Dynamic Bit Loading with the OGFDM Waveform Maximizes Bit Rate of Future Mobile Communications

Mohammad Kadhum*, Triantafyllos Kanakis, Robin Crockett

*Corresponding author for this work

Research output: Contribution to Book/ReportConference Contributionpeer-review


A new Dynamic Bit Loading (DBL) scheme with the Orthogonal Generalized Frequency Division Multiplexing (OGFDM) is, for the first time, proposed, discussed and assessed. The key concept of this hybrid modulation format depends substantially on the adaptive distribution of the bit stream to be more compatible with the gained capacity of the realistic channel state. Due to the negative impact of employing the AQ1 fixed schemes of digital modulation on the performance of the conventional telecommunications systems, the influence of using the multi-level modulation system is investigated for the future applications of mobile communications. Utilising the DBL in the physical layer (PHY), a flexible range of modulation formats can be optimally assigned for each applied frequency sub-carrier in accordance with wireless channel circumstances. In addition, depending on the supportive features of the proposed modulation system, the performance in terms of channel capacity can be maximised at the acceptable limit of the Bit Error Rate (BER). As such, an extra enhancement can be achieved in the spectrum efficiency (SE) of the adaptively modulated wireless signal. Thus, an adjustable boost of the transmission range of used modulation formats can be reached with the introduced adaptation system. The performance of the DBL system through a wireless mobile channel under the Additive White Gaussian Noise (AWGN) is evaluated according to a various level of the Signal to Noise Ratio (SNR). Ultimately, regarding the numerical simulation, a MATLAB code is employed to simulate the performance (channel capacity & BER) of the proposed DBL that is fundamentally accommodated by the recent candidate waveform of future mobile technology (OGFDM).
Original languageEnglish
Title of host publicationIntelligent Computing
Subtitle of host publicationProceedings of the 2019 Computing Conference, Volume 2
EditorsKohei Arai, Rahul Bhatia, Supriya Kapoor
Number of pages11
ISBN (Electronic)9783030228682
ISBN (Print)9783030228675
Publication statusE-pub ahead of print - 9 Jul 2019
EventAnnual Conference of the Subject Centre for Information and Computer Sciences -
Duration: 16 Jul 201917 Jul 2019
Conference number: 10

Publication series

NameAdvances in Intelligent Systems and Computing


ConferenceAnnual Conference of the Subject Centre for Information and Computer Sciences
Internet address


  • Orthogonal Generalized Frequency Division Multiplexing (OGFDM)
  • Dynamic Bit Loading (DBL)
  • Modulation formats Channel capacity Signal to Noise Ratio (SNR)
  • Bit Error Rate (BER)
  • Physical layer (PHY)
  • Mobile communications Spectrum Efficiency (SE)


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