【摘要】 正交频分复用(OFDM)是信息高速传输的有效技术,由于它可以抵抗信道的多径衰落,且具有频谱利用率高、实现简单等一系列优点,因此成为未来移动通信的主要候选方案。本文提出了利用OFDM技术对DVB-T系统进行研究,通过建立系统的传输模型,用MATLAB仿真了理想信道和高斯白噪声信道中信号的传输情况,得到OFDM技术具有内在适应性,能够提高DVB-T系统的传输速率,特别适合在高斯信道中传输。更多还原

【Abstract】 OFDM(Orthogonal frequency division multiplexing) is the effective technology in the high-speed date transmission,due to its robustness against multi-path fading channel,its high bandwidth efficiency and simple realization,it has been regarded as one of the main candidate for the future mobile communication.This paper proposes a method of using OFDM technology to simulate the DVB-T system.Through the established transmission system model,using MATLAB to simulate the signal in ideal channel and Gaussian white noise channel.The simuliation proves that the OFDM technology can be an adaptive technology.It can improve the transmission rate of the DVB-T system and it is especially for the Gaussian channel.更多还原