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We study how to analyze Linear Periodically Time-Varying (LPTV) Filter Bank Based Multi-Carrier (FBMC) transmitters with Offset QAM (OQAM) modulation. Using an approach based on the Bifrequency Map and the Power Spectral Density (PSD), we can derive a Pseudo-Transfer Function for each subcarrier in the steady-state, taking the upsampling into account. Furthermore, we show that the magnitude of the...
In this contribution we compare different realizations of the polyphase networks employed in Offset QAM based Filter Bank Multicarrier (OQAM-FBMC). Our objective is to evaluate the structures' computational cost and robustness for very low complexity implementations of the prototype filter coefficients. We compare a direct form, a classical lattice realization, where in both the Canonical Signed Digit...
In this contribution we propose a simple method of obtaining a perfect reconstruction (PR) FIR prototype filter starting from a given near-perfect reconstruction (NPR) prototype filter for complex modulated filter banks. Our method consists of two steps. First, we calculate the product of a pair of polyphase components that fulfill the PR conditions, and second, we search for spectral factors that...
In this contribution we thoroughly analyze the computational effort necessary to implement a multicarrier based physical layer for wireless communications. We consider two variations of this modulation concept, namely traditional cyclic pre-x based orthogonal frequency division multiplexing (CP-OFDM) and lter bank based multicarrier (FBMC) systems. First, we give the analytical formulas for the computational...
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