Effects of cartesian clipping noise on the performance of orthogonal frequency division multiplexing system: a theoretical approach

Author

Nikopour, Hosein ; Jamali, S. Hamidreza

Author_Institution

Dept. of Electr. & Comput. Eng., Tehran Univ., Iran

Volume

2

fYear

2002

fDate

17-21 Nov. 2002

Firstpage

1254

Abstract

We introduce an exact theoretical approach for computing the symbol error rate of a M-QAM orthogonal frequency division-multiplexing (OFDM) system in the Cartesian clipping channel. Cartesian clipper clips the discrete time domain samples of the I/Q (in-phase/quadrature) components of the complex baseband OFDM signal separately. An exact expression is derived for the probability density function (PDF) of the clipping noise at the output of OFDM demodulator. Using this PDF, we can compute the performance of the OFDM system for each subcarrier. This approach has the accuracy of the simulation approach while it is not time consuming.

Keywords

OFDM modulation; demodulators; error statistics; probability; quadrature amplitude modulation; Cartesian clipping channel; Cartesian clipping noise; I/Q components; M-QAM OFDM system; OFDM demodulator; PDF; clipping noise; complex baseband OFDM signal; discrete time domain samples; exact expression; in-phase/quadrature components; orthogonal frequency division multiplexing system; orthogonal frequency division-multiplexing; probability density function; simulation approach accuracy; subcarrier; symbol error rate; Baseband; Computational modeling; Demodulation; Frequency conversion; Gaussian distribution; Nonlinear distortion; OFDM; Peak to average power ratio; Performance analysis; Probability density function;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE

Print_ISBN

0-7803-7632-3

Type

conf

DOI

10.1109/GLOCOM.2002.1188398

Filename

1188398