Abstract—There are several different waveforms used by the latest generation of wireless communication technologies. The Universal Filtered Multicarrier (UFMC) was selected because of its compatibility with a wide variety of numerology systems and its symmetrical nature. However, the high peak-to-average power ratio (PAPR) is a significant challenge for UFMC designs. While the Power-Averaged Perceived Roughness (PAPR) metric pinpoints the signal's highest point, the Cubic Metric (CM) pinpoints its out-of-band (OoB) and in-band (IB) distortion. Scrambling techniques like Selection Mapping (SLM) increase BER efficiency, while A-law and -law companding has been advanced to cut down on out-of-band interference (OBI) and PAPR, respectively. For companding techniques that don't introduce any distortions to the signal but increase PAPR and system complexity, the composite approach is utilized. Through simulation in MATLAB, we find that the SLM-companding UFMC model provides superior CM performance. For high-order modulation (256QAM), the CCDF-CM was reduced to 52% relative to eight-phase rotation vectors, a significant improvement over the standard UFMC.
 

Keywords—cubic metric reduction, 5G networks, universal filtered multicarrier

Cite: Farooq Sijal Shawqi, Lukman Audah, Sameer Alani, Ahmed Talaat Hammoodi, and Mohammed Ahmed Jubair, “Cubic Metric Reduction by Hybrid Companding-Universal Filtered Multi-carrier in 5G Networks," Journal of Communications vol. 18, no. 9, pp. 555-570, September 2023.

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