultaneous transmit and receive
UR - http://www.scopus.com/inward/record.url?scp=85082991844&partnerID=8YFLogxK
U2 - 10.1109/APMC46564.2019.9038617
DO - 10.1109/APMC46564.2019.9038617
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AN - SCOPUS:85082991844
T3 - Asia-Pacific Microwave Conference Proceedings, APMC
SP - 150
EP - 152
BT - Proceedings of the 2019 IEEE Asia-Pacific Microwave Conference, APMC 2019
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2019 IEEE Asia-Pacific Microwave Conference, APMC 2019
Y2 - 10 December 2019 through 13 December 2019
ER -