On Regular Resource Grid for Filtered OFDM.

Filtered orthogonal frequency division multiplexing (F-OFDM) can accommodate diverse service requirements by introducing additional filtering to OFDM and flexibly adapting the filter according to the service requirement. However, when block filtering is flexibly adapted per-subband, the regular resource grid could be violated. In this letter, we propose a solution to maintain the regular resource grid for F-OFDM. The proposed solution is twofold: 1) it allocates guard bands inside the filter bandwidth, which is kept independent of guard band and 2) it introduces timing advance according to the filter used. It is shown in practically relevant scenarios that the proposed solution, despite its simplicity, performs better than another more complex approach.