Sumaila Mahama

May 13, 2019

New Waveforms for 5G and Beyond Networks

Introduction The telecommunication industry has experienced enormous growth over the last few decades. It all started when the first generation (1G) of mobile telecommunication standards, which were analog systems, were introduced in the early years of the 1980s. 2G telecommunication systems soon replaced 1G. Compared to 1G, 2G was digitally encrypted, more spectrally efficient and also enabled users to now exchange plain text-based messages with its Short Message Service (SMS). […]
September 3, 2018

Waveform Candidates for 5G and Beyond

Current wireless communication technologies, such as Long Term Evolution (LTE) Advanced, adopt orthogonal frequency division multiplexing (OFDM) as the waveform candidate for the air interface. However, there are some key limitations, such as high peak to average power ratio (PAPR), low spectral efficiency, and strict orthogonality requirements, which significantly inhibit the performance of OFDM. To address the drawbacks of OFDM and satisfy the requirements of future communication networks, new waveforms […]
September 3, 2018

Physical-Layer Network Coding

In the current cellular architecture, illustrated in Figure 1, each base stations (BS) only have access to data symbols intended for users in its coverage area. As a result, BSs process user data independently, which result in poor service quality to users at the cell edge. This is mainly due to inter-cell interference caused by the separate processing at each BS. The heterogeneous nature of 5G and beyond systems coupled […]