Title :
Effects of time selective multipath fading on OFDM systems for broadband mobile applications
Author :
Li, Junsong ; Kavehrad, Mohsen
Author_Institution :
Dept. of Electr. Eng., Pennsylvania State Univ., University Park, PA, USA
Abstract :
The effects of time selective multipath fading are investigated for orthogonal frequency-division multiplexing (OFDM) systems in broadband mobile applications. Although in a multipath environment an OFDM system is very robust against frequency selective fading, it is very sensitive to time selective fading characteristics of the mobile channel, causing inter-carrier-interference and degrading system performance. To achieve a signal-to-interference ratio of 20 dB, the OFDM symbol duration must be less than 8% of the channel coherence time.
Keywords :
OFDM modulation; broadband networks; digital radio; fading channels; mobile radio; multipath channels; OFDM systems; broadband mobile applications; channel coherence time; inter-carrier-interference; orthogonal frequency-division multiplexing; signal-to-interference ratio; symbol duration; time selective multipath fading effects; Broadband communication; Delay; Fading; Frequency response; Mobile communication; Multimedia communication; OFDM modulation; Robustness; Scattering; Time varying systems;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/4234.809526
