Using guard interval signal to improve tone reservation method for peak-to-average power ratio reduction in orthogonal frequency division multiplexing systems

• Published in: IET signal processing Vol. 9; no. 6; pp. 476 - 483
• Main Authors: Sohtsinda, Hermann, Bachir, Smail, Perrine, Clency, Duvanaud, Claude
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 01.08.2015; Institution of Engineering and Technology
• Subjects: additive white Gaussian noise; AWGN channels; Engineering Sciences; Fluctuation; Gain; guard interval signal; Guards; IEEE 802.11a standard; Intervals; network quality of service; null subcarriers; OFDM modulation; optimisation; Orthogonal Frequency Division Multiplexing; orthogonal frequency division multiplexing systems; PAPR reduction; peak‐to‐average power ratio reduction; quality of service; radio frequency circuit nonlinearities; Rayleigh channels; Rayleigh fading channels; Reduction; Subcarriers; tone reservation; tone reservation method; TRNS method; TRNS performances; wireless communication systems; wireless LAN; wireless local area network; Rayleigh channels; TRNS method; orthogonal frequency division multiplexing systems; Rayleigh fading channels; quality of service; radio frequency circuit nonlinearities; wireless local area network; AWGN channels; PAPR reduction; guard interval signal; IEEE 802.11a standard; optimisation; null subcarriers; peak-to-average power ratio reduction; TRNS performances; tone reservation method; wireless communication systems; OFDM modulation; additive white Gaussian noise; network quality of service; wireless LAN; tone reservation
• ISSN: 1751-9675; 1751-9683; 1751-9683
• DOI: 10.1049/iet-spr.2014.0288

Although orthogonal frequency division multiplexing is adopted by many standards in wireless communication systems, it generates high peak fluctuations which are affected by radio frequency circuit non-linearities, reducing the power efficiency and the network quality of service. In recent years, tone-reservation using null subcarriers (TRNS) scheme has been proposed to reduce the level of these fluctuations, measured by the peak-to-average power ratio (PAPR). However, TRNS performances only depend on the available number of null subcarriers in the current standards. In this study, a new scheme to improve TRNS performances by including the samples of the guard interval signal within the parameters of the optimisation algorithm is proposed, allowing higher PAPR reduction gain and requiring no side information. Simulations under the wireless local area network IEEE 802.11a standard show that the new method does not violate the specified spectrum mask and achieves a higher PAPR reduction gain compared to TRNS method. Also, the evaluation of bit error rate and error vector magnitude under additive white Gaussian noise and Rayleigh fading channels shows a comparable level of the quality of communication between the two schemes.