Waveform design principles for 5G and beyond

Abstract

Various emerging applications in future wireless networks require rethinking the access techniques not only from the capacity perspective but also satisfying a wide variety of requirements under the same framework. Traditional Orthogonal Frequency Division Multiplexing (OFDM)-based schemes still suffer from some limitations that stand in front of their existence in future technologies. The main goal of this study is to pave the way towards rethinking the waveform design by providing the main components of a wireless communication system. The concept of the multidimensional lattice is introduced, exploiting the angular dimension that opens a new horizon in research for 5G technology and beyond. The study proposes a new way of waveform design procedure that considers the multidimensional grid, which is essential for exploiting the opportunities in spatial domain effectively. In addition, the waveform design criteria for various applications and frequency bands are presented.

Channel Estimation Techniques for OFDM and UFMC Systems for 5G Communications

“…to support rapidgrowth in M2McommunicationsandofIoT [1].In order to minimize the signaling overhead and battery and power consumption for low-end devices like simple sensor elements in 5G, they should be transmitted with synchronization conditions relaxed w.r.t time-frequency misalignments [2].…”

Study of energy efficiency of DFT-s-OFDM in hybrid RoF systems for broadband wireless access in 6G networks

“…An effective way to reduce the emerging distortions is to introduce new waveforms and modulation schemes that are both resistant to the distortion effects of conversion and retransmission in the optical domain while still being effective in organizing wireless communications. One solution can be an approach that relies on the hybridization of modulation formats of scalable 6G wireless networks, which would improve spectral efficiency, reduce power consumption, the effects of inter-channel and inter-network interference, reduce propagation delays, improve resistance to Doppler shift and phase noise [6][7][8][9][10][11][12][13] . Hybridization refers to methods for combining phase and amplitude modulations with parameterized guard interval length selection algorithms in orthogonal frequency multiplexing technology concerning the task of processing service data, the expected spread of propagation delays, and minimizing computing resources when changing channel parameters.…”

Improved Dual Sinc Pulses to Reduce ICI Power and PAPR in OFDM-based Systems

“…This is expected to increase even further with 5G and the hasty expansion of the Internet of Things (IoT). 5G application requirements such as lower latency, higher spectral efficiency, asynchronous transmission and higher peak data rate, cannot be achieved with the classical waveform in orthogonal frequency division multiplexing (OFDM), and so the design of the waveform for OFDM is an important problem that must be solved for 5G [1][2][3][4][5]. OFDM is characterized by high data transmission and bandwidth competence, multipath channel's stability, capability to convert a frequency selective fading channel into several nearly flat fading channels.…”