Experimental investigation of quadrature downconversion impairments estimation and compensation methods to the M-QAM signals

Abstract

Quadrature downconversion impairments should be taken into account and compensated to the increasing of the Direct Conversion Receiver (DCR) reception quality. DC-offset and I/Q-imbalance are fitted into this group. Experimental estimation of two relatively simple compensation methods for the indicated drawbacks is reviewed in the paper. Energy efficiency and computational complexity estimation are also including into the work.