Title :
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
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;
Conference_Titel :
Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE
Print_ISBN :
0-7803-7632-3
DOI :
10.1109/GLOCOM.2002.1188398
