On peak to average power ratio of generalized frequency division multiple access

Abstract

Abstract:We propose a generalized frequency division multiple access (GFDMA) scheme which realizes a low PAPR characteristic compared with OFDMA, maintaining the sufficient capability of the frequency scheduling. GFDMA transmits the data with one or more frequency resources which can be divided into several pieces in the frequency domain. We can adaptively configure GFDMA between PAPRoriented configuration like as SC-FDMA and throughput-oriented configuration like as OFDMA, depending on requirements. We focus on the investigation on the PAPR characteristic of GFDMA. Computer simulation confirms that GFDMA has a low PAPR property compared with OFDMA, still keeping sufficient frequency resource allocation capability.

FPGA Implementation of Inverse Fast Fourier Transform in Orthogonal Frequency Division Multiplexing Systems

“…3 high peaks will be structured and as a result of destructive interference, the average power might be as low as zero. Hence, the ratio between peak and average will be high (Higashinaka et al, 2009). High Peak to Average Power Ratio (PAPR) is a major design challenge in OFDM systems (Krongold et al, 2003;Bauml et al, 1996;Wei et al, 2006).…”

Analyzing the effects of peak to average power ratio and digital predistortion in orthogonal frequency division multiplexing (OFDM) systems

“…Despite the advantages of OFDM signals like high spectral efficiency and robustness against ISI, the OFDM signals have some disadvantages which the main one is the high peak to average power ratio (PAPR) (Han and Lee, 2005;Jiang and Wu, 2008;Higanishaka et al, 2009). The reason of high PAPR is that in the time domain, the OFDM signal is actually sum of many narrowband signals.…”

Peak power reduction techniques for multi-channel SC-OFDM

“…SC-OFDM [1,2] is attractive in practice due to its low peak power and robust performance against multipath fading channels. In addition, computationally efficient frequency domain equalizers (FDE) can be utilized to combat multipath fading channels [3,4].…”