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**Harvard**

Behravan, A. (2006) *Evaluation and Compensation of Nonlinear Distortion in Multicarrier Communication Systems*. Göteborg : Chalmers University of Technology (Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie, nr: 2479).

** BibTeX **

@book{

Behravan2006,

author={Behravan, Ali},

title={Evaluation and Compensation of Nonlinear Distortion in Multicarrier Communication Systems},

isbn={91-7291-797-0},

abstract={In modern wireless communication systems with increasing data transfer rate
and mobility, designing efficient transceivers is a key issue. Among different
challenges, nonlinearity of high power amplifiers is a problem that has to be
overcome by means of adding extra hardware or using more efficient signal
processing algorithms. Large signal envelope fluctuations of a multicarrier
signal compared to a single carrier is the motivation for extensive
investigations in this area.
<p />
This thesis covers different methods of overcoming the distortion caused by a
nonlinearity at the transmitter of a multicarrier communication system. The
focus is mainly on digital baseband compensation methods for multicarrier
signals undergoing a nonlinearity at the transmitter front-end. Digital baseband
predistortion and nonlinear equalization are examples of methods for linearizing
a nonlinear high power amplifier. Both of these methods are implemented and
compared in this thesis. We also implement a method based on intercarrier
interference cancellation to reduce the distortion at the receiver side by means
of iterative estimation and refining the received signal. Since this method is a
receiver side solution, no extra bandwidth or extra power is required, and only
a more complex receiver is needed.
<p />
Spectral spreading over the neighboring channel is a huge problem, that requires
some means of compensation at the transmitter. The spectral spreading can be
reduced by forming signals with less sensitivity to nonlinear amplifications. We
implement and compare methods of reducing peak-to-average power ratio (PAPR) of
a signal in order to limit the spectral outgrowth and improve the bit error rate
(BER) performance of the system. Complexity, bandwidth efficiency and power
efficiency are important factors that have to be considered in selection of
these method.
<p />
Except PAPR, other measures of the signal envelope variations can be used to
evaluate the susceptibility of signal to nonlinear amplification. We use a
measure related to the variance of the instantaneous power, and try to reduce
that, thereby improving the performance of the system.
},

publisher={Institutionen för signaler och system, Kommunikationssystem, Chalmers tekniska högskola,},

place={Göteborg},

year={2006},

series={Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie, no: 2479},

keywords={Multicarrier communication systems, nonlinearity, peak-to-average power ratio},

}

** RefWorks **

RT Dissertation/Thesis

SR Print

ID 20387

A1 Behravan, Ali

T1 Evaluation and Compensation of Nonlinear Distortion in Multicarrier Communication Systems

YR 2006

SN 91-7291-797-0

AB In modern wireless communication systems with increasing data transfer rate
and mobility, designing efficient transceivers is a key issue. Among different
challenges, nonlinearity of high power amplifiers is a problem that has to be
overcome by means of adding extra hardware or using more efficient signal
processing algorithms. Large signal envelope fluctuations of a multicarrier
signal compared to a single carrier is the motivation for extensive
investigations in this area.
<p />
This thesis covers different methods of overcoming the distortion caused by a
nonlinearity at the transmitter of a multicarrier communication system. The
focus is mainly on digital baseband compensation methods for multicarrier
signals undergoing a nonlinearity at the transmitter front-end. Digital baseband
predistortion and nonlinear equalization are examples of methods for linearizing
a nonlinear high power amplifier. Both of these methods are implemented and
compared in this thesis. We also implement a method based on intercarrier
interference cancellation to reduce the distortion at the receiver side by means
of iterative estimation and refining the received signal. Since this method is a
receiver side solution, no extra bandwidth or extra power is required, and only
a more complex receiver is needed.
<p />
Spectral spreading over the neighboring channel is a huge problem, that requires
some means of compensation at the transmitter. The spectral spreading can be
reduced by forming signals with less sensitivity to nonlinear amplifications. We
implement and compare methods of reducing peak-to-average power ratio (PAPR) of
a signal in order to limit the spectral outgrowth and improve the bit error rate
(BER) performance of the system. Complexity, bandwidth efficiency and power
efficiency are important factors that have to be considered in selection of
these method.
<p />
Except PAPR, other measures of the signal envelope variations can be used to
evaluate the susceptibility of signal to nonlinear amplification. We use a
measure related to the variance of the instantaneous power, and try to reduce
that, thereby improving the performance of the system.

PB Institutionen för signaler och system, Kommunikationssystem, Chalmers tekniska högskola,

T3 Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie, no: 2479

LA eng

OL 30