摘要
随着第四代移动通信的发展,多播复用技术受到越来越多的关注,而OFDM作为一种多载波的调制方法,在其中起着重要作用。本文讨论了OFDM对多径效应的抑制作用,基于802.11p协议,对OFDM所支持的最大延迟进行了理论研究。同时,建立城市场景的反射模型,求解不同条件下通信链路的最大延迟,并对OFDM的抗多径效应性能进行仿真分析。通过对仿真模型和理论数值的比对,验证了OFDM调制方式的抗多径效应性能,以期对无线通信领域提供有益参考。
With the development of the fourth generation mobile communication,many people pay attention to the mul-ticast multiplexing. As a multi-carrier modulation method,OFDM plays an important role in the multicast multiplexing. In this paper,the multipath effects based on the OFDM is discussed;and according to the 802.11p protocol maximum delay which the OFDM supported in the theory is studied. Meanwhile, the reflection model of urban scene is estab-lished;the maximum delay of communication link is solved under different conditions;and the anti-multipath effects OFDM performance simulation are analyzed. Through verifying the numerical simulation models and theories, the OFDM modulation scheme against multipath path effects is validated, thus a useful reference on the field of wireless communications is provided.
出处
《长春理工大学学报（自然科学版）》
2014年第1期134-137,共4页
Journal of Changchun University of Science and Technology(Natural Science Edition)
基金
工信部电子科技委发展研究课题资助
