XPIC, or Cross-Polarization Interference Cancelling, is a technology used in satellite communications to enhance the performance of communication links by reducing interference caused by cross-polarization. In satellite communications, signals intended for transmission can become mixed with signals of the opposite polarity, leading to degradation in signal quality and reliability. XPIC is particularly significant in systems utilizing polarization multiplexing, where two separate signals are transmitted simultaneously using different polarizations (horizontal and vertical, for instance).
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