Sharifi, Abbas Ali, Azarnia, Ghanbar. (1399). A comparative study of precoding techniques for PAPR reduction of OFDM signals. , 10(1), 1-15. doi: 10.22070/jce.2022.14969.1198
Abbas Ali Sharifi; Ghanbar Azarnia. "A comparative study of precoding techniques for PAPR reduction of OFDM signals". , 10, 1, 1399, 1-15. doi: 10.22070/jce.2022.14969.1198
Sharifi, Abbas Ali, Azarnia, Ghanbar. (1399). 'A comparative study of precoding techniques for PAPR reduction of OFDM signals', , 10(1), pp. 1-15. doi: 10.22070/jce.2022.14969.1198
Sharifi, Abbas Ali, Azarnia, Ghanbar. A comparative study of precoding techniques for PAPR reduction of OFDM signals. , 1399; 10(1): 1-15. doi: 10.22070/jce.2022.14969.1198

A comparative study of precoding techniques for PAPR reduction of OFDM signals

Journal of Communication Engineering
مقاله 1، دوره 10، شماره 1 - شماره پیاپی 20، فروردین 2021، صفحه 1-15    اصل مقاله (847.83 K)
نوع مقاله: Research Paper
شناسه دیجیتال (DOI): 10.22070/jce.2022.14969.1198
نویسندگان
Abbas Ali Sharifi* 1؛ Ghanbar Azarnia2
1Department of Electrical Engineering, University of Bonab, Bonab, Iran
2Engineering Faculty of Khoy, Urmia University of Technology, Urmia, Iran
چکیده
Orthogonal frequency division multiplexing (OFDM) is an attractive approach for multi-channel transmission. Due to some advantages such as high spectral efficiency, simplicity in channel equalization, and robustness to the fading channel, the OFDM technique has been generally used in many wireless communication devices. Besides these advantages, the OFDM systems usually experience a high peak-to-average power ratio (PAPR). As a result of the high PAPR, the OFDM signal is clipped during the passing via a non-linear power amplifier. The precoding techniques decrease the autocorrelation of the input data symbols to mitigate the high PAPR. In this paper, we compare WHMT, VLMT, DCMT, DHMT, DFMT, ZCMT, and CVMT precoding approaches in terms of autocorrelation and PAPR reduction performance. We demonstrate that the serial combinations of both ZCMT and CVMT precoding matrices with the IFFT matrix cancel the impact of each other when their dimensions are the same. In this case, a sparse matrix is produced and hence the PAPR of the OFDM signal is remarkably reduced. This issue is proved by the mathematical calculations and verified by the simulation results. It is also presented that DFMT, ZCMT, and CVMT precoding schemes have almost the same PAPR reduction performance and they are the best among their counterparts.
کلیدواژه‌ها
OFDM؛ PAPR؛ Precoding؛ ZCMT؛ CVMT
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