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This letter addresses the performance of M-PSK communications systems in the presence of gain/phase imbalances and DC-offsets in in-phase and quadrature channels. A model is established to represent the gain/phase imbalances and DC-offsets in both the transmitter and the receiver, and two closed-form formulas are derived to calculate the symbol error rate (SER) of the M-PSK communications systems...
A multi-port power amplifier (MPA) is a multi-input multi-output system that is capable of amplifying multiple input signals simultaneously by a set of shared power amplifiers without mutual interference. In a practical MPA, the component imperfections reduce the port isolation, which introduces leakage or cross-port interference. A patent-pending type-based calibration technique is studied in this...
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