## 7 Conclusions and Further Work  
In this paper, radiofrequency impairments were studied in digital broadcasting. Mainly, the study was focused on the CFO impact on DVB-T2 and NUCs, and UFMC-based DVB-T2 systems. As the DVB-T2 standard is mainly based on OFDM, this system suffers from some frequency offset that decreases the system performance. The study of these impairments was investigated to highlight their impact on the terrestrial digital broadcasting system DVB-T2. Moreover, UFMC and NUC techniques are advanced signal processing techniques that have shown good performance in DVB-T2. This work also studied the impact of the CFO on the system, including both NUCs and UFMC. The main results are presented as follows: UFMC-based DVB-T2 is less responsive to the CFO than the native DVB-T2 in urban environments; when NUCs are additionally used in UFMC-based DVB-T2, the same conclusion is drawn. This work gives some trends in the use of mobile reception in the DVB-T2 system. It may help broadcasters with a mobile-reception use case in their DTT networks. One of the prospects of this work would be to obtain measurements to compare with our simulations. It could be achieved by programming software radios, such as a SDR (Software-Defined Radio) with GNU software, taking into account the transformations that we made to the native DVB-T2, and by adding the faults brought by the CFO in a synthetic way to the receiver. Then, the available system could actually measure the bit error rate and constellations, as well as the MER and EVM, even though the channel would not be representative of the TU6. In a second step, a channel synthesizer could be developed to counteract this problem. Referring to Table 3, another prospect for improving our paper would be to improve our study of the sensitivity of DVB-T2 to the CFO (either native DVB-T2, with or without UFMC, with or without rotated constellation) by treating a larger number of parameter values in the simulations, such as the size of the QAM constellation, the 2D distribution of the non-uniform constellation (NUC), the number of OFDM subcarriers, the cyclic prefix, the choice of values corresponding to the UFMC sub-band number, UFMC sub-band bandwidth, the UFMC filter length, and a choice of simulation channel other than TU6 like the \"0 dB echo\" channel, which corresponds to the channel used in an SFN environment. Also, the MISO technique is an optional feature of the DVB-T2 standard, but it offers a number of advantages, such as signal robustness improvement and coverage enhancement. The CFO impact on performance could be investigated in DVB-T2 and UFMC/NUC-based DVB-T2 when the MISO technique is applied. In a third step, as FBMC is a multicarrier modulation that obtained good performance in digital television systems with higher complexity, a reduced complexity version of this modulation could be studied in DVB-T2, and the CFO impact could be investigated to gather the best modulation when the CFO is considered. Finally, as a last step, the network coverage reduction induced by the CFO penalties could be computed in DVB-T2 systems, whether native or improved by NUCs or UFMC. Conceptualization, S.Z., A.-C.H., and V.M. ; methodology, S.Z. and A.-C.H. ; software, S.Z. and A.-C.H. ; validation M.D. and V.M. ; formal analysis, S.Z., A.-C.H., M.D., and V.M. ; investigation, S.Z. and A.-C.H. ; resources, A.-C.H. ; data curation, S.Z. and A.-C.H. ; writing--original draft preparation, S.Z. and A.-C.H. ; writing--review and editing, A.-C.H., M.D. and V.M. ; visualization, M.D. and V.M. ; supervision, V.M. ; project administration, M.D. and V.M. ; funding acquisition, V.M. All authors have read and agreed to the published version of the manuscript. This research was funded by ARES-CCD within the framework of the PHORAN PFS project. This work was carried out with support from the ARES-CCD within the framework of the PHORAN PFS project. The authors declare no conflicts of interest.