BCH codes for 5G wireless communication systems over multipath fading channel

Abstract

<span>Due to its large peak to average power ratio (PAPR) and high out of band emission (OOBE), OFDM doesn't meet the requirements of 5G services. Additionally, it supports only one type of waveform parameters in entire bandwidth. In contrast, f-OFDM is dividing the system's bandwidth into a number of subbands to support several waveform parameters based on various service scenarios. So, Filtered-OFDM (f-OFDM) is considered as a modern enabler of the flexible waveform to overcome the OFDM drawbacks while remaining its advantages as well as, to encounter the new challenges that faced 5G. Nonetheless, there is a trade-off among OOBE, PAPR and SNR performance. Meanwhile, channel coding technology is one of the most important issue in physical layer which is playing an essential role in order to achieve the reliability and latency. So, BCH code has been suggested in this paper for f-OFDM system to achieve the reliability of transmission information and thus improving BER performance over multipath fading channel. Whilst, BCH-LTE system is introduced as a baseline in this paper that using for comparison purpose with proposed system. Simulation results showed that the proposed BCH-f-OFDM system was significantly better than BCH-LTE system in terms of decreasing OOBE and achieving improving in BER performance. Although, PAPR levels was stilling high in proposed system due to the trade-off among OOBE, PAPR and SNR performance. However, the proposed system is considered a promising candidate to meet the requirements of 5G services because of its ability to solve two important issues in between three trade-offs'.</span>

User equipment geolocation depended on long-term evolution signal-level measurements and timing advance

“…Wireless cellular communication has improved rapidly in recent years. Long-term evolution (LTE) 4G has a robust, reliable, flexible, and peak data rate and is anticipated to reach 77.5 exabytes by 2022 [1]- [5]. Therefore, wireless geolocation has become the main part of human life due to the highly demanded location-based services and applications.…”

Digital filters windowing for data transmission enhancement in communication channel

“…The mentioned situations drive the necessity to show an appropriate modulation scheme in future data communication networks. Tacking in to consideration the requirements of the high spectrum efficiency, high transmission rate and business diversity in the future networks, researchers and technicians in associated fields have making a phenomenal achievement on a number of replaced singlecarrier or multicarrier data transmission modulation schemes [27], including discrete fourier transform (DFT) spread OFDM (CP-DFT-s-OFDM) [15], [28], filter bank multicarrier (FBMC) [29], generalized frequency division multiplexing (GFDM) [30], universal filtered multicarrier (UFMC) [31], and filtered-orthogonal frequency division multiplexing (F-OFDM) [32], [33]. Despite from traditional signal design techniques where signal parameters are obtained by hand, with the improvement of machine learning algorithms, signal structure approaches with data-driven models have attended ascending attention.…”

Study of the operational SNR while constructing polar codes

“…Thus in our work we may use simple algorithm only, namely Bhattacharyya bounds based construction. The readers wanting to go deeper into the current study may experiment separately the orthogonal frequencydivision multiplexing (OFDM) [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] and exploit our approach to get the effect of such modulation technique on the performance of the code construction. Obviously, OFDM is still an ultimate candidate for wireless applications, since it allows resolving the well-known problem of spectrum underutilization [25].…”