Abstract
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. 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 dB increments 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.
Highlights
The upcoming generations of mobile networks tend broadly to keep up the growing requirements of future transmission [1]
The FDAC of this case can be further enlarged, but the multi-carrier orthogonal generalized frequency division multiplexing (OGFDM) system tends currently to work at the 6 GHz band radio frequency, the since the multi-carrier OGFDM system tends currently to work at the 6 GHz band radio frequency, employed FDAC is upgraded by only 50% of the initial case
At the high boost (HB) where the recorded SNR equals to 25.1 dB, the number of frequency subcarriers with a further bit is enhanced to 24 improved cases with the developed OGFDM in comparison with only 12 and 6 amended subcarriers with the initial OGFDM and generalized frequency division multiplexing (GFDM) respectively
Summary
The upcoming generations of mobile networks tend broadly to keep up the growing requirements of future transmission [1]. From the single carrier transmission perspective, the introduced OGFDM doubled the wireless channel capacity of mobile in comparison with the GFDM [16]. The system performance in terms of the channel capacity and bit error rate (BER) can be highly influenced by the utilized way of channel participation To mitigate such an issue, very recently, the single carrier of the OGFDM has been promoted to the multi-carrier system [18]. By adopting such a hybrid different sizes of bit token (N) on an input stream of digital data By adopting such a hybrid modulation modulation with an enhanced channel state, an extra number of bits can be allocated for each with an enhanced channel state, an extra number of bits can be allocated for each employed subcarrier employed subcarrier at the acceptable limit of errors.
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