An Adaptive Spatial Blocker Cancellation Receiver for Multiple Antenna Systems

Abstract

Whereas previous architectures for spatial blocker cancellation were hindered by their scalability with the number of antennas leading to a high increase in the area and power consumption with the increase in the number of antennas, we propose a blocker cancellation technique that overcomes this by having linear complexity with the number of antennas, making it suitable for receivers with a large number of antennas. The proposed cancellation technique attenuates the blocker signals prior to the ADC relaxing its dynamic range requirement, while preserving the field-of-view (FoV) in each antenna element for subsequent digital beamforming/array signal processing.