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In-phase and Quadrature (I/Q) amplitude and phase imbalances are inevitably caused by signal processing in the analog components such as I/Q mixers, phase shifters, filters, and analog/digital converters within I/Q branches. In the implementation of a modern wireless communication system, I/Q imbalances act as one of the main impairments degrading system performance. Particularly in the Orthogonal Frequency Division Multiplexing (OFDM) schemes adapted in a number of wireless communication systems such as DAB, DVB-T, WLAN (802.11 a/g/n), WPAN (802.15.3a), WMAN (802.16 a/d/e), and MBWA (802.20), I/Q imbalances introduce Inter-Channel Interference (ICI) and non-linearly distort the baseband signals.
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