Jordan University of Science and Technology, Irbid, Jordan
Topics
Wireless Communication Systems Spread Spectrum Communications
Biography
Today’s wireless networks can’t meet the upcoming traffic demands. Future wireless networks, e.g., 6G networks, require a flexible network architecture that is adaptable to different scenarios and technologies. Modulation types and waveforms are key for achieving flexibility. Hence, their design is critical for meeting the requirements of future networks such that various sorts of traffic can be managed within the same band. To meet flexibility requirements, new sorts of waveforms have been proposed, such as orthogonal frequency division multiplexing (OFDM), filter bank multicarrier (FBMC),timefrequency packed signaling (TFS), and single carrier modulations (SCM). The waveforms that will be used have been analyzed and evaluated in terms of spectral efficiency and performance metrics. FBMC combines multiplexing and modulation by dividing the wideband channel into narrowband channels known as subchannels. The intricate modulation values in FBMC systems are distributed across multiple carriers and filtered through a prototype filter. The simplicity and low complexity of OFDM systems, results received limited attention for FBMC systems. Cyclic preifx-based OFDM (CP-OFDM) has been used in different new wireless communication networks. Despite its many advantages, it also has notable disadvantages which include frequency offset sensitivity, high peak-to-average power ratio (PAPR), and the use of cyclic preifx (CP) which results in reducing the spectral efficiency. Waveforms such as FBMC have recently been viewed as alternative waveforms to CPOFDM. FBMC has the advantage of reducing interchannel interference (ICI) and out-ofband (OoB) radiation, while improving the spectral efficiency. FBMC can enhance the spectral efficiency by eliminating the CP.
