A Survey on Multicarrier Communications: Prototype Filters, Lattice Structures, and Implementation Aspects
In this paper we address the practical problems when dealing with synchronization and channel estimation in a filter bank based multicarrier system. We present an approach for performing timing synchronization, carrier frequency offset estimation and correction, and channel estimation based on the use of the same training sequences for all the three tasks. We show that it is possible to perform them all after the analysis filter bank at the receiver, at low sampling rate, taking advantage of the high selectivity of the subband filters. The possibility to implement all the receiver baseband signal processing functionalities in frequency domain results in a very flexible overall receiver architecture, suitable for dynamic use of the frequency spectrum.