DefinePK

Abstract

This paper deals with the issues present in a Digital Beam Forming Network (DBFN) system related to the non-idealities introduced by the hardware implementation. In particular, the paper considers the mismatches of the different electronic chains (corresponding to the different beams) used for the signal conditioning and acquisition. In this work a new algorithm for the chain calibration is proposed and analyzed. This algorithm has been developed for obtaining three fundamental advantages with respect to other methods proposed in the literature. The algorithm doesn't take any assumptions regarding the primary signal structure; it can be applied during the normal working of the system and doesn't require any initial calibrations. The algorithm is based on the injection of a low level pseudo-noise signal that is recovered and used for the training of an adaptive filter.