Performance Evaluation of UFMC for Future Wireless Communication Systems

Abstract

Abstract: One of the innovative waveforms for 5G networks is the Universal Filtered Multi-Carrier (UFMC) technology. Low latency, resilience to frequency offset, and a decrease in out-of-band (OoB) radiation are anticipated benefits of UFMC, which will raise spectral efficiency. As previously indicated, the UFMC system has numerous benefits; nevertheless, because it is a multicarrier gearbox technology, its Peak-to-Average Power Ratio (PAPR) is high. Companding, Precoding and Selected Mapping (SLM) methods are an easy and effective way to lower the PAPR of UFMC signals. This work proposes a Modified Mu-law Companding Transform (MMCT) that lowers the PAPR of UFMC approach without altering the companded signal's average power and a Discrete Sine Transform (DST) precoding PAPR reduction technique to reduce the complexity. These two techniques are combined with SLM separately and their performance is assessed in the matter of both PAPR and BER. The UFMC signal's big and small amplitudes are expanded using distinct scales in the MMCT scheme based on an inflection point. Also, the DST technique provides less PAPR by considering only the real components. As a result, there is greater freedom in selecting the compounding parameters that will yield the best results in terms of PAPR, average power level, and BER. The simulation findings verify that, in comparison to the original UFMC signal and OFDM technique, the proposed schemes offer higher PAPR and BER reduction characteristics.

Index Terms: Universal Filtered Multi Carrier, Selected Mapping, Modified Mu-Law Companding, Discrete Sine Transform, Peak to Average Power Ratio.