naa a22 4500 51079355X CHVBK 20180411083328.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1007/s11277-012-0752-x doi (NATIONALLICENCE)springer-10.1007/s11277-012-0752-x The Impact of Nonlinear HPA on the Determination of the Impulse Sample Power in IP-OFDM Systems [Elektronische Daten] [Byung Lee, Youngok Kim] The recently introduced impulse postfix OFDM (IP-OFDM) system, which performs channel estimation in time-domain by exploiting the IP instead of pilot tones, can achieve the enhanced bit error rate (BER) performance compared to that of conventional OFDM systems. Since there is a peak-to-average power ratio (PAPR) issue of using the IP, however, the decision criteria for determining the power boosting factor (PBF) of IP were proposed to resolve the PAPR issue while achieving the optimum BER performance in the IP-OFDM system with an ideal high power amplifier (HPA). In this paper, a practical IP-OFDM system with a nonlinear HPA is considered and the impact of nonlinear HPA on the determination of the PBF of IP as well as the BER performance are analyzed. The BER lower bound is also derived in the case of QPSK and 16QAM. It is shown that the approximated lower bound approaches to the simulation results as the PBF is increased. According to the analytical results, due to the nonlinearity of the HPA, 1-3dB increased PBF than the ideal PBF is required to achieve the optimum BER performance, which is even deteriorated compared to that of IP-OFDM with an ideal soft envelope limiter. Springer Science+Business Media, LLC., 2012 Peak-to-average-power ratio (PAPR) nationallicence Impulse postfix OFDM (IP-OFDM) nationallicence High power amplifier (HPA) nationallicence Lee Byung Central R&D Laboratory, Korea Telecom (KT), 137-792, Seoul, Korea aut Kim Youngok Department of Electronic Engineering, Kwangwoon University, 139-701, Seoul, Korea aut Wireless Personal Communications Springer US; http://www.springer-ny.com 70/4(2013-06-01), 1353-1361 0929-6212 70:4<1353 2013 70 11277 https://doi.org/10.1007/s11277-012-0752-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-012-0752-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lee Byung Central R&D Laboratory, Korea Telecom (KT), 137-792, Seoul, Korea aut NATIONALLICENCE 700 1- Kim Youngok Department of Electronic Engineering, Kwangwoon University, 139-701, Seoul, Korea aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 70/4(2013-06-01), 1353-1361 0929-6212 70:4<1353 2013 70 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer