- 期刊
Estimation and Compensation of IQ Imbalance in Millimeter-Wave OFDM UWB System
摘要
A new estimation and compensation method for I/Q imbalance based on joint time and frequency domain is proposed in this paper, which is well applicable to orthogonal frequency division multiplexing (OFDM) ultra-wideband (UWB) millimeter-wave (mm-Wave) communications. Firstly, the method makes full use of the characteristics of I and Q signals in time domain, which have identical power and are uncorrelated. Amplitude imbalance factor and phase imbalance factor are estimated using preamble symbols. Secondly, a set of special pilots are designed in the frequency domain, and LS algorithm is utilized to estimate the residual imbalance factors to further reduce IQ imbalance. Simulation results show that IQ imbalance can be well estimated and compensated with low complexity.
延伸閱讀
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