"JOURNAL OF RADIO ELECTRONICS" (Zhurnal Radioelektroniki ISSN 1684-1719, N 6, 2017

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Modified tone reservation method for OFDM signal with small number of subcarriers


A. S. Levchenko 1, K. S. Mityagin 2

1 National Research University "Moscow Power Engineering Institute", 111250, Russian Federation, Moscow, Krasnokazarmennaya street, 14

2 Moscow Institute of Physics and Technology (State University), 141701, Russian Federation, Dolgoprudniy, Institutskiy pereulok, 9


The paper is received on May 21, after correction - on June 20, 2017


Abstract. The main disadvantage of data transmission systems based on OFDM is a high peak-to-average power ratio (PAPR) of OFDM signal. One of the most powerful methods of PAPR decrease is a tone reservation method. However it has low performance when signal bandwidth is narrow. Modified tone reservation method that allows reduction PAPR in comparison with classic TR method is proposed in the paper. Additional PAPR reduction is obtained using limited outband emission which doesn’t violate requirements of electromagnetic compatibility. Comparative modeling of classic and modified tone reservation method was performed for transmission part of second generation Realtime Audiovisual Information System (RAVIS). Complementary cumulative distribution functions are given in the paper. Results of modeling shows that modified TR method allow to decrease peak-to-average power ratio by additional 1.50, 1.23, 0.77, 0.58, 0.29, 0.23 dB when 2.5% of carriers are used for TR and 0.73, 0.64, 0.50 0.65, 0.66, 0.63 dB when 5% of carriers are used for TR within signal bandwidth 100, 200, 250, 500, 750, 1000 kHz respectively. Achieved PAPR values with confidence level γ=0,999 are in range from 7.56 to 7.74 dB when 2.5% of carriers are used for TR and in range from 6.65 to 7.38 dB when 5% of carriers are used for TR. Proposed method is capable to compete with SeLective Mapping (SLM) method even within narrow signal bandwidth, where SLM have high efficiency. Thus proposed modified TR method provides significantly better decrease of PAPR within narrow and wide signal bandwidth than classic method with the same data transmission rate losses.

Key words: OFDM, peak-to-average power ratio, tone reservation method, outband emission, RAVIS.


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For citation:

A.S.Levchenko, K.S.Mityagin Modified tone reservation method for OFDM signal with small number of subcarriers. Zhurnal Radioelektroniki - Journal of Radio Electronics, 2017, No. 6. Available at http://jre.cplire.ru/jre/jun17/9/text.pdf. (In Russian)