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Circularity-Based I/Q Imbalance Compensation in Wideband Direct-Conversion Receivers
Two novel blind low-complexity I/Q imbalance compensation techniques are proposed and analyzed to digitally enhance the analog FE image attenuation in wideband direct-conversion receivers and can provide very good compensation performance with low computational resources and are robust in the face of different imbalance levels and dynamics of the received signals. Expand
Advanced methods for I/Q imbalance compensation in communication receivers
The results indicate that the I/Q imbalance can be effectively compensated during the normal operation of the receiver even in the rapidly changing case, as long as a linear system model for the imbalance is valid. Expand
Frequency-Selective I/Q Mismatch Calibration of Wideband Direct-Conversion Transmitters
This brief focuses on digital-signal-processor-based I/Q mismatch calibration in wideband direct-conversion transmitters, assuming the challenging case of frequency-dependent I/ Q mismatch, and proposes two alternative principles for calibration parameter estimation. Expand
Full-Duplex Transceiver System Calculations: Analysis of ADC and Linearity Challenges
It is observed that the nonlinear distortion produced by the transmitter PA is a significant issue in a full-duplex transceiver and, when using cheaper and less linear components, also the receiver chain nonlinearities become considerable. Expand
Widely Linear Digital Self-Interference Cancellation in Direct-Conversion Full-Duplex Transceiver
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. Expand
Joint Mitigation of Power Amplifier and I/Q Modulator Impairments in Broadband Direct-Conversion Transmitters
In this paper, we present a novel digital predistorter structure for joint mitigation of frequency-dependent power amplifier (PA) and in-phase and quadrature (I/Q) modulator impairments inExpand
Blind signal estimation in conjugate signal models with application to I/Q imbalance compensation
It will be shown that blind signal recovery in this kind of signal model is feasible using only the second-order statistics of the observed signal, under the assumption of circular or proper complex signals. Expand
Compensation of frequency-selective I/Q imbalances in wideband receivers: models and algorithms
To achieve satisfactory performance in analog I/Q (inphase/quadrature) processing-based wireless receivers, the matching of amplitudes and phases of the I and Q branches becomes vital. In practice,Expand
Joint Mitigation of Nonlinear RF and Baseband Distortions in Wideband Direct-Conversion Receivers
Software-defined radio technology is experiencing more and more attention in modern communication and radar systems. The main practical challenge in deploying such technology is related to achievingExpand
Blind Compensation of Frequency-Selective I/Q Imbalances in Quadrature Radio Receivers: Circularity -Based Approach
A simple blind (non-data aided) WL compensator structure for suppressing the mirror-frequency interference is proposed and shows impressive performance and has many additional desirable features, such as immunity to channel noise and the fading channel. Expand