On the capacity of multicarrier transmission over nonlinear channels

This paper presents new results on the achievable capacity of multicarrier systems impaired by clipping at the transmitter. A general framework for capacity analysis of multicarrier systems with complex baseband signals is derived, based on the mutual information of the transmitted and received sign...

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Bibliographic Details
Published in2005 IEEE 61st Vehicular Technology Conference Vol. 2; pp. 1148 - 1152 Vol. 2
Main Authors Zillmann, P., Fettweis, G.R.
Format Conference Proceeding
LanguageEnglish
Published IEEE 2005
Subjects
Additive white noise
AWGN
Baseband
channel capacity
Gaussian noise
Information analysis
Mutual information
Nonlinear distortion
OFDM
Signal analysis
Transmitters
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Summary:This paper presents new results on the achievable capacity of multicarrier systems impaired by clipping at the transmitter. A general framework for capacity analysis of multicarrier systems with complex baseband signals is derived, based on the mutual information of the transmitted and received signals. Specific results are given for the soft limiter nonlinearity with different values of the input power backoff (IBO), and for the hard limiter nonlinearity. These capacity results are a true upper bound for multicarrier systems with a large number of subcarriers and can be used for evaluation of receive algorithms for nonlinearly distorted multicarrier signals. It is shown that clipping results only in a small capacity loss even for low IBO.
ISBN:9780780388871
0780388879
ISSN:1550-2252
DOI:10.1109/VETECS.2005.1543487