An Integrated CMOS Passive Self-Interference Mitigation Technique for FDD Radios

This paper presents an integrated passive self-interference mitigation (SIM) technique for FDD radios. A Four Port Canceller (FPC) serves a dual function as a receiver input matching network, and provides an auxiliary path from the transmitter (TX) to the receiver (RX) to perform leakage cancellatio...

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Bibliographic Details
Published in:IEEE journal of solid-state circuits 2015-05, Vol.50 (5), p.1176-1188
Main Authors: Tong Zhang, Suvarna, Apsara Ravish, Bhagavatula, Venumadhav, Rudell, Jacques Christophe
Format: Article
Language:English
Subjects:
Couplings
Fully passive
interference suppression
Multiaccess communication
Noise
Receivers
SAW-less transceivers
Spread spectrum communication
Transceivers
transmitter leakage
Tuning
Wideband Code Division multiple access (WCDMA)
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Summary:This paper presents an integrated passive self-interference mitigation (SIM) technique for FDD radios. A Four Port Canceller (FPC) serves a dual function as a receiver input matching network, and provides an auxiliary path from the transmitter (TX) to the receiver (RX) to perform leakage cancellation, with minimal penalty on the RX noise figure (NF), and power consumption. An example of this technique is applied to the design of a WCDMA front-end consisting of a low noise amplifier (LNA), the FPC, and an emulated power amplifier (PA) in a 40 nm, 6-metal-layer TSMC CMOS process. With proper tuning of the FPC and the use of an off-chip +30 dBm power amplifier, greater than 20 dB of TX leakage suppression is achieved over a cancellation bandwidth of 5 MHz.
ISSN:0018-9200
1558-173X
DOI:10.1109/JSSC.2015.2408324