POWER BALANCING IN FBMC-MISO SYSTEMS

摘要

This paper addresses the fairness in power allocation optimizationfor FBMC-MISO systems. Given a power budgetwe have proposed a sub-optimal strategy to distributethe power among the subcarriers. Firstly, with the aim ofmitigating the interference terms as much as possible twoprecoding techniques have been proposed: WMF and Tx-MDIR. As a benchmark we have considered a transmit filterthat is designed according to the ZF criterion. Then, assumingthat the noise power dominates over the interferences wehave allocated the power according to the solution providedby the max-min SINR problem which balances the SINRs.When the channel can be assumed flat in the subcarrier passband region both ZF and Tx-MDIR can take advantage of thepower control to achieve a BER equal to 10?4 by saving 3dBin the transmitted power with respect to the uniform powerallocation strategy. Simulation-based results have shown thatfor very frequency selective channels the BER plot of ZF exhibitsan error floor. In this scenario, Tx-MDIR and WMFare able to boost the BER in the Eb/N0 range [15dB-30dB]and [24dB-30dB], respectively.