Artículos de revistas
Uplink CFO compensation for FBMC multiple access and OFDMA in a high mobility scenario
Fecha
2014-06Registro en:
González, Gustavo José; Gregorio, Fernando Hugo; Cousseau, Juan Edmundo; Wichman, Risto ; Werner, Stefan ; Uplink CFO compensation for FBMC multiple access and OFDMA in a high mobility scenario; Elsevier; Physical Communication; 11; 6-2014; 56-66
1874-4907
Autor
González, Gustavo José
Gregorio, Fernando Hugo
Cousseau, Juan Edmundo
Wichman, Risto
Werner, Stefan
Resumen
We study in this work CFO compensation methods for two multicarrier multiple access techniques in a high mobility scenario. In particular, we consider orthogonal frequency division multiple access (OFDMA) and filter bank multicarrier multiple access (FBMC-MA). The main motivation for this study is not only the different sensitivity these multicarrier techniques have to CFO but also the different methods they use to reduce CFO effect. In a high mobility scenario the CFO is re-estimated to follow its variation. We show that the frequency at which the CFO is re-estimated has a strong influence in the performance and the complexity of the proposed compensation methods. Additionally, we present a low-complexity CFO compensation method for OFDMA that employs a better approximation of the intercarrier interference than previous approaches. Regarding FBMC-MA, we introduce an extension of a CFO-compensation method that allows to consider a multitap channel equalizer. Finally, using simulations, we compare the performance of the compensation methods over several channel and time-varying CFO conditions.