TITLE:
Performance Improvement of the DSRC System Using a Novel S and Π-Decision Demapper
AUTHORS:
Jeich MAR, Chi-Cheng KUO
KEYWORDS:
S and Π-decision Rule, Analog Demapper, DSRC System, OFDM
JOURNAL NAME:
Wireless Sensor Network,
Vol.1 No.4,
November
20,
2009
ABSTRACT: Based on the constellation diagram of the different modulations, a novel S and Π-decision rule is designed for the analog demapper of the orthogonal frequency-division multiplexing (OFDM) systems. The dedicated short-range communications (DSRC) system is chosen as an OFDM platform to compare the performance among the proposed S and Π-decision decoder, hard-decision and soft-decision decoders. Simulation results demonstrate that both the complexity and performance of S and Π-decision demapper used for M-ary quad-rature amplitude modulation (QAM) OFDM system can be greatly improved. The number of decisions be-tween the received symbol and constellation points can be simplified to look up table times for M-ary QAM OFDM system.