2016/12/29 by Sergey Zhidkov, Zhidkov, Sergey V.
Computer Science · Engineering · #Advanced Power Amplifier Design #FOS: Computer and information sciences #Information Theory (cs.IT) #PAPR reduction in OFDM #Wireless Communication Networks Research
paper · pdf · doi:10.48550/arxiv.1612.09222
openalex publication_date 2016/12/29 · openalex created_date 2017/01/06 · openalex updated_date 2026/07/28
Nonlinear distortion in power amplifiers (PA) can significantly degrade performance of orthogonal frequency division multiplexed (OFDM) communication systems. This paper presents a joint maximum-likelihood channel frequency response and nonlinear PA model estimator for OFDM signals. Derivation of the estimator is based on Taylor-series representation of power amplifier nonlinearity and is suitable for wide range of memoryless PA models. A sub-optimal decision-aided algorithm for adaptive compensation of nonlinear distortion effects at the receiver-side is also presented. It is shown that the proposed algorithms can be used in IEEE 802.11a/g/p/ac compliant wireless LAN receivers without any modifications at the transmitter side. The performance of the proposed algorithms is studied by means of computer simulation.