论文部分内容阅读
随着正交频分复用技术(OFDM)的日益成熟,它在现实生活中的应用的范围也越来越广泛了。OFDM技术现在不仅广泛的应用在数字广播、数字电视中,而且由于其具有抗多径衰落,频谱利用率高,传输速度快的优点,被普偏认为是第四代移动通信物理层的关键技术之一,它能够同时为多个用户提供高数据速率的视频和语音服务。主要是针对基于802.16e标准的OFDM的不同调制解调方式在不同信道中传输的优缺点进行研究比较。
As Orthogonal Frequency Division Multiplexing (OFDM) matures, its range of applications in real life is also becoming more widespread. OFDM technology is not only widely used in digital broadcasting and digital television, but also considered as the key technology of the fourth generation mobile communication physical layer due to its advantages of anti-multipath fading, high spectrum utilization and fast transmission speed One, it can provide multiple users with high data rate video and voice services simultaneously. Mainly for 802.16e standard OFDM based on different modulation and demodulation methods in different channels to compare the advantages and disadvantages of transmission.