Performance Improvement of the DSRC System Using a Novel S and Π-Decision Demapper

• 作者: Chi-Cheng KUO Jeich MAR
• 来源期刊: 无线传感网络(英文)
• 学科: 工学
• 关键词: S and Π-decision RULE ANALOG Demapper DSRC SYSTEM OFDM
• 年，卷（期）: 2009,（4）
• 页码范围: 268-275
• 页数: 8页
• 分类号: TN91

摘要

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.