• A Akash

The Universal Filtered Multi Carrier (UFMC) system is a promising alternative waveform for both orthogonal frequency division multiplexing and filter bank multi-carrier systems due to its high spectral efficiency. However, UFMC undergoes with high peak-to-average power ratio (PAPR), which affects the efficiency of the power amplifier. Companding techniques are simple and proficient to reduce the PAPR of UFMC signals. In this paper, we use a companding technique, which is non-linear companding transform technique in UFMC system, which reduces PAPR of UFMC signals without changing the average power of the companded signal, is proposed. The proposed method offers flexibility in selecting companding parameters to achieve optimal performance in terms of PAPR, average power level, and bit error rate (BER). The proposed method confirms that the companding technique offers better PAPR reduction and BER characteristics when compared to the original UFMC signal and clipping technique. The BER of the proposed companding technique is assessed for higher order modulations and it presents better PAPR characteristics when compared to the original signal. UFMC system is implemented and comparative analysis are carried out in terms of M-ary QAM modulation scheme, side lobe attenuations of the Dolph-chebyshev filter and Bit Error Rate (BER) over different fading channels.

UFMC, PAPR, BER, QAM, Companding, Dolph-Chebyshev Filter

"PAPR analysis in UFMC system using companding technique for wireless communications", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.10, Issue 3, page no.i249-i258, March-2023, Available :http://www.jetir.org/papers/JETIR2303838.pdf

"PAPR analysis in UFMC system using companding technique for wireless communications", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.10, Issue 3, page no. ppi249-i258, March-2023, Available at : http://www.jetir.org/papers/JETIR2303838.pdf