Joint channel mitigation and side information estimation for GFDM systems in indoor environments

A Tunable Energy Signal for Intensity Modulation and Direct Detection Systems: Theory, Simulations, and Experiments

“…The proposed Ax-PAM is generated utilising a position matrix P which is yielded by the Algorithm 1, that run only once in the beginning of the process for optimal case. However, to showcase the energy tuning, three different cases for T are considered that yield different cost functions as per (10).…”

“…The process of energy tuning is illustrated in Fig. 4, where the time domain signals of Ax-PAM modulation are plotted in all different cases with different cost functions ((C1 < C2 < C3)) obtained using (10). The difference among the time domain waveforms for cost function C1 to C3 can be observed in Fig.…”

Investigation of blind CFO estimation for GFDM system using universal software radio peripheral: theory, simulations and experiments

“…where r 1 and r 2 are defined in (19) and (20). The motivation for the algorithm is from the closer inspection of (10) and (11) in which the number of observations is obtained from symbol rate sampling.…”

“…This study attempts to implement the GFDM system on realtime hardware named universal software radio peripheral (USRP) for testing the real-time capability in the perspective of blind synchronisation for the first time. For multipath channels, channel equalisation on unsynchronised data would lead to improper selection of GFDM block, which causes erroneous effects [19]. After examining the importance of this phenomenon, we implement synchronisation algorithms before channel estimation.…”

Low complex implementation of GFDM system using USRP

“…Though GFDM is able to address the shortcomings of OFDM, the circular prototyping mechanism destroyed the orthogonality of the GFDM system and introduced self‐interference between time slots of the neighbouring subcarriers. Moreover, the GFDM system is having a rectangular grid structure and hence offers flexibility at the cost of receiver complexity [12]. Therefore, high complexity and self‐interference are the primary disadvantages of the GFDM system.…”