hannel is non-zero. As shown in Fig. 3. 1a, Subchannel Number Subchannel Number Fig. 3.1 Section of a filter bank. (a) OFDM and (b) FBMC-OQAM relying on Phydyas filter [13] with a overlapping factor 4 P. Singh and E. Sharma OFDM filter bank has significantly higher OOB emission due to the sinc-shaped spectrum of the rectangular prototype filter. Therefore, performance of OFDM- based systems degrades severely in the presence of synchronization error due to carrier frequency offset (CFO) and timing offset. On the other hand, as can be observed from Fig. 3.1b, only adjacent subcarriers are overlapping in FBMC- OQAM due to the associated well frequency-time localized prototype filter. Thus, one can separate the adjacent bands by inserting an empty subcarrier between them. Furthermore, the sharp prototype filter in FBMC-OQAM significantly lowers down the OOB emission and relaxes the stringent synchronization requirement in such systems [14]. Additionally, these sharp filters also avoid the need for CP that is oth- erwise required in OFDM to remove inter-symbol-interference (ISI). This increases the spectral efficiency of FBMC-OQAM-based systems. The implementation of FBMC-OQAM can be realised using a computationally efficient polyphase structure [15]. Furthermore, for relatively low frequency-selective channels, FBMC-OQAM can be efficiently coupled to MIMO technology [16]. Additionally, the concept of GFDM can also be extended to FBMC-OQAM [17, 18]. The resulting signalling format from this amalgamation is called circular FBMC (C-FBMC). The references [19] and [4], respectively, show the benefits of FBMC-OQAM waveform over its OFDM counterpart in the uplink of multi-user (MU) networks and cognitive radios. In the light of the above-listed benefits of FBMC-OQAM, and its ability to address the shortcomings of OFDM by using sharp pulse shaping, FBMC- OQAM has recently received significant research interests [16, 20-23], which reflect that FBMC-OQAM is a compelling signalling technique for future wireless communication sy