Performance analysis of soft decision applied demodulation process in dedicated short range communication based on IEEE 802.11p protocol

摘要

The p group in IEEE 802.11 protocol suite solves the problem of wireless access in vehicular environment (WAVE), for the very IEEE 802.11p protocol has defined the specific system design strategy for dedicated short range communication (DSRC). Serving as a macro frame, IEEE 802.11p still requires technical definition in detail when it has been put into application. Consider that a high reliable data demodulation process can be important in providing better communication performance, and consider that soft decision technique has already been verified as a effective way in improving the quality of data demodulation, it is meaningful to discuss the technical design and the effectiveness in introducing soft decision into the data demodulation process in IEEE 802.11p based DSRC system. Related research on performance analysis of IEEE 802.11p focus mostly on various communication scenarios of WAVE, with data demodulation process being seldom considered. In this paper, a DSRC system based on IEEE 802.11p has been built in simulation system with soft decision applied in its data demodulation process, and the performance of such system has been analyzed in detail.