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Upgrading Physical Layer of Multi-Carrier OGFDM Waveform for Improving Wireless Channel Capacity of 5G Mobile Networks and Beyond

Faculty of Arts, Science & Technology, University of Northampton, Northampton NN1 5PA, UK
This paper is an extended version of my published paper ‘New Multi-Carrier Candidate Waveform For the 5G Physical Layer of Wireless Mobile Networks’. In the proceedings of 11th IFIP Wireless Days 2019 conference, Manchester, UK, IEEE, 24–26 April 2019.
Information 2020, 11(1), 35; https://doi.org/10.3390/info11010035
Received: 29 October 2019 / Revised: 20 December 2019 / Accepted: 6 January 2020 / Published: 10 January 2020
(This article belongs to the Special Issue Emerging Topics in Wireless Communications for Future Smart Cities)
On the brink of sophisticated generations of mobile starting with the fifth-generation (5G) and moving on to the future mobile technologies, the necessity for developing the wireless telecommunications waveform is extremely required. The main reason beyond this is to support the future digital lifestyle that tends principally to maximize wireless channel capacity and number of connected users. In this paper, the upgraded design of the multi-carrier orthogonal generalized frequency division multiplexing (OGFDM) that aims to enlarge the number of mobile subscribers yet sustaining each one with a high transmission capacity is presented, explored, and evaluated. The expanded multi-carrier OGFDM can improve the performance of the future wireless network that targets equally the broad sharing operation (scalability) and elevated transmission rate. From a spectrum perspective, the upgraded OGFDM can manipulate the side effect of the increased number of network subscribers on the transmission bit-rate for each frequency subcarrier. This primarily can be achieved by utilizing the developed OGFDM features, like acceleration ability, filter orthogonality, interference avoidance, subcarrier scalability, and flexible bit loading. Consequently, the introduced OGFDM can supply lower latency, better BW efficiency, higher robustness, wider sharing, and more resilient bit loading than the current waveform. To highlight the main advantages of the proposed OGFDM, the system performance is compared with the initial design of the multicarrier OGFDM side by side with the 5G waveform generalized frequency division multiplexing (GFDM). The experimented results show that by moving from both the conventional OGFDM and GFDM with 4 GHz to the advanced OGFDM with 6 GHz, the gained channel capacity is improved. Hence, Because of the efficient use of Hilbert filters and improved rate of sampling acceleration, the upgraded system can gain about 3 dB and 1.5 increment in relative to the OGFDM and GFDM respectively. This, as a result, can maximize mainly the overall channel capacity of the enhanced OGFDM, which in turn can raise the bit-rate of each user in the mobile network. In addition, by employing the OGFDM with the dual oversampling, the achieved channel capacity in worst transmission condition is increased to around six and twelve times relative to the OGFDM and GFDM with the normal oversampling. Furthermore, applying the promoted OGFDM with the adaptive modulation comes up with maximizing the overall channel capacity up to around 1.66 dB and 3.32 dB compared to the initial OGFDM and GFDM respectively. A MATLAB simulation is applied to evaluate the transmission performance in terms of the channel capacity and the bit error rate (BER) in an electrical back-to-back wireless transmission system. View Full-Text
Keywords: orthogonal generalized frequency division multiplexing; generalized frequency division multiplexing; Hilbert filter; oversampling factor; adaptive modulation; future mobile waveforms; wireless networks; physical layer; bit error rate orthogonal generalized frequency division multiplexing; generalized frequency division multiplexing; Hilbert filter; oversampling factor; adaptive modulation; future mobile waveforms; wireless networks; physical layer; bit error rate
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Kadhum, M.R. Upgrading Physical Layer of Multi-Carrier OGFDM Waveform for Improving Wireless Channel Capacity of 5G Mobile Networks and Beyond. Information 2020, 11, 35.

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