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http://dx.doi.org/10.5394/KINPR.2005.29.1.023

Performance Analysis of OFDM-DSRC System Using LMMSE Equalization Technique  

Sung Tae-Kyung (Graduate school of National Korea Maritime University)
Kim Soon-Young (Korea Hydro & Nuclear Power Company)
Rhee Myung-Soo (Korea Telecommunication)
Cho Hyung-Rae (Division of Radio & Information Communication Eng., National Korea Maritime University)
Publication Information
Journal of Navigation and Port Research / v.29, no.1, 2005 , pp. 23-28 More about this Journal
Abstract
The signal in wireless multi-path channel is affected by fading and ISI because of high data rate transmission, so the signal has the high error rate. The present modulation and demodulation method of DSRC system can not expect sufficient for providing data service over 1 Mbps, so the channel equalization and advanced modulation and demodulation methods are required. OFDM is generally known as an effective technique for high data rate transmission system, since it can prevent ISI by inserting a guard interval. However, a guard interval longer than channel delay spread has to be used in each OFDM symbol period, thus resulting a considerable loss in the efficiency of channel utilization Therefore the equalizer is necessary to cancel ISI to accommodate advanced ITS service with higher bit rate and longer channel delay spread condition In this paper, the channel equalizer for the OFDM -DSRC system was designed and its performance in a multi-path fading environment was evaluated with computer simulation.
Keywords
DSRC System; OFDM; ITS; LMMSE channel Equalization; Channel Equalizer;
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