Optimal phase-shifter design to cancel RF interference in multi-antenna systems

This paper introduces an analog preprocessing network (APN) operating in radio frequency (RF), to cancel signals from interferers in an antenna array system. Interference cancellation facilitates the use of low resolution ADCs. For a given ADC resolution, we will propose the optimal beamformer to minimize the overall mean squared error (MSE) between the desired user and its received estimate, while maximizing the desired signal to quantization noise ratio (SQNR). Subsequently, propose a matching pursuit design technique to represent the analytical APN transform as a linear combination of implementable phase shifters.