Widely Linear Digital Self-Interference Cancellation in Direct-Conversion Full-Duplex Transceiver
By Dani Korpi, Lauri Anttila, Ville Syrjälä, Mikko Valkama. IEEE Journal on Selected Areas in Communications, 2014
318 citations recorded by the source corpus.
This paper addresses the modeling and cancellation of self-interference in full-duplex direct-conversion radio transceivers, operating under practical imperfect radio frequency (RF) components. First, detailed self-interference signal modeling is carried out, taking into account the most important RF imperfections, namely, transmitter power amplifier nonlinear distortion as well as transmitter and receiver IQ mixer amplitude and phase imbalances. The analysis shows that after realistic antenna isolation and RF cancellation, the dominant self-interference waveform at the receiver digital baseband can be modeled through a widely linear transformation of the original transmit data, opposed to classical purely linear models. Such widely linear self-interference waveform is physically stemming from the transmitter and receiver IQ imaging and cannot be efficiently suppressed by classical linear digital cancellation. Motivated by this, novel widely linear digital self-interference cancellation processing is then proposed and formulated, combined with efficient parameter estimation methods. Extensive simulation results demonstrate that the proposed widely linear cancellation processing clearly outperforms the existing linear solutions, hence enabling the use of practical low-cost RF front ends utilizing IQ mixing in full-duplex transceivers.
Subfields: Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/14f9d8fb3914d68d33d55b4c9c9b981f7a20dff7
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In Electrical and Electronic Engineering
- Risto Wichman
- Taneli Riihonen
- Lauri Anttila
- Mikko Valkama
- Dani Korpi
- Kenneth E. Kolodziej
- Bradley T. Perry
- Jeffrey S. Herd
Citations in the corpus
- Full-Duplex Transceiver System Calculations: Analysis of ADC and Linearity Challenges (2014, background): “Furthermore, the impact of IQ mismatch induced mirror imaging has recently been addressd in [12].”
- In-Band Full-Duplex Technology: Techniques and Systems Survey (2019, methodology): “This technique has been numerically analyzed and simulated for a typical direct-conversion transceiver operating at different transmit power levels [99].”