Active Interference Cancellation for Systems with Antenna Selection

This paper presents an improved active interference cancellation (AIC) algorithm for ultra wideband (UWB) systems with antenna selection on a per subcarrier basis. The improved algorithm overcomes the drawbacks of the conventional AIC algorithms by jointly minimizing the notch depth over multiple transmitter antennas, while ensuring that the power transmitted on the AIC tones adheres to the spectral mask imposed by the Federal Communications Committee (FCC). The improved algorithm is shown, through simulation and hardware demonstration, to provide sufficiently deep spectral notches for multiple transmitter antennas and to effectively suppress the excess power of the AIC tones generated by the conventional AIC algorithms.