Paper Info
Title
Probability distribution analysis of M-QAM-modulated OFDM symbol and reconstruction of distorted data.
Abstract
Abstract It is usually assumed that N samples of the time domain orthogonal frequency division multiplexing (OFDM) symbols have an identical Gaussian probability distribution (PD) in the real and imaginary parts. In this article, we analyze the exact PD of M-QAM/OFDM symbols with N subcarriers. We show the general expression of the characteristic function of the time domain samples of M-QAM/OFDM symbols. As an example, theoretical discrete PD for both QPSK and 16-QAM cases is derived. The discrete nature of these distributions is used to reconstruct the distorted OFDM symbols due to deliberate clipping or amplification close to saturation. Simulation results show that the data reconstruction process can effectively lower the error floor level.
Year
DOI
Venue
2011
10.1186/1687-6180-2011-135
EURASIP J. Adv. Sig. Proc.
Keywords
Field
DocType
OFDM,discrete probability distribution,M-QAM,nonlinear amplifier,data reconstruction
Telecommunications,Probability distribution,Artificial intelligence,Time domain,Computer vision,Data reconstruction,Characteristic function (probability theory),Symbol,Algorithm,Gaussian,Mathematics,Orthogonal frequency-division multiplexing,Phase-shift keying
Journal
Volume
Issue
ISSN
2011
135
1687-6180
Citations 
PageRank 
References 
8
0.54
12
Authors
3
Name
Order
Citations
PageRank
Hyunseuk Yoo1213.01
Frédéric Guilloud2348.66
Ramesh Pyndiah37917.12