Performance analysis of OFDM in frequency selective time-variant channels with application to IEEE 802.16 broadband wireless access

@inproceedings{citeulike:1026601, abstract = {In this paper, the performance of orthogonal frequency division multiplexing systems in frequency selective and time-variant Rayleigh fading channels is analyzed. Channel variations severely degrade the performance of OFDM by introducing both a complicated multiplicative distortion and an additive intercarrier interference. The IEEE 802.16 standard is designed to provide broadband wireless-services for fixed and pedestrian terminals, and hence, the channel is assumed to be slowly variant during one OFDM symbol. Under this assumption, the multiplicative distortion can be simplified as a sum of two correlated Rayleigh random variables. Based on this simplification, and by observing that the signal-to-interference-plus-noise ratio of the OFDM system is similar to the expression of the signal-to-noise ratio at the output of an equal gain combiner, we derive a closed form analytical expression for the symbol error rate. The proposed analytical expression is verified through numerical evaluation using the parameters of the IEEE 802.16 standard.}, author = {Al-Gharabally, M. and Das, P. }, citeulike-article-id = {1026601}, journal = {Military Communications Conference, 2005. MILCOM 2005. IEEE}, keywords = {80216, broadband, channels, multipath, ofdm, time, wimax, wireless}, pages = {351--356 Vol. 1}, posted-at = {2007-11-14 09:10:33}, priority = {2}, title = {Performance analysis of OFDM in frequency selective time-variant channels with application to IEEE 802.16 broadband wireless access}, url = {http://ieeexplore.ieee.org/xpls/abs\_all.jsp?arnumber=1605709}, year = {2005} }

TY - CONF ID - citeulike:1026601 L3 - citeulike-article-id:1026601 TI - Performance analysis of OFDM in frequency selective time-variant channels with application to IEEE 802.16 broadband wireless access JF - Military Communications Conference, 2005. MILCOM 2005. IEEE SP - 351 EP - 356 Vol. 1 N2 - In this paper, the performance of orthogonal frequency division multiplexing systems in frequency selective and time-variant Rayleigh fading channels is analyzed. Channel variations severely degrade the performance of OFDM by introducing both a complicated multiplicative distortion and an additive intercarrier interference. The IEEE 802.16 standard is designed to provide broadband wireless-services for fixed and pedestrian terminals, and hence, the channel is assumed to be slowly variant during one OFDM symbol. Under this assumption, the multiplicative distortion can be simplified as a sum of two correlated Rayleigh random variables. Based on this simplification, and by observing that the signal-to-interference-plus-noise ratio of the OFDM system is similar to the expression of the signal-to-noise ratio at the output of an equal gain combiner, we derive a closed form analytical expression for the symbol error rate. The proposed analytical expression is verified through numerical evaluation using the parameters of the IEEE 802.16 standard. KW - 80216 KW - broadband KW - channels KW - multipath KW - ofdm KW - time KW - wimax KW - wireless AU - Al-Gharabally, M AU - Das, P PY - 2005/// UR - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1605709 ER -