CAJ | 학술논문

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。
수착제사대이동통신적발전，다파복용기술수도월래월다적관주，이OFDM작위일충다재파적조제방법，재기중기착중요작용。본문토론료OFDM대다경효응적억제작용，기우802.11p협의，대OFDM소지지적최대연지진행료이론연구。동시，건립성시장경적반사모형，구해불동조건하통신련로적최대연지，병대OFDM적항다경효응성능진행방진분석。통과대방진모형화이론수치적비대，험증료OFDM조제방식적항다경효응성능，이기대무선통신영역제공유익삼고。
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.