RF Imperfections in High-rate Wireless Systems: Impact and Digital Compensation
RF Imperfections in High-rate Wireless Systems: Impact and Digital Compensation
Compensation of IQ imbalance and phase noise in OFDM systems
IEEE Transactions on Wireless Communications
Low-Complexity EM-based Joint Acquisition of the Carrier Frequency Offset and IQ Imbalance
IEEE Transactions on Wireless Communications
Hi-index | 0.00 |
A time domain IQ compensation approach is proposed for wideband application where the IQ imbalance is frequency dependent. The proposed approach relies on known signal such as preamble in orthogonal frequency-division multiplexing (OFDM) signal data frame and radar echoes. Signal correlation property is used for noise elimination and signal frequency spectrum is divided into several sub-bands to deal with frequency-dependent IQ imbalance in wideband scenarios. In order to solve the number of computation increase problem caused by frequency spectrum sub-bands division, complementary code sequences are applied for calculation simplification by exploiting the uncorrelated properties between complementary code matrixes. By comparison with traditional time domain compensation method, the proposed approach exhibits better performance in low signal-to-noise ratio (SNR) and wideband scenarios.